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Suffix, Master source Search terms:

Suffix Used for series, Bearing Description Obselete Suffix Bearing type
Components, Variations group
(X) Used only as additional material letter, e.g. TX, to differantiate similar material 1, 4 BL
Two or more bearings matched for even radial load distribution. The figure preceding S indicates the
.S INA series number of bearings which have been matched (e.g. NK 50/25/2S)
/1 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0,025 mm, lower limit: 0 4 BT
/-1 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: 0, lower limit: -0,025 mm 4 BT
/11 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: + 0,025 mm, 4 BT
lower limit: -0,025 mm
/15 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: + 0,038 mm, 4 BT
lower limit: -0,038 mm
/1A Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: + 0,0375 mm, lower limit: - 4 BT
0,0125 mm
/2 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0,050 mm, lower limit: 0 4 BT
/-2 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: 0, lower limit: -0,050 mm 4 BT
/22 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0,050 mm, 4 BT
lower limit: -0,050 mm
/2A Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0.0625 mm, 4 BT
lower limit: +0,0125 mm
/3 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: + 0,075 mm, lower limit: 0 4 BT
/-3 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: 0, lower limit: -0,075 mm 4 BT
/4 Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: + 0,1 mm, lower limit: 0 4 BT
/4DR Matched bearing sets Four sets of "Two bearings in tandem".Loading case: radial only 4 BC
/G82 Nuts Made of G82 SG cast iron
/I Rolling elements Tolerance class 4
/II Rolling elements Tolerance class 4
/III Rolling elements Tolerance class 4
/IV Rolling elements Tolerance class 4
/J Inch size Stricter silent running requirements (cones only) 4 BT1
/Mx Balls and Diameter tolerance group, M = minus. The figure (repr. by x) gives the mean deviation of grade 4
Cylindrical rollers from nominal diameter, expressed in µm.
/Mx/Mx Needle rollers Diameter tolerance group, M = minus. The figure (repr. by x) gives the grade limits, 4
expressed in µm.
/N Balls and Diameter tolerance group, N = zero 4
Cylindrical rollers
/N/Mx Needle rollers Diameter tolerance group, M = minus, N = zero. The figure (repr. by x) gives the grade limits, 4
expressed in µm.
/Px Balls and Diameter tolerance group, P = plus. The figure (repr. by x) gives the mean deviation of grade 4
Cylindrical rollers from nominal diameter, expressed in µm.
/Px/N Needle rollers Diameter tolerance group, P = plus. The figure (repr. by x) gives the grade limits, 4
expressed in µm. N = zero
/Px/Px Needle rollers Diameter tolerance group, P = plus. The figure (repr. by x) gives the grade limits, 4
expressed in µm.
/V Rolling elements Tolerance class 4
/W Inch size Ring width tolerance reduced to +0.050 - -0 mm 4 BT
0 Bearings with parts of Parts concerned: BC = complete bearing 4 Any
material other than normal
and/or with parts specially
hardened
01 series RRM. Special tolerance on rings 1
01 Machine tool spindle units Spindle nose design: lathe spindle nose to DIN 55021
02 Machine tool spindle units Spindle nose design: lathe spindle nose to DIN 55022
1 Bearings with parts of Parts concerned: Outer ring plus inner ring (OR + IR) 4 Any
material other than normal
and/or with parts specially
hardened
1 Machine tool spindle untis Lubrication: grease
10 Machine tool spindle units Spindle nose design: milling, spindle nose to DIN 2079
-118 Roller bearing units Labyrinth seal (for pop realese) US made
-18 Roller bearing units Labyrinth seal (for collar mounted) US made
2 Bearings with parts of Part concerned: OR = outer ring 4 Any
material other than normal
and/or with parts specially
hardened
2 Machine tool spindle units Lubrication: circulating oil
20 Machine tool spindle units Spindle nose design: drilling, spindle nose to DIN 55058, for adjustable adapters.
2B Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0,075 mm, 4 BT
lower limit: +0,025 mm
2C Inch size Prefix K. Close and/or displaced tolerance on total width T, upper limit: +0,1 mm, 4 BT
lower limit: +0,050 mm
2CS Contact seal at each side of the bearing. The seal is of steel sheet and rubberised cloth. 2 BSC
2CS2 Contact seal at each side of the bearing. The seal is of steel sheet and rubberised cloth. 2 BSC
2CS5 Contact seal at each side of the bearing. The seal is of steel sheet and rubberised cloth. 2 BSC;BS2
2F Superagriseals + Flingers at both sides 2 BBY
2FF Superagriseals + Flocked flingers at both sides 2 BBY
2LS Contact ('land-riding') seal at each side of the bearing. The seal used for deep groove ball 2 BB
bearings consists of a reinforcement plate with rubber moulded to it; that used for Y-bearings of a
rigid plate shield to which rubber is moulded. The inner ring has no recesses.
2LS1 Narrow land riding LS1P seal 2 BBY

2LS1F Narrow land riding LS1P seal plus flocked flinger 2 BBY
2LS8 Modified LS seal for low torque (Philadelphia) 2 BBY
2LS9 Modified LS seal for high torque (Philadelphia) 2 BBY
2LSF Land riding agri seal plus flocked flingers used for Y-bearings 2 BBY
2LST Triple lip seal (forseen for Series 4462(00)) 2 BBY
2NS High friction contacting seal at each side of the bearing 2 BSC

3
2PZ Plastic shield (non contact seal), at each side of the bearing. The inner ring has no recesses 2 BB
2R Two snap rings inside OR in cageless CARB bearing 2 BSC
2RF Bearing with agri seal + rubberised flinger 2 BBY
2RS Contact seal at each side of the bearing. The seal is of steel sheet and rubberised cloth. 2 BB; BA2; BJ2; BL
Inner ring with recesses.
2RS1 Contact seal at each side of the bearing. The seal consists of a reinforcement plate with 2 BA2; BB; BJ2
rubber (generally black) moulded to it. It withstands continuous operation at temperatures
from -20º C to +120º C.
2RS14 Contact seal at each side of the bearing. The seal consists of a reinforcement zinc coated steel 2
insert with rubber moulded to it. It withstands continuous operation at
temperatures from -20º C to +120º C.
2RS1N (2RS1 + N) Contact seal at each side of the bearing. Snap ring groove in outer ring 2 BA2; BB
2RS1NR (2RS1 + NR) Contact seal at each side of the bearing. Snap ring groove including appropriate 2 BA2; BB
snap ring for axial location of the bearing in outer ring
2RS2 Contact seal at each side of the bearing. The seal consists of a reinforcement plate with 2 BA2; BB
rubber (generally red) moulded to it. It will withstand continuous operation at temperatures up to
2RS24 +175º C seal at each side of the bearing. Zink coated reinforcement plate with rubber moulded to it.
Contact 2 BA2
It will withstand continous operation at temperatures up to + 175º C
2RS2N (2RS2 + N) Contact seal at each side of the bearing. Snap ring groove in outer ring 2 BA2; BB
2RS2NR (2RS2 + NR) Contact seal at each side of the bearing. Snap ring groove including appropriate 2 BA2; BB
snap ring for axial location of the bearing in outer ring
2RSH Axial contacting double lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (NBR) moulded to it. Inner ring with recess.
2RSH2 Axial contacting double lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (FKM) moulded to it. Inner ring with recess.
2RSH3 Axial contacting double lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (ACM) moulded to it. Inner ring with recess.
2RSH5 Axial contacting double lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (HNBR) moulded to it. Inner ring with recess.
2RSL Axial contacting single lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (NBR) moulded to it. Inner ring with recess.
2RSL2 Axial contacting single lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (FKM) moulded to it. Inner ring with recess.
2RSL3 Axial contacting single lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (ACM) moulded to it. Inner ring with recess.
2RSL5 Axial contacting single lip seal at both sides of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (HNBR) moulded to it. Inner ring with recess.
2RSN (2RS + N) Contact seal at each side of the bearing. The seal is of steel sheet and rubberised 2 BB; BL
cloth. Inner ring with recesses. Snap ring groove in outer ring
2RSNR (2RS + NR). Contact seal at each side of the bearing. The seal is of steel sheet and 2 BB; BL
rubberised cloth. Inner ring with recesses. Snap ring groove including appropriate snap ring for axial
location of the bearing in outer ring.
2RZ Low friction contact seal at each side of the bearing 2 BB
2TS1 Seals at both sides of the bearing. Lip made of Desmopan and insert of Durethan material 2 BB1
2Z Shield (gap seal) at each side of the bearing, generally of pressed sheet metal. 2 BB; BL
2ZN (2Z + N) Shield (gap seal) at each side of the bearing. Snap ring groove in outer ring 2 BB; BL
2ZNR (2Z + NR) Shield (gap seal) at each side of the bearing. Snap ring groove including appropriate 2 BB; BL
snap ring for axial location of the bearing in outer ring.
3 Bearings with parts of Part concerned: OR = outer ring 4 Any
material other than normal
and/or with parts specially
hardened
3 Machine tool spindle units Lubrication: Oil mist
-3 Roller bearing units Garter spring seal (for collar mounted) US made
30 Machine tool spindle units Spindle nose design: Spindle with machine taper to DIN 228, for taper shank
308228 Balls Special material and tolerances 4
342460 Bearings for paper machines .eg. dry cylinder X 3, 4 BC1
344008 Special inspection of dimensional and running accuracy, bearings with a low noise level to be 4 Any
selected. Bearings to be washed and dipped in hot vaseline.
344010 Specification for all gudgeon pin bearings 1, 4 BCG
344011 Adapter sleeves Specification for adapter sleeve
344012 Withdrawal sleeves Specification for withdrawal sleeves
344013 Specification for deep groove ball and cylindrical roller bearings for high-speed mining 3, 4 BB1; BC1
machinery (Eickhoff, Bochum)
344016 Reduced tolerances for inner and outer rings of 6214 for ZF, Friedrichshafen 4 BB1
344017 As 344016 but for 6217 4 BB1
344019 Specification for taper roller bearings for Maybach, Voith and Krupp, Essen (Replaced by Normal) X 4 BT1
344025 Radial cylindrical roller bearings for rotary compressors (see 344064), (SLM, Winterthur) X 4 BC1
344027 Specification for bearings for converter and rolling mill motors 4 BB1; BC1
344031 Reduced axial runout of thrust ball bearings 51134 and 51136 4 BD1
344032 Reduced radial clearance of deep groove ball bearings (SEL, Landshut) (Repl. by C2) X 4 BB1
344033 Reduced radial clearance of deep groove ball bearings X 4 BB1
344051 Special axial clearance for radial deep groove ball bearings 6306 (Auto Union, Ingolstadt) 4 BB1
344054 Specification for radial cylindrical roller bearings (Klein, Schanzlin + Becker, Frankenthal) X 4 BC1
344055 Radial deep groove ball bearings 6206, lower radial internal clearance limit to be kept; noise 4 BB1
tested (Ernst Heinkel AG)
344057 Radial spherical roller bearings 21307/C3 with bore tolerance 35 -0,004 4 BS2
(Triumpf Werke AG, H. Lanz, Mannheim)
344059 Radial deep groove ball and cylindrical roller bearings 6207 and N 207 N, lower radial internal 4 BB1; BC1
clearance limit to be kept, noise tested (Ernst Heinkel AG)
344064 Radial cylindrical roller bearings for rotary compressors (see 344025), (Demag, Duisburg) X 4 BC1
344066 Radial cylindrical roller bearings N 207 N, radial clearance 16 to 25 µm, noise tested 4 BC1
(Ernst Heinkel AG)
344067 Radial spherical roller bearings 22311 M and 22311 C, radial clearance 16 to 25 µm X 4 BS2
(M.A.N., Augsburg) (Repl. by C5)
344077 Balls Balls for steering gear X
344077A Balls Balls for steering gear (Ford, Cologne) X
344077B Balls Balls for steering gear (Opel, Rüsselheim) X
344081 6306 N with special chamfer inspection (Daimler Benz) X 4 BB1
344082 608 with radial internal clearance C5 (Günther Wulff, Berlin) 4 BB1
344086 625 with radial internal clearance in 3 classes 4 BB1
344090 Radial deep groove ball bearings to WM032, noise tested and special radial clearance 4 BB1
344091 Radial deep groove ball bearings 4201, special inspection measurements X 4 BB2
344093 Radial deep groove ball bearings 6205 TB to WM039 matched in pairs to take up load 4 BB2
in one direction
344099 Double row angular contact ball bearings 3200 A to 3208 A, axial clearance C2, inspection X 4 BA2
344100 Radial spherical roller bearings, carefully cleaned 4 BS2
344103 Radial deep groove ball bearings 6304, axial clearance smaller than 0,1 mm 4 BB1
344106 Thrust ball bearings 53310 U. Good contact between sphered housing washer and seating ring 2 BD1

4
344109 Radial deep groove ball bearings 6203-2Z, noise tested, special axial internal clearance 4 BB1
and grease
344111 Radial cylindrical roller bearings with J-type cage X 3 BC1
344112 Series NJ Radial cylindrical roller bearings type NJ with J-type cage 3 BC1
344115 Radial cylindrical roller bearings for 'mole' motors, inspection, components packed separately X 4 BC1
344116 Rolling bearings, bores sorted in 3 classes (Repl. by B21) X 4 BB1; BC1
344117 Radial spherical roller bearings (for Messrs. Steinmüller, Gummersbach) 2, 4 BS2
344118 Low friction cylindrical roller, deep groove and self-aligning ball bearings X 4 BB1; BC1; BJ2
344133 Thrust ball bearings and radial angular contact ball bearings, P6, section heigh in groups 4 BA1; BD1
344139 Radial cylindrical roller bearings with special radial internal clearance 4 BC1
344140 Radial deep groove ball bearings 6032/C3, radial clearance sorted into 3 classes 4 BB1
344143 Radial deep groove ball bearings 6208/C3, 6208/C4, 6207/C3 with special chamfer on inner ring X 2 BB1
344144 Radial deep groove ball bearings 6408 with special chamfer on outer ring 2 BB1
344145 Series 160, 60 and 62 Radial deep groove ball bearings series 160, 60, 62 with special radial internal clearance X 4 BB1
(Repl. by C3FS0)
344146 Radial deep groove ball bearings with special axial internal clearance X 4 BB1
344147 Radial double row angular contact ball bearing 3203 A for pneumatic motors X 4 BA2
344152 Radial deep groove ball bearing 6305-Z/C3, reduced distance of shield from inner ring side face 2 BB1
344153 As 344152, but for 6306-ZN X 2 BB1
344157 Radial angular contact ball bearings (7217 M, 7317 M, 7318 M) with high accuracy for X 4 BA1
mounting in pairs. (Replaced by P5DBA)
344160 Radial deep groove ball bearings 6305/C3, 6306/C3, 4 classes of outer ring width 4 BB1
344165 Radial deep groove ball bearings 6204 MA for turbo compressor 3, 4 BB1
344167 Series 32 and 33 Double-row angular contact ball bearings series 32, 33 as cam followers X 2 BA2
344169 Radial cylindrical roller bearings, inner ring with rollers for mounting in pairs X 4 BC1
(Replaced by Standard)
344171 Radial deep groove ball bearing 6203 Z/C3 with special grease X 4 BB1
344174 Radial cylindrical roller bearings for traction motors 4 BC1
344177 Radial cylindrical roller bearings NN 30 KM/SP, special marking specification 4 BC2
344178 Radial cylindrical roller bearings for Sendzimir rolling mills, marking specification 4 BC
344182 Radial double row angular contact ball bearings 3206 A, axial internal clearance C2 4 BA2
344183 Radial deep groove ball bearings 6208, radial clearance C4, subdivided in 3 classes 4 BB1
344187 Radial cylindrical roller bearings N 2315 M/C2, crowned outer ring track X 1 BC1
344188 Radial double row cylindrical roller bearings NNU 4920 K/P52, NNU 4924 K/P52, 4 BC2
NNU 4928 K/P52, NN 3016 K/SP, outer ring radial runout 10 to 20 µm
344189 Series NUP 2, NUP 3 Radial cylindrical roller bearings series NUP 2, NUP 3, NUP 22, special axial clearance 4 BC1
and NUP 22
344190 Radial cylindrical roller bearings NU 207 N/C6 4 BC1
344191 Radial cylindrical roller bearings RN 2305 for mounting in pairs, special window, type cage 3, 4 BC1
344192 Ball bearings, machined cage, stabilised, balls to 344199 X 3, 4 BB1; BDQ
344193 Series 112 and 113 Radial self-aligning ball bearings series 112 and 113, reduced bore tolerance 4 BJ2
344194 Spherical roller bearings (Repl. by 344225) X BS2
344196 Sets of four needle roller bearings having as nearly indentical radial internal clearance as possible 4 BN4
344198 Double row cylindrical roller bearings series NN 30/SP, NN30 K/SP, NNU 49/P5, NNU 49 K/P5 1 BC2
344199 Balls Balls, also marking of bearings tested with balls to this specification X
344200 Series 60 and NU 10 Radial bearings, diameter series 0 (series 60, NU 10 (NUE) with annular groove to old 2 BB1; BC1
dimension plan DIN 616)
344201 Paired radial deep groove ball bearings 6207 4 BB1
344207 Radial deep groove ball bearings without inner ring 2 BB1
344209 Radial deep groove ball bearings 6310 and 6312, paired 4 BB1
344210 Full complement taper roller bearings 30302 V 1 BT1
344213 Radial roller bearings (drawing No.), components packed separately (rings, cage, roller sets) 4 BC1
344215 Radial deep groove ball bearings 6206, noise tested, C2, groove radius specification 4 BB1
344216 Roller bearings, special inspection. (Replaced by VA301) X 4 Any
344217 Radial angular contact ball bearings 3312 A to 3314 A, axial internal clearance C2 4 BA2
344218 Thrust ball bearings with machined iron cage X 4 BD; Be
344222 Radial taper roller bearings for injection pumps X 4 BT1
344223 Radial bearings, paired (Repl. by DR) X 4 BB1; BS2
344225 Thrust ball bearings and double row cylindrical roller bearings series NN 30 (K)/SP, 4 BD; Be; BC2
NNU 49 (K)/P51
344226 Thrust ball bearings with reduced section heigh 4 BD; BE
344227 Sleeves Radial spherical roller bearings and sleeves for diesel and electric locomotives. X 4 BS2
(Replaced by VA350)
344228 Radial cylindrical roller bearings, marking of non-interchangeable components 4 BC
344232 Radial cylindrical roller bearings NU and/or NJ 320 MA/C4NA, paired X 4 BC1
344235 Radial cylindrical roller bearings NJ 330 FE for electrical locomotives, for -50º C operating temp. 4 BC1
344237 Radial deep groove ball bearings 6212 MAS, paired 4 BB1
344238 Radial deep groove ball bearings, slushed in Sera 9 4 BB1
344243 Radial cylindrical roller bearings with outer ring groove, types NU-N (EN), NUP-N (EN), X 2 BC1
N-N (EN), cage position and/or loose flange ring specified
344244 Shielded radial deep groove ball bearings, bearings immersed in Lubro before inserting shields 4 BB1
344245 Double row cylindrical roller bearings NN 3040 K/SP to NN 30/500 K/SP, 4 BC2
NNU 4940 K/P5 to NNU 49/500 K/P5, radial clearance 10 to 60 µm
344246 Radial spherical roller bearings 23236 CY for -50º C operating temperature 4 BS2
344247 Rolling bearings marked using Lectroetch method 4 Any
344248 Radial deep groove ball bearings, one shield or seal at the unmarked bearing side 4 BC
344249 Radial cylindrical roller bearings, flange guided machined brass cage sandblasted 3 BA;
(for SKF-Göteborg)
344251 Angular contact radial ball bearings, paired X 4 BA1
344252 Radial deep groove ball bearings 6040 MA/C3 S00 4 BB1
344253 Radial cylindrical roller bearings N 230 MB/C4NA, N 234 MB/C4NA, N 336 MB/C5NA. X 4 BC1
Rings S0, rollers C9S0
344255 Radial rolling bearings, matched sets of 3 bearings (type NU, RNU or similar) X 4 BC
344256 Radial spherical roller bearings, etched, dry lubricated with MoS2 4 BS2
344257 Radial cylindrical roller bearings, inner rings 100 % etching inspection for visible troostite X 4 BC
344261 Radial deep groove ball bearings 6304/C3, outer ring width sorted in 3 classes 4 BB1
344265 Radial deep groove ball bearings 6212/C3, 6306/C3, paired 4 BB
344266 Cages Radial cylindrical roller bearing cages, phosphated and treated with MoS2 3 BC
344267 Sleeves Adapter sleeves for fixation of pump wheels
344269 Radial deep groove and angular contact ball bearings and cylindrical roller bearings and X 4 BA; BB; BC;
thrust ball bearings, etched and dry lubricated with MoS2 for reactor BD; BE
344270 Balls Copper and nickel-plated steel balls
344271 Radial cylindrical roller bearings with flange guided light alloy cage (LAS) for high speed X 3 BC1
planetory gears. (Replaced by standard)
344272 Spherical roller thrust bearings 29412, special type sleeve with one row of lubrication holes only 2 BHS
344275 Radial cylindrical roller bearings NU 219, NU 317, inner ring width tolerance 0 to -20 µm X 4 BC1
(Replaced by VQ114)
344276 Radial deep groove ball bearings 6008/P5, radial runout of inner ring max. 0.003 mm 4 BB1
344277 Radial spherical roller bearings, special inspection, coated with MoS2, preservation and packing X 4 BS2

5
344278 Radial deep groove ball bearings 6205 ZN/C3, inner ring width sorted in 3 classes 4 BB1
344279 Spherical roller thrust bearings with machined cage, inspection procedure 3, 4 BHS
344281 Balls and rollers Phosphated cylindrical rollers and balls
344282 Radial spherical roller bearing 22322/342350, screen design with C3 radial internal clearance, 4 BS2
cage bore treated with MoS2
344283 Radial cylindrical roller bearings, matched sets of NJ 2216 MA/C3 + NU 2216 MA/C3 + HJ 216 4 BC1
344284 Radial cylindrical roller bearings, measured radial internal clearance etched on outer ring X 4 BC1
344286 Double row cylindrical roller bearings, thrust ball bearings and cylindrical roller thrust bearings, 4 BC2; BD; BE;
radial and axial runout BG
344288 Radial deep groove ball bearings, sets of 6004/C3 + 6004 N/C3 and 6004/P63 + 6004N/P63, 4 BB
snap ring groove outside
344292 Radial cylindrical roller bearings with angle rings for traction motors (SKF Canada) X 4 BC1
344293 Radial deep groove ball bearings 6203 to 6206, reduced radial clearance 4 BB1
344294 Radial deep groove ball bearings 16115/P6, 6214/P5, cage riveting without burrs, special 3, 4 BB1
inspection to this effect (SKF Clamart)
344295 Balls Balls treated with MoS2
344297 Radial spherical roller bearings 22312 M/C4S1W run in for grease tests in R2F (DIN 51806) X 4 BS2
344298 Radial cylindrical roller bearings RN 2308 MB, paired X 4 BC
344299 Radial angular contact ball bearings 3207 AN, special tolerances, C2 axial internal clearance 4 BA2
344300 Radial deep groove ball bearings 2Z or 2RS, Esso Beacon M 285, 50 - 60 % fill X 4 BB1
344301 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Fuchs, V-Grease 7200/22 4 BB1
344302 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Shell Grease S 4100 4 BB1
344306 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Mobil grease high temperature 4 BB1
344312 Radial deep groove ball bearings Z, 2Z, RS, 2RS, Darina 2 (MT 59) 2.4 - 2.9 g 4 BB1
344315 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Mobil grease 2 4 BB1
344319 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, Calypsol H441 B-GF with 30 % Grease 4 BB1
Toluol-Dispersion
344320 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Klüber 'Fliessfett' KR 28 HDMF X 4 BB1
344323 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, 50 - 60 % Mobilgrease 24 X 4 BB1
(Replaced by VT166)
344324 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, Shell V-Grease 3817 (MT 41) 4 BB1
344325 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, Silicon-Grease DC 44, light 4 BB1
344326 Radial deep groove ball bearings, Z, 2Z, RS, 2RS, grease Molislip MP, light 4 BB1
344400 Radial deep groove ball bearings and magneto type bearings with reduced tolerances for 4 BB1; BBE
dimensions, geometry and run-out (Cannstatt)
344404 Radial cylindrical roller bearings without inner ring, roller enveloping diameter in 2 classes X 4 BC1
344409 Radial deep groove ball bearings 624, C2 and noise tested 4 BB1
344411 Radial deep groove ball bearings 393214, permissible axial internal clearance 0,08 mm X 4 BB1
344415 Radial deep groove ball bearings, reduced dimensional accuracy, C2, noise tested 4 BB1
344420 Radial deep groove ball bearings, 10 - 20 % Shell V 3817 4 BB1
344421 Radial deep groove ball bearings 634, matching of rings and balls 4 BB1
344423 Radial cylindrical roller bearings RNU 312 CYA, polished flanges and cage O.Ds. 1, 3 BC1
344425 Radial deep groove ball bearings 6000, accuracy and noise testing specification 4 BB1
344426 Radil cylindrical roller bearings NUP or NUPJ 309 NM, NUP or NUPJ 309 EN/C3, 4 BC1
mounting instructions
344427 Radial deep groove ball bearings 6003-Z/P63 and 6003-RS/P63, paired mounting 4 BB1
344428 Radial deep groove ball bearings 608, radial clearance 2 to 6 µm, noise tested 4 BB1
344429 Radial deep groove ball bearings 6001/C3, 6002/C3, 6201/C3, 6202/C3 preserved with 4 BB1
Esso Rust Ban 339
344431 Radial self-aligning ball bearings 2200, axial internal clearance to order 4 BJ2
344432 Double row radial cylindrical roller bearings without inner ring RNU 4906 B, RNU 4907 B, X 4 BC2
enveloping diameter in 2 classes
344433 Radial cylindrical roller bearings NU 1014 MA + inner rings LNU 1014 when inner rings 4 BC1
exchanged radial clearance of 40 to 60 µm always obtained
344434 Radial cylindrical roller bearings NU 2202, outer rings, material and machining specification 4 BC1
344435 Radial deep groove ball bearings 624-2Z, noise tested, lubricated with one drop 4 BB1
Etsyntha Silber B oil
344436 Spindle roller bearings', single row cylindrical roller bearings I-82005, I-82006, I-82007 4 BC1
344437 Radial deep groove ball bearings, Cannstatt manufacture, grease Calypsol H 729-GF, 10 - 20 % X 4 BB1
344439 Radial cylindrical roller bearings, pressed steel cages X 3 BC1
344440 Radial deep groove ball bearings, radial internal clearance 1 to 6 µm, Calypsol H 729-GF, 4 BB1
10 - 20 %
344442 Radial deep groove ball bearings 600-2Z, P6E, C2 LHT42 (Repl by EP1C2LHT42) X 4 BB1
344443 Radial deep groove ball bearings, Cannstatt manufacture, radial internal clearance 1 to 5 µm X 4 BB1
344444 Radial magneto bearings, class P4 4 BBE
344445 Radial magneto bearings, class P5 X 4 BBE
344446 Radial magneto bearings, class P6 X 4 BBE
344447 Radial deep groove ball bearings, Cannstatt manufacture, low friction X 4 BB1
344448 Radial deep groove ball bearing. Special bore tolerances 4 BB1
344449 Radial deep groove ball baerings, Cannstatt manufacture. Replaced by Q66 X 4 BB1
344450 Radial deep groove ball bearings, Cannstatt manufacture, Klüber TK 44 N (medium) X 4 BB1
344451 Radial deep groove ball bearings 623, 624, 625, 626, 6000, X 4 BB1
Klüber Isoflex LDS 18 Special A-grease, 15 to 20 % dispersion TC, smooth running test
344452 Radial deep groove ball bearings, grease packing 4 BB1
344453 Radial deep groove ball bearings with TN and TN9 cages, packaging specification 4 BB1
344454 Radial deep groove ball bearings, Bosch Ft1 v 26 Grease X 4 BB1
344455 Radial needle roller and cage assemblies with cages to 'STAR' specification 3 BN
344457 Radial deep groove ball bearings, Cannstatt manufacture, Klüber Barrierta IS, 70 - 100 % X 4 BB1
(Repl by VT119C)
344458 Magneto bearings, radial internal clearance 35 to 50 µm X 4 BBE
344459 Radial deep groove ball bearings, Cannstatt manufacture, grease specification X 4 BB1
(Replaced by standard)
344460 Drawn cup needle roller bearings with open and closed ends, reduced F8 tolerance X 4 BND
344461 Radial deep groove ball bearings, Cannstatt manufacture, grease specification (Repl. by LHT22) X 4 BB1
344462 Radial deep groove ball bearings, bore sorted in 2 µm grades 4 BB1
344464 Radial deep groove ball bearings, Klüber Isoflex NBU 15, 25 % dispersion X 4 BB1
344465 Radial deep groove ball bearings, grease specification (Repl. by LHT22) X 4 BB1
344466 Radial deep groove ball baerings, Klüber Isoflex PDB 38/CX 1000 4 BB1
344467 Radial magneto bearings, radial internal clearance 20 to 40 µm outer rings not interchangeable 4 BBE
344469 Needle and cylindrical roller and cage assemblies, Isoflex LDS 18 Special A (Dispersion) X 4 BC; BN
344470 Rolling bearings Rolling bearings and components, competitor manufacture, package marking with competitor 4 Any
designation
344471 Radial deep groove ball bearings, 6302-Z with special preservative X 4 BB1
344473 Radial deep groove ball bearings 6202, special grease quantities and packing (MT62C) X 4 BB1
344474 Radial deep groove ball bearings, 6201-2RS4/C3B214 with Shell S 7189 (0,6 to 0,8 g) X 4 BB1
(Repl. by HT42B)
344476 Drawn cup needle roller bearings with open and closed ends, greased between cage and X 4 BND
raceway (Retinax A)

6
344500 Radial spherical roller bearings I-112606 B/W33, P6, run-in, torque measured, bearings X 4 BS2
consecutively numbered
344501 Radial taper roller bearings 31315, C8A, torque measured 100 % (Replaced by /CL7A) X 4 BT1
344502 Radial double-row angular contact ball bearings, reduced axial internal clearance 4 BA2
344503 Balls and rollers Rolling elements 100 % crack tested
344504 Rollers Spherical rollers, Cr Ni case hardening steel (vacuum remelted), 100 % crack tested 4
344505 Radial cylindrical roller bearings with annular groove and pressed steel cage X 4 BC
(notice cage position) (Replaced by VM012)
344506 Radial bearings Radial bearings with riveted brass cages with brass rivets only X 3 Any
344507 Radial bearings 4 matched radial bearings (Replaced by QR) X 4 Any
344508 Radial spherical plain bearings, axial as well as radial internal clearance to be checked, for X 4 BLR
aircraft industry
344508A Radial spherical plain bearings with bright surfaces and reduced axial clearance for X 4 BLR
aircraft industry
344510 Rolling bearings Rolling bearings with reduced outer ring width, package marked with customers part No. (Opel) X 4 Any
344511 Radial deep groove ball bearings with reduced inner ring width (Opel) X 4 BB1
(Repl. by 6206-ZN/C3/362032)
344512 Radial angular contact ball bearings 3318 DM, axial internal clearance 70 to 120 µm X 4 BA2
344513 Radial spherical roller bearings 240/630 CB, inner ring P5, radial clearance C2 (Repl. by C22) X 4 BS2
344515 Double row radial cylindrical roller bearings NNU 49 K with roughground inner ring raceway X 4 BC2
344516 Radial deep groove ball bearings 6244 MA/C4, balls to 344199 1 BB1
344517 Radial deep groove ball bearings 6306-2Z, shield mounting X 2 BB1
344518 Radial double row deep groove ball bearings 4200, outer ring radial runout 6 µm, reduced X 4 BB2
O.D. tolerance (SKF-Zürich)
344519 (High performance) Maintenance-free spherical plain bearings but without shields 2 BL
344520 Radial cylindrical roller bearings, special requirements (SNCF) X 4 BC1
344521 Radial cylindrical roller bearings, LPS cage, 'soft' electrolytic oxidation 3 BC1
344523 Four-point contact ball bearings QJ 310, axial internal clearance 110 to 130 µm 4 BDQ
344524 Four-point contact ball bearings, axial internal clearance, balls to 344526 2, 4 BDQ
344526 Balls Balls, SO and ultrasonically tested X
344527 Radial cylindrical roller bearings with snap ring groove and pressed steel cage, cage prongs X 2 BC
on same side as groove (Repl. by 344243)
344529 Radial cylindrical roller bearings RN 2305 V with safety device for transport, SKF-Göteborg X 4 BC1
344530 Radial cylindrical roller bearings, radial clearance X 4 BC1
344532 Radial double row angular contact ball bearings 3305 D, axial internal clearance 50 to 70 µm, X 4 BA2
reduced width tolerance
344533 Radial spherical roller bearings 23152 CK/C5, inner ring radial runout max. 13 µm 4 BS2
(SKF-Bruxelles)
344535 Radial spherical roller bearings, max. 0,05 mm difference between planes of end faces of inner 4 BS2
and outer rings when these are in their central position under purely radial load
344536 5 matched radial bearings X 4
344537 Series GEZ-ES Radial spherical plain bearings, series GEZ..ES (inch), 100 % crack tested, max. loads given 4 BLR
4 Bearings with parts of Parts concerned: OR + IR + Rx, Outer ring plus inner ring plus rolling element 4 Any
material other than normal
and/or with parts specially
hardened
4 Machine tool spindle units Lubrication: oil jet
40 Machine tool spindle units Spindle nose design: grinding spindle nose to DIN 6375
4L NICE Series Greased bearings 4 BB1
5 Bearings with parts of Part concerned: Rx = rolling element 4 Any
material other than normal
and/or with parts specially
hardened
6 Bearings with parts of Part concerned: OR + Rx = outer ring plus rolling element 4 Any
material other than normal
and/or with parts specially
hardened
7 Bearings with parts of Parts concerned: IR + Rx = inner ring plus rolling element 4 Any
material other than normal
and/or with parts specially
hardened
8 Bearings with parts of Part concerned: Cx = cage 4 Any
material other than normal
and/or with parts specially
hardened
8H Hubs Hydraulic brake (8 inches)
9 Bearings with parts of Part concerned: Other part (than 0 to 8) 4 Any
material other than normal
and/or with parts specially
hardened
A Adapter sleeves Thread standard altered from withworth to metric X
Size 0 to 13
A Adapter sleeves Locking device changed from MS to MB X
Size 44 to 56
A Series BNA and RBNA Design corresponding to Bremen series 1 BNK
A Series CFL, CFM, CRL Increased carrying capacity, i.e. larger size rollers and increased number of rollers. 1 BC1
and CRM
A Series CF, CK and KP ADR series 1 BBF; BJ2
A Series NJ 2, NU 2, etc. Increased thrust carrying capacity. Nominal flange incline 1º40' and rollers with sphered ends. 1 BC1
A Series GE etc. Spherical plain bearings. Axially split two-piece outer ring 2 BL
A Series HMV Hydraulic nuts X
A Series HNA and RHNA Design corresponding to Bremen series 1 BND
A Locking device Changed from nut with locking plate and screw, type MS, to nut with locking washer type MB X
A Locking device MB locking washer with increased plate thickness
A Lubricants for rolling Bearing filling : less grease than standard filling X 4 Any
bearings
A Serie N 10 Cage and rollers from Series NN 30 TN X 1 BC1
A Serie NATD Design corresponding to INA series NATR BNT
A Serie N 30 Diameter over rollers on the upper tolerance limit 1 BC1
A Serie NN 30 Improved waviness on bore diameter, outer diameter and raceways diameters. 1 BC2
A Series NNA 69 and Design corresponding to series SNK(I). Loose snap ring flanges etc. 1 BN2
RNNA 69
A Bushing, series PG Glyco series. Lining surface of Polyacetol X 2 BPG
A Tapered rollers Roller shape: Modified large end face radius 4
A Inch size Suffix for thrust bearings. Modified bore diameter 2 BF
A Y-bearing units Bearing and housing are of the next smaller basic size than that to which a given shaft
diameter was originally assigned
A Series WA 1, WA 2 Roller assemblies. Modified cage design 3 BN
A Only rings to Series Rings recessed for seals. Internal design equal to series 12 and 13 respectively. 1 BJ2
22 and 23 Only used for component designation

7
A Series 22 Open bearing, internal design to E-2RS, i.e. recesses in outer and inner ring. 1 BJ2
('lower' capacity compared to standard E)
A Series 2 and 3 To 'MRC' internal bearing design 1 BBF
A Series 29 Ball size and number of balls changed 1 BD1
A Only parts for Series 60, New generation, parts designation 1 BB1
62 and 63
A Series 295 SKF Industries. Increased osculation between housing washer and rollers 1 BHS
A Series 3194(00) A in (A)DA for Series NNF 50. Wider snap ring grooves on outer ring 2 BC2
A Series 32, 33 Without filling slot 2 BA2
A Series 42, 43 Without filling slot 2 BB2
A Series 4762(00)(xxx) Inner rings of larger sections, case hardened. 1 BS2
A Series 52, 53 and 54 Without filling slot 2 BA2
A Series 511, 512, 513, Old RIV-SKF design. Ball set different from normal 1 BD1
514, 532, 533 and 534
A Series 522, 523, 524, Old RIV-SKF design. Ball set different from normal 1 BE2
542, 543 and 544
A Series 70, 708, 718, Contact angle 30º 1 BA1
719, 72 and 73
A New Departure, prefix G BA2; BB1;
BRU
A Hydrostatic shoe bearing HSBB, adjustable
A Shaft end feature to JIS D9403 2 BAC
A Rivets Flat rivets for RIV-SKF J1 design cage 4
A Ball and roller screw assemblies, screw shaft threaded along its length and
annealed at one or both ends
A Cover set for 'shaft end' SBD housing
A1 Series 72, 73 Contact angle 30º. Outer ring separable 1, 2 BA1
A1, A2, Tubearing position on shaft 2 BAC
A101 Hydraulic nuts HMVA - unthreaded
A102 Nuts Nuts except hydraulic nuts - unthreaded
A103 Radial bearings Inner and outer rings for taper roller bearings, outer rings for other radial bearings - turned, 4
hardened, A46 Marking instructions
A104 Deep groove ball bearings to take seals or shields - rings unmarked, without shields or seals, X 4 BB1
ungreased, dipped in preservative
A105 Deep groove ball bearings to take seals or shields - without shields or seals, ungreased, X 4 BB1
dipped in preservative
A106 Series RNNU 69 Cylindrical roller bearing series RNNU 69, with fewer rollers having increased length X 4 BC2
(Repl. by RNNU 69 BV)
A107 Series 4792(00) Y-bearings, Series 4792(00), with shields at both sides but without locking collar and screws X 4 BBY
A108 Series 4792(00) Y-bearings, Series 4792(00), without locking collar and screws (Repl. by Suffix U) X 4 BBY
A11 Cylindrical rollers Cylindrical rollers - transition between cylindrical outside surface and chamfers blended 4
A111 Inner and outer rings Inner and outer ring for deep groove ball bearings and self aligning ball bearings, outer rings for X 4 BB1; BJ2;
spherical roller bearings - transition between outside diamtere or bore diameter and chamfers BS2
A112 blended
A111 + A80 X 4 BS2
A113 A111 + A42 X 4 BB1
A12 Adapter sleeves Adapter sleeves with the bore turned only, not split, unslottet, with locating groove for locking X
washer or nut washer but supplied without washer
A121 Taper roller bearings - inner ring with crowned and honed raceways (Repl. by Normal) X 4 BT1
A122 Series 4792(00)-(000) Y-bearings, series 4792(00)-(000) with seals type RSl (Repl. by Normal) X 4 BBY
A123 Inner rings Inner rings for radial bearings with unpolished raceways + A46 4
A124 Inner rings Inner rings for radial bearings, turned only, unmarked + A46 4
A125 Outer rings Outer rings for radial bearings, turned only, unmarked + A46 4
A126 Outer rings Outer rings for radial bearings with unpolished raceways + A46 4
A127 Inner rings Inner rings for radial bearings with unground tracks + A46 4
A128 Outer rings Outer rings for radial bearings, turned only + A46, marking instructions 4
A129 Inner rings Inner rings for taper roller bearings, with unpolished raceways and flanges + A46, 4 BT1
marking instructions
A13 Spherical roller bearings with two-piece outer ring (CP), machined cage, without guide ring X 4 BS2
A131 Inner rings Inner rings for taper roller bearings, with unground raceways and flanges + A46, 4 BT1
marking instructions
A132 Rings Rings for radial bearings, machined up to and including side face grinding + A46 X 4
A133 Rings Rings for radial bearings, finish ground on side faces and up to and including outside diameter 4
plus A46
A134 Inner rings Inner rings for taper roller bearings - unground raceways and flanges + A46 4 BT1
A135 Rings Rings for radial bearings, unmarked, finish ground up to and including outside diameter, 4
closer width tolerances plus A46
A136 Rings Rings for radial bearings, unmarked, finish ground up to and including side face, closer width 4
tolerance + A46
A137 Inner rings Inner rings for radial bearings, with raceways unpolished and bore unground + A46 4
A138 Inner rings Inner rings for radial bearings with the raceways and flanges unpolished and the bore 1, 2 BT1
unground + A46
A139 Tapered rollers Taper rollers with raceway and large end face ground + A46
A14 Spherical roller bearings for vibrating screens, C design, machined cage and clearance C4 X 4 BS2
(Repl. by A15)
A141 Spherical roller bearings type CAB. Cage with wear and spring washers 4 BS2
A142 Spherical roller bearings without lubrication groove and holes in outer ring (i.e. not W20, not W33) X 4 BS2
A15 Spherical roller bearings for vibrating screens X 4 BS2
A16 Cylindrical roller bearings - inclined flanges, fully crowned or B chamfered rollers and with X 4 BC1
sphered roller ends
A2 Series 72, 73 Contact angle 30º. Separable in three parts 1, 2 BA1
A20 Spherical roller bearings with tapered bore (taper 1 : 12). Closer bore tolerance, measured X 4 BS2
from larger end
A201 Spherical roller bearings with the inner ring raceways microcentric ground, radial runout for X 4 BS2
inner ring closer ≈ C02 + A50
A202 Cylindrical rollers Cylindrical rollers, special grading tolerances for diameter, not sorted with regard to length + A46 4
A203 A201 + A50 + A80 X 4 BS2
A204 Taper roller bearings - friction torque tested + C8A X 4 BS2
A205 Taper roller bearings - the greatest thickness between bore and raceway of the inner ring X 4 BT1
marked with + on both sides. Cage phosphated and rollers A206
A206 Tapered rollers Taper rollers with special tolerances X 4
A207 Spherical roller thrust bearings with reduced deviation from plane parallelism between shaft X 4 BHS
washer and sleeve
A208 Single row angular contact ball bearings type BG, reduced distance between the side faces of X 4 BA1
outer and inner ring (Repl. by A218)
A209 Spherical roller bearing 22312 M (flange design), radial clearance C4, stabilised Sl, honed, X 4 BS2
special inspection and marking instructions (test bearings for grease testing machine R 2 F)
A21 Taper roller bearings, closer tolerances for inner ring width X 4 BT1
A211 Spherical roller bearings, special surface finish for outer and inner ring raceways, rollers A212 X 4 BS2
(Repl. by Normal)
A212 Spherical rollers Spherical rollers with special surface finish for raceway (Repl. by Normal) X 4

8
A213 A211 + A80 (Repl. by A211) X 4 BS2
A216 Tapered rollers Taper rollers with special waviness tolerances for raceway and large end 4
A218 Single row angular contact ball bearings type BG, with extra reduced distance between the X 4 BA1
side faces of outer and inner rings
A219 Spherical roller bearings with the radial runout for the inner ring closer than normal + A50 4 BS2
A22 A23 + A80 (Repl. by A23) X 4 BS2
A221 Spherical roller bearings, C421, rollers A222 4 BS2
A222 Spherical rollers Spherical rollers. Guarantee tolerance on the sorting groups closer than normal 4
A225 Cylindrical roller bearings series NN 30 K/SP with the half cone angle 2º25' 4 BC2
A23 Spherical roller bearings with special width tolerance 4 BS2
A24 Pressed cages Pressed cages (Y and J) for spherical roller bearings with special bore tolerance 4
A25 Cylindrical rollers Cylindrical rollers with special surface finish on the B-chamfers 4
A251 Cylindrical rollers Cylindrical rollers with special surface finish on the B-chamfers and special end chamfer X 4 BC
A301 Cylindrical roller bearing series NN 30 K with radial clearance closer than normal X 4 BC2
A302 Deep groove ball bearings d ≤ 95 mm. Intended for operating temperature of 100º - 300º C, X 4 BB1
special radial clearance. Molybdenum disulphide treated
A303 Cylindrical roller bearings series NN 30 K with special radial clearance X 4 BC2
A304 Self aligning ball bearing with radial clearance > C5 4 BJ2
A305 Deep groove ball bearings - preloaded (negative clearance) 4 BB1
A306 Cylindrical roller bearings NN 30 K with special radial clearance, outer and inner rings X 4 BC2
ultrasonically tested
A307 Deep groove ball bearings - preloaded (negative clearance), paired with balls + 50 µm X 4 BB1
A308 Cylindrical roller bearings NN 3060 K, outer and inner rings stabilised Sl, special radial clearance 4 BC2
A309 Deep groove ball bearings d = 100 mm radial clearance ≈ 4 x C5 4 BB1
A31 Radial bearings Radial bearings, radial clearance lower halfo of C2 (Repl. by C2L) X 4
A311 Spherical roller bearings with tapered bore, radial clearance > C5 4 BS2
A312 Radial bearings Radial bearings with case hardened inner ring and radial clearance upper half of C2 X 4
(Repl. by C2H)
A313 Radial bearings Radial bearings, radial clearance upper half of C4 + A40 (Repl. by C4HA40) X 4
A314 A309 + A401 4 BB1
A315 Spherical roller bearings, A201 + radial clearance lower half of C3 X 4 BS2
A316 Spherical roller bearings, W33 + A80 and with radial clearance value etched on inner ring X 4 BS2
A317 Spherical roller bearings, radial clearance value etched on inner ring X 4 BS2
A318 Spherical roller bearings, radial clearance lower half of C3 + A80 (Repl. by C3L) X 4 BS2
A319 Radial bearings Radial bearings, radial clearance upper half of C2 (Repl. by C2H) X 4
A32 Spherical roller bearings with tapered bore, radial clearance < C2 (Repl. by C1) X 4 BS2
A321 Spherical roller bearings, radial clearance lower half of C3 (Repl. by C3L) X 4 BS2
A322 Spherical roller bearings, radial clearance upper half of C3 (Repl. by C3H) X 4 BS2
A323 Spherical roller bearings, radial clearance upper half of C5 (Repl. by C5H) X 4 BS2
A33 Single row ball bearings, friction torque tested 4 BB1
A40 Bearings with outside diameter of the outer ring dry lubricated with molybdenum disulphide X 4 Any
A401 Bearings dry lubricated with graphite X 4 Any
A402 Bearings dry lubricated with molybdenum disulphide X 4 Any
A403 Spherical roller bearings, A404 + VX603 X 4 BS2
A404 Bearings dry lubricated with molybdenum disulphide (Molykote pasta U) X 4 Any
A405 Double row cylindrical roller bearings, lubricated with grease Molub Alloy BRB 572/Code 850 4 BC2
A406 Double row cylindrical roller bearings. Lubricated with grease Esso Beacon 2 GB 4 BC2
A41 Rolling bearings Rolling bearings - tropical pack (Repl. by Packing code) X 4 Any
A411 Double row cylindrical roller bearings, without seals, cold slushed 4 BC2
A412 Radial bearings Inner and outer rings, unmarked, skin bulk packed 4
A413 Spherical roller bearings, A141 + specially packed in wooden case 4 BS2
A42 Single row deep groove ball bearings, packed in plastic bags and boxes (Repl. by Packing code) X 4 BB1
A43 Rolling bearings Rolling bearings packed in rolls, wrapped in parchemnt paper in customers 'pallet and frame' , X 4
(Repl. by Packing code)
A431 Rolling bearings Rolling bearings packed in customers 'pallet and frame' and with parchment paper round each X 4
bearing (Repl. by Packing code)
A44 Rolling bearings Rolling bearings packed in SKF casettes and customers 'pallet and frame' X 4
(Repl. by Packing code)
A441 Rolling bearings Rolling bearings with parchment paper round each bearing packed in SKF casettes and X 4
customers 'pallet and frame' (Repl. by packing code)
A45 New Departure, prefix G BB1
A45 Rolling bearings and Bearings and accessories in rolls wrapped in parchment paper, packed in SKF casettes X 4
accessories (Repl. by Packing code)
A451 Rolling bearings Rolling bearings packed in SKF casettes in SKF 'pallet and frame' (Repl. by Packing code) X 4
A46 Any components Components, inspected, slushed and packed for delivery to customers 4
A50 Radial roller bearings Radial roller bearings with the greatest thickness between bore and raceways of the inner X 4
ring, marked with + on the marking side (Repl. by W4)
A501 Spherical roller bearings, A32 + A50 (Repl. by C1W4) X 4 BS2
A502 Spherical roller bearings - radial clearance C1, Dm value of the outer ring marked on the box X 4 BS2
plus A50
A51 Bushing Sintered bronze material 4 BP
A51 Sleeves Sleeves, with the smallest thickness between bore and taper marked with - on the marking side
A52 Cages Preriveted cagesfor special assembling X 3 BB1
A521 Deep groove ball bearings, paired back-to-back 4 BB2
A522 Deep groove ball bearings, paired back-to-back 4 BB2
A523 Single row angular contact ball bearings paired face-to-face X 4 BA2
A553 Rollers 100% ultrasonicchecking alt. inductive plus optical checking X 4
A555 Cylindrical rollers Special quality checking X 4
A556 Bearing without shields and locking ring X 4 BBY
A601 Cylindrical roller bearings with sand blasted cage 4 BC1
A602 Spherical roller bearings, with pickled cage, bearing run-in 4 BS2
A603 Spherical roller bearings, with pickled cage 4 BS2
A701 Spherical roller bearings 22311, radial clearance C5, finished inner and outer rings stabilised 4 BS2
for max. 350º C + A401
A702 Deep groove ball bearings radial clearance ≈ 4 x C5, finished inner and outer rings stabilised X 4 BB1
for operating temperature of 100º - 300º C, molybdenum disulphide treated
A703 Deep groove ball bearings stabilised for operating temperature of 100º - 300º C 4 BB1
A704 Deep groove ball bearings, stabilised for operating temperature of 100º - 300º C. X 4 BB1
Molybdenum disulphide treated
A705 Deep groove ball bearings, radial clearance ≈ 4 x C5, finished inner rings stabilised for X 4 BB1
operating temperature of 100º - 300ºC + A401 (Repl. by VA201)
A706 Spherical roller bearings d ≤ 90 mm, radial clearance C5, finished inner and outer rings X 4 BS2
stabilised for operating temperature of 100º - 300º C + A401
A707 Self-aligning ball bearings, radial clearance 200 - 250 µm + A401 4 BJ2
A708 Radial bearings Radial bearings, finished inner and outer rings stabilised for operating temperature of 250º C, S2 4
A709 Spherical roller bearings d ≤ 90 mm, radial clearance C5, stabilised for operating X 4 BS2
temperature of +100º - +300º C plus A401 plus VX603
A80 Spherical roller bearings, case hardened inner ring (Repl. by Normal) X 4 BS2
A801 Deep groove ball bearings, cage of DELRIN X 4 BB1

9
A802 Cages Cage for roller bearings, nitrided (Repl. by VX603) X 3
A81 A40 + A80 (Repl. by A40) X 4 BS2
A82 Spherical roller bearings, phosphated guide ring, material G82 X 4 BS2
A821 Spherical roller bearings, nitrided guide ring, material G82 X 4 BS2
A83 Spherical roller bearings, bainitic hardened inner ring X 4 BS2
A85 Rolling bearings Rolling bearings. Inner and outer rings of material SKF 21 VA X 4
A851 Spherical roller bearings, inner rings made of case hardened vacuum remelted steel X 4 BS2
A86 Spherical roller bearings, inner and outer rings bainitic hardened X 4 BS2
A88 Spherical roller bearings, phosphated guide ring, material G88 X 4 BS2
A901 Spherical roller bearings, SO + W20 with one mark ground on both side faces of the outer X 4 BS2
ring, to show position of the lubricating holes
A902 Cages Cages for taper roller bearings, prongs not bent out and small end pocket not expanded X 3
A903 Cylindrical roller bearings, rollers ultrasonically tested X 4 BC1
A904 Cages Plastic cages type TN for deep groove ball bearings to UP specification 3
A905 Rings Rings for radial bearings, unmarked + A46 X 4
A906 Spherical roller bearings with modified rollers 4 BS2
A907 Rolling bearings Defect rolling bearings, normally scrapped but used for uncomplicated arrangements 4
A908 Balls Balls of class V or VI from reject or rework stores 4
A909 Deep groove ball bearings, marked with trade mark 'Steyr' X 4 BB1
A91 Adapter sleeves Adapter sleeves, sleeve and nut unmarked
A911 Spherical roller bearings. Inner, outer rings and rollers ultrasonically tested before assembly X 4 BS2
AA New Departure, prefix G BBW
AB New Departure, prefix G BBW
AB Bushing, series PG Lining surface of Polyacetol. Undersized bore X 2 BPG
AB Inch Series ALS, AMS Contact angle = 20º 1 BA1
AC Series 70, 719, 72 Contact angle = 25º 1 BA1
AC Series 32, 33 Contact angle = 15º, without filling slot 1, 2 BA2
AC Prefix K Suffix for taper roller thrust bearings BF
AC1 Series 72 Contact angle = 25º and separable outer ring 1 BA1
ACD Series 70, 719, 72 Contact angle = 25º 1 BA1
ACE Series 70, 719 Contact angle 25º 'High speed design' 1 BA1
ACX Series 70, 719, 72 Contact angle = 25º with modified internal design (non SKF) 1 BA1
AD Tapered rollers Roller shape: Modified large and face radius; dimple. (A + D) 4
ADA Series NNF 50 Two-piece inner ring. Modified internal and external design, wider snap ring grooves in 1, 2 BC2
outer ring
ADB Series NNF 50 Two-piece inner ring. Modified internal and external design, wider snap ring grooves in 1, 2 BC2
outer ring, modified internal and sealing design
AE Series 72, 73 Contact angle 30º. Increased carrying capacity. Larger size balls. Increased number of balls. 1 BA1
AE1 Series 72, 73 Contact angle 30º. Increased carrying capacity. Larger size balls. Increased number of balls. 1 BA1
Separable outer ring.
AF Plummer blocks Shaft end, locating bearing
AH Y-Bearings and units Special aligning torque, anti rotation pin and grease GMA (Air handling) 4 BBY
AL Plummer blocks Shaft end, non-locating bearing
AP Plummer blocks Shaft end, both bearing locating
AR New Departure, prefix G BB1
AS Inch size Thrust bearings BT1
AS. INA series Lubricating hole(s) in outer ring (e.g. HK 1516 AS1). The figure following AS indicates the number of holes BN
ASR. INA series Lubricating hole(s) and groove in outer ring BN
AW Series 52, 53, 54 Contact angle converges towards bearing axis 1 BA2
AX Inch size Thrust bearings BT1
B Slotted outer ring. With Series GEC equal to injection moulded antifriction lining in outer ring X 2 BL
B Series GEC Injection moulded antifriction lining in outer ring 1 BL
B Bushing Sliding material, PTFE with lead for composite plain bearings 2 BP
B Series HNA and RHNA Cup of thicker pressed steel 4 BND
B Series NNU 49 Reinforced cage 3 BN2
B Series NU 49, RNU 49 Rollers with slightly sphered ends (chamfer B, RC-L) 4 BN1
B Series 222, 223, 231, 232 Flange design. Increased carrying capacity X 4 BS2
B Series 292, 293, 294 Pressed cage. No cage guiding ring. Modified shaft washer 1 BHS
B Series 293, 294 US made : Increased osculation between housing washer and rollers X 4 BHS
B Series 322, 323 Increased contact angle and adapted modification of internal design 1 BT1
B Series 33 Old design, balls and contact angle different from standard 1 BA2
B Series 42 Cage and balls from series 22 1 BB2
B Series 511, 512, 514 (Altered IS) Increased carrying capacity and modification of internal design 1 BD1
B Series 60, 62, 63 Modified ball set and adapted ring raceways 1 BB1
B Series 70, 719, 72, 73, 74 Contact angle 40º 1 BA1
B ADR series: AX-B, BX-B, RB, X-B, Y-B, W 60 B, W62 B, W63 B, 60 B, 62 B, 63 B. X 1, 2 BA1
Angular contact ball bearings. Contact angle 15º. Separable inner ring (Compare SKF CC)
B Full complement bearings. Rollers black oxidized 4 BC1
B Angle ring For cylindrical roller bearings. Reduced overlap width 4
B Shaft end feature to ISO 6695 2 BAC
B Series KP ADR 1 BA
B Lubricants for rolling Bearing filling : more grease than standard filling X 4 Any
bearings
B Inch size Prefix K: 1. Integral external flange on cup, or 2. Suffix for thrust bearings 4 BT; BF
B RKS. Slewing rings Surface hardening of the teeth. Induction hardening of sides only 4 BV
B New Departure, prefix G BB1
B Cylindrical rollers Roller shape: B chamfer 4
B Needle rollers Roller shape: B chamfer 4
B Needle rollers, Roller shape: standard spherical end 4
inch sizes (Bremen)
B Spherical rollers Roller shape: Roller for new radial flange bearings, B-design! Assymetric raceway 4
B Tapered rollers Roller shape: Roller for bearings in 'B-design' 4
B Rivets Material other than normal: Brass 4
B HMV X
B Y-bearing units Bearing mounted backwards in flange unit (one piece housing)
B Adapter sleeves Withworth thread
B Sleeves Two oil connection ducts at the large end
B Cover set for 'through shaft' SBD housing and Y-bearing housing
B1 Series 72 Contact angle 40º. Outer ring separable 1, 2 BA1
B10 Radial deep groove ball bearings with shields of LZ design X 4 BB1
B101 Rolling bearings Rolling bearings with special cage X 4
B103 Rolling bearing rings Rolling bearing rings, finished except raceway 4
B11 Radial deep groove ball bearings with shields or seals according to Interchange Standard X 4 BB1
B112 Radial deep groove ball bearings, Cannstatt manufacture with shields or seals 4 BB1
B113 Bearing 6308 with special chamfer X 4 BB1
B12 Radial deep groove ball bearings with shields or seals according to RSl design of SKF Clamart X 4 BB1
B140 Thrust bearings with 2 shaft washers (Repl. by DS) X 4 BD1
B141 Thrust bearings with 2 housings washers X 4 BD1

10
B142 Thrust bearings without shaft washer X 4 BD1
B143 Thrust bearings without housing washer X 4 BD1
B150 Adapter sleeves Special oil connection X
B151 Adapter sleeves Special oil connection X
B152 Adapter sleeves Special oil connection X
B153 Adapter sleeves Special oil connection X
B160 Adapter sleeves Special oil connection X
B161 Adapter sleeves Special oil connection X
B162 Adapter sleeves Special oil connection
B163 Adapter sleeves Special oil connection
B181 Rolling bearings Rolling bearings, bore of bearing inner ring non-ground X 4
B182 Enlarged tolerances on inner ring 4 BL
B190 Balls Ball blanks, blanks deburred 4
B191 Rolling elements Rolling elements after hardening. (Repl. by RQ) X 4
B20 Rolling bearings Bearings for power transmissions 4
B201 Radial taper roller bearings 31313 J2, total bearing width 0 to 100 µm. (Repl. by U4) X 4 BT1
B202 Radial tapered roller bearings, P5 but with reduced radial runout X 4 BT1
B203 Rolling bearings Rolling bearings, P6 but with reduced O.D. tolerance and reduced radial run-out of inner ring 4
B204 Radial cylindrical roller bearings width tolerance 000 to -20 µm. (Repl. by VQ112/VQ114) X 4 BC1
B205 Radial deep groove ball bearings with balls according to specification 344199 4 BB1
B207 Radial deep groove ball bearings, Larger internal tolerances. X 4 BB1
B208 Drawn cup needle roller bearings, open and closed ends, 2 groupings of diameter under the rollers X 4 BND
B209 Drawn cup needle roller bearings, open and closed ends, 3 groupings of diameter under the rollers X 4 BND
B21 Radial rolling bearings Radial rolling bearings, 3 groupings of bore diameter X 4
B210 Radial deep groove ball bearings of Cannstatt manufacture, special design (Repl. by C40 or C50) X 4 BB1
B211 As in B210 (Repl. by C20 or C30) X 4 BB1
B212 Bearing inner ring dimensions only according to P5 (Repl. by C20) X 4 BB1
B213 Special tolerances (P6E) X 4 BB1
B214 Radial deep groove ball bearings, reduced tolerances. X 4 BB1
B215 Radial deep groove ball bearings according to P62 E (Repl. by EP1) X 4 BB1
B216 Bearing outer ring dimensions only according to P5 (Repl. by C40) X 4 BB1
B217 Radial deep groove ball bearings, special grinding tolerance and special final inspection of X 4 BB1
parts (Repl. by EP1)
B218 Radial deep groove ball bearings according to P6E (Repl. by EP1) X 4 BB1
B219 Radial deep groove ball bearings according to P6, radial run-out 4µm (Repl. by P6) X 4 BB1
B22 Tapered rollers Tapered rollers according to FORD specification X 4
B220 Tapered rollers Tapered rollers to class III but special dimensions to class II 4
B221 Radial tapered roller bearings with rollers of class III B X 4 BT1
B222 Radial tapered roller bearings with rollers class II B X 4 BT1
B223 Radial tapered roller bearings with rollers class II C X 4 BT1
B224 Tapered rollers Tapered rollers, special tolerances 4
B225 Tapered rollers Tapered rollers, special tolerances 4
B226 Tapered rollers Tapered rollers to class III C but special dimensions to class II C X 4
B227 Needle rollers Bearing needle roller according to DIN 5402 4
B228 Balls Phosphated balls. (Replaced by B644) X 4
B23 Radial deep groove ball bearings, special manufacture and inspection (Repl. by EP1) X 4 BB1
B231 Radial deep groove ball bearings, shield position checked under axial load (Repl. by Normal) X 4 BB1
B241 Thrust ball bearings specially treated. Pressed cage X 4 BD
B242 Special radial cage tolerance X 4 BC1
B243 Radial cylindrical roller bearings to tolerance class SP, but with UP rollers. (Replaced by UP) 4 BC1
B251 Radial deep groove ball bearings 16007, special final inspection of parts X 4 BB1
B252 Radial deep groove ball bearings 16008, special final inspection of parts 4 BB1
B261 Radial spherical roller bearings 240/670 CBK30, bore dimension groupings 4 BS2
B262 Radial rolling bearings Radial rolling bearings, running accurancy of outer ring, according to P5 (Repl. by C03) X 4
B263 Radial rolling bearings, running accuracy of outer ring, according to P5 (Repl. by C04) X 4 BS2
B264 Radial rolling bearings Radial rolling bearings, O.D. tolerance range reduced by one half (Repl. by C50) X 4
B265 Radial rolling bearings Radial rolling bearings, running accuracy of inner ring according to P6 (Repl. by C01) X 4
B266 Radial rolling bearings Radial rolling bearings, dimensional and running accuracy according to P5 (Repl. by C22) X 4
B267 Radial cylindrical roller bearings assembly or sub assembly supplied with the radial clearance X 4 BC1
sub-division S
B268 Radial cylindrical roller bearings assembly or sub assembly supplied with the radial clearance 4 BC1; BN
sub-division T
B271 Radial rolling bearings Radial rolling bearings, running accuracy of inner ring according to P5 (Repl by C02) X 4
B274 Radial rolling bearings Radial rolling bearings, tolerance width of bore diameter reduced by one half (Repl. by C30) X 4
B281 Balls Special material and tolerances X 4
B282 Balls Balls for MAN Turbo Special material and tolerances X 4
B283 Balls Balls, tolerance specification X 4
B284 Balls Balls, sorting group tolerance X 4
B301 Radial rolling bearings Radial rolling bearings, actual radial or axial internal clearance values marked in addition to X 4
clearance suffix
B303 Radial cylindrical roller bearings radial clearnace 12 to 20 µm NA (non interchangeable) X 4 BC1; BC2
B304 Radial roller bearings Radial roller bearings with tapered bore, special internal radial clearance X 4
B31 Four point contact ball bearings QJ304 M, rings manufactured to specifications for C2, bearing 4 BDQ
axial internal clearance 40 to 70 µm
B311 Four point contact ball bearings QJ304 M, rings manufactured to specifications for C2, special X 4 BDQ
bearing axial internal clearance
B32 Radial rolling bearings Radial rolling bearings, radial clearance within the upper half of C2 (Repl. by C2H) X 4
B320 Radial rolling bearings Radial rolling bearings, radial internal clearance 2 x C5 X 4
B33 Radial deep groove ball bearings, radial internal clearance 4 to 8 µm, LHT42 grease X 4 BB1
(Repl. by C2 or P62)
B330 Radial deep groove ball bearings, radial internal clearance 5 to 10 µm at ± 150 N (15 kg) 4 BB1
B331 Radial deep groove ball bearing 6214, radial internal clearance 150 to 170 µm X 4 BB1
(Repl. by RALU2xC5)
B332 Radial deep groove ball bearing 6318, radial internal clearance 73 to 86 µm at ± 150 N (15 kg) X 4 BB1
Replaced by C4H
B333 Radial deep groove ball bearing 16100, radial internal clearance 7 to 12 µm, noise tested (GPR) X 4 BB1
B34 Angular contact ball bearing 3200 A, axial internal clearance 30 to 40 µm X 4 BA2
B340 Angular contact ball bearing 3306 D, axial internal clearance 11 to 22 µm 4 BA2
B35 Radial spherical roller bearing 23048 CK, radial clearance 420 to 450 µm, stabilised, Sl, X 4 BS2
WM067 (Repl. by C5)
B350 Radial spherical roller bearings with tapered bore (screen bearings). Special radial internal X 4 BS2
clearance
B360 Radial self-aligning ball bearings, radial internal clearance 200 to 250 µm 4 BJ2
B395 Radial tapered roller bearings with special run in procedure X 4 BT1
B4 Full complement bearings. Rollers and rings black oxidized 4 BC1
B401 Grease fill using MT59 X 4 BB1
B402 Grease fill using LHT42 X 4 BB1
B403 Radial deep groove ball bearings 6207-2RS/C3 grease fill using HT43 4 BB1
B404 Radial deep groove ball bearings, grease fill normal using Deganol PMD X 4 BB1

11
B405 Radial deep groove ball bearings, grease fill normal using Shell V 3896 X 4 BB1
B406 Bearing 6205-2Z grease fill using Shell FL 2 X 4 BB1
B407 Radial deep groove ball bearings, grease fill normal using Bardahl BS21 or Lubral LS21 X 4 BB1
B408 Radial deep groove ball bearings, grease fill normal using Silikon 535 green/medium X 4 BB1
B409 Radial deep groove ball bearings, grease fill using Klüber Staburags N12 X 4 BB1
B410 Radial deep groove ball bearings, grease fill, Klüber Staburags NBU4 X 4 BB1
B411 6004-2ZY/C3 No grease filling, preserved with Lubro X 4 BB1
B412 Radial deep groove ball bearings, grease fill normal using Calypsol H 443 HD 88 X 4 BB1
B413 Radial deep groove ball bearings, grease fill normal using Calypsol H 729-GF X 4 BB1
B414 Radial deep groove ball bearings, grease fill X 4 BB1
B415 Radial deep groove ball bearings, grease fill X 4 BB1
B416 Radial deep groove ball bearings, grease fill X 4 BB1
B417 Radial deep groove ball bearings, grease fill X 4 BB1
B418 Radial deep groove ball bearings, grease fill normal using Fuchs FWA 160 X 4 BB1
B419 Radial deep groove ball bearings, grease fill normal using Klüber BMTA300 X 4 BB1
B420 Bearings with one shield or seal, packaged in casettes with shield/seal towards top X 4 BB1
B421 Bearings with one shield or seal, packaged in casettes with shield/seal towards bottom X 4 BB1
(Repl. by Normal)
B423 Radial deep groove ball bearings, grease fill normal using Klüber RMTA X 4 BB1
B424 Radial deep groove ball bearings, grease fill normal using ESSO-Mehrzweck P X 4 BB1
B425 Radial deep groove ball bearings, grease fill, Calypsol H441 (Instrumentenfett M83) X 4 BB1
B426 Radial deep groove ball bearings, grease fill normal using Klüber Staburags NBU 12/300 KP 4 BB1
B427 Radial deep groove ball bearings, grease fill Calypsol WDT X 4 BB1
B428 Radial deep groove ball bearings, grease fill normal using Calypsol H 443 GF X 4 BB1
B429 Radial deep groove ball bearings, grease fill normal using Dow Corning FS-1292 X 4 BB1
B431 Radial deep groove ball bearings, grease fill normal using Prodhag R 25 X 4 BB1
B432 Radial deep groove ball bearings, grease fill normal using Klüber Isoflex NBU 15 X 4 BB1
B433 Radial deep groove ball bearings, grease fill normal using Klüber Staburags NBU 12 MF X 4 BB1
B434 Radial deep groove ball bearings, grease fill normal using Chevron OHT X 4 BB1
B435 Radial deep groove ball bearings, grease fill normal using Klüber Staburags N4 X 4 BB1
B440 Radial spherical roller bearings according to specification 342340 and A40 X 4 BS2
B441 Radial spherical roller bearings according to specification 342340, WM051 and WM077 X 4 BS2
B442 Radial spherical roller bearings according to specification WM051 and A40 4 BS2
B443 Radial spherical roller bearings according to specification WM059 and A80 X 4 BS2
B451 Bearings 61960 MA and 61968 MA to specification Sl, C4, WM074 and 344269 4 BB1
B46 Radial tapered roller bearings for improved adjustment, special oil, torque tested X 4 BT1
B460 Radial ball bearings, rings stabilised SO and special raceway diameter specification 4 BB1; BJ2
B470 Special rust preventive treatment with SHELL V-9705 or SHELL ENSIS 152 X 4 BB1
B471 Special rust preventive treatment with SHELL JYO X 4 BB1
B472 Special rust preventive treatment with SHELL Tellus 15 X 4 BB1
B473 Special rust preventive treatment with ESSO Univis P 38 X 4 BB1
B474 Special rust preventive treatment with ESSO Teresso 47 X 4 BB1
B475 Special rust preventive treatment with ESSO Spinesso 38 X 4 BB1
B476 Special rust preventive treatment with SHELL Tellus 33 X 4 BB1
B477 Special rust preventive treatment with Viscobil Sera 9 X 4 BB1
B478 Special rust preventive treatment with Etsynta Gold D 429/11 X 4 BB1
B479 Special rust preventive treatment with Aero SHELL Fluid No 12 X 4 BB1
B50 Bearings and bearing parts. Special documentation for customer 4 Any
B500 Balls Special documentation X 4
B501 Rolling bearings Rolling bearings with one empty cage pocket for raceway inspection 4
B502 Marking of bearings manufactured by SKF for competitors X 4 Any
B503 Balls Steering gear balls. Special documentation for customer X 4
B504 Bearings with 2 shields/seals and TN cage mounted with cage back at the marked 4 BB1
side of the bearing
B506 Bearing parts not to "Interchange standard" 4 Any
B507 Bearings for high temperature applications X 4 Any
B508 Cylindrical rollers Quality of conformance certificate 4
B511 Radial deep groove ball bearings, paired to WM074A, marked to WM067A, P64 4 BB1
B512 Rolling bearings Rolling bearings, marked with a consecutive number X 4
B513 Locking ring for Y-bearing Locking ring with mounted grub screw X 4
B514 Bearing parts For delivery to other SKF companies 4
B516 Special package 4 BB1
B517 For pairing with cylindrical roller bearings X 4 BDQ
B521 Series 73.. B Paired with special axial clearance X 4 BA2
B524 Radial angular contact ball bearing 7314 BM, paired, special tolerances 4 BA2
B525 Radial angular contact ball bearings, paired, greater axial internal clearance than Normal 4 BA2
B531 Radial cylindrical roller bearings type NUPJ with light alloy cage, paired X 4 BC2
B533 Radial rolling bearings Radial rolling bearings with special tolerances to be marked on bearing X 4
B534 Radial rolling bearings Radial rolling bearings, various tolerances and internal clearance marked on a slip in the X 4
package. Package also marked with the same
B536 Bearings with special MP9 cage 4 BC1
B541 Spherical roller thrust bearing 29412 B and 29414 B, paired X 4 BHS
B550 Cylindrical rollers Special sorting tolerances 4
B551 Cylindrical rollers Special length sorting tolerances X 4
B552 Cylindrical rollers SP diameter sorting tolerance X 4
B553 Cylindrical rollers Increased diameter tolerance. M2 - P4 X 4
B554 Cylindrical rollers Increased diameter tolerance. N - P4 X 4
B555 Cylindrical rollers Increased diameter tolerance. N - P6 X 4
B556 Cylindrical rollers Increased diameter tolerance. P2 - P6 X 4
B58 Shortened designations longer than 23 positions 4 BT1
B590 Shortened designations longer than 23 positions 4 Any
B611 Series 3605(00) Y-bearings, inner ring finish ground to table and ring phosphated to AV C-35 X 4 BBY
B612 Series 3605(00) Y-bearings, ground to B611 but no phosphated X 4 BBY
B620 Spherical plain bearings, steel-on-steel, surface treatment 4 BL
B621 Spherical plain bearings, inner ring copper plated and hard chromium platd 4 BL
B623 Spherical plain bearings, inner ring hard chromium plated 4 BL
B623A Spherical plain bearings, inner ring hard chromium plated and polished 4 BL
B624 Spherical plan bearings, inner ring, Ra 0,08 µm max., cut off 0,75 mm X 4 BL
B625 Spherical plain bearings, inner ring, Ra 0,4 µm max., cut off 0,75 mm X 4 BL
B626 Spherical plain bearings, inner ring, Ra 0,2 µm max., cut off 0,75 mm 4 BL
B641 Balls Separative balls 4
B642 Rolling elements Rolling elements, surface treatment X 4
B643 Rolling elements Rolling elements, surface treatment, coated with molybdenum disulphide 4
B644 Rolling elements Rolling elements, surface treatment, coated with molybdenum disulphide 4
B645 Rolling elements Rolling elements, surface treatment to AV-C51 (Replaced by B646) X 4
B646 Rolling elements Rolling elements, surface treatment to TL.40301 X 4
B66 Needle roller and cage assemblies, colour to indicate roller tolerances 4 BN
B661 Needle roller and cage assemblies, colour to indicate roller tolerances X 4 BN

12
B80 Rollling bearing Rolling bearing with case hardened outer ring. (Replaced by HA2) X 4
B801 Rollling bearing Rolling bearings with case hardened rolling elemets 4
B802 Rollling bearing Rolling bearings with case hardened inner and outer rings X 4
B803 Rollling bearing Rolling bearings with case hardened inner ring, outer ring and rolling elements 4
B804 Rollling bearing Rolling bearings with case hardening inner ring and rolling elements 4
B805 Rollling bearing Rolling bearings with case hardened outer ring and rolling elements 4
B811 Rollling bearing Rolling bearings with riveted machined cage of brass 4
B822 Rolling elements Rolling elements of DMo5VA (high speed steel), vacuum remelted or electroslagmelted and 4
remelted
B823 Rolling elements Rolling elements of throughhardening carbon chromium bearing steel (SAE-52100), vacuum X 4
remelted. (Replaced by HE5)
B824 Rolling elements Rolling elements of steel M85 to TL10.12b (Repl. by B826) X 4
B825 Rolling elements Rolling elements of manganese chromium steel 17MnCr5, case hardened X 4
B826 Rolling elements Rolling elements of manganese chromium steel 85Mn3 to TL10.12d X 4
B827 Balls Balls for SKF-STÅL Hällefors, standards for oxygen and nitrogen analyses 4
B843 Rolling bearings Rolling bearings with bearing rings stabilised Sl and rolling elements with normal stabilization 4
B85 Rolling bearings Rolling bearings with inner and outer rings or shaft and housing washer of vacuum remelted X 4
through-hardening carbon chromium steel. (Replaced by HE1)
B850 Rolling bearings Rolling bearings with inner ring or shaft washer of vacuum remelted through-hardening carbon X 4
chromium steel. (Replaced by HE3)
B851 Rolling bearings Rolling bearings with inner and outer rings or shaft and housing washers and rolling elements X 4
of vacuum remelted through hardening carbon chromium steel. (Replaced by HE4)
B852 Rolling bearings Rolling bearings with inner rings or shaft washers and rolling elements of vacuum remelted X 4
through-hardening carbon chromium steel. (Replaced by HE7)
B86 Locking washer Locking washer MB 8 of steel St37 (DIN 17100)
B861 Adapter sleeves Adapter sleeves of carbon chromium steel 100Cr6 from cold rolled tube X
B900 Radial cylindrical roller bearings series NN 30 (K) and NNU 49 (K), outer ring with 3 lubrication X 4 BC2
holes
B901 Radial needle roller bearings with one lubrication hole in outer ring X 4 BN
B902 Radial needle roller bearings with two lubrication holes outer ring 4 BN
B903 Radial needle roller bearings with one lubrication hole in inner ring X 4 BN
B904 Radial needle roller bearings with two lubrication holes in inner ring X 4 BN
B905 Radial needle roller bearings without lubrication groove and lubrication holes wich would X 4 BN
otherwise be standard features
B906 Drawn cup needle roller bearings open or closed end, with lubrication holes in the cup X 4 BND; BNK
B907 Drawn cup needle roller bearings open or closed end with 2 lubrication holes in the cup 4 BND; BNK
B910 Incomplete bearing designation, incomplete designation on bearing box or bearing package X 4 BC1
B911 Taper roller thrust bearings with rollers marked with consecutive number of bearing X 4 BF
B912 Radial cylindrical roller bearings with form tolerances of roller guide flange within range of tolerance 4 BC1
B913 Special run in and radial clearance X 4 BN
B914 Radial needle roller bearings with 'B' chamfered rollers X 4 BN
B915 Rolling bearings Rolling bearings, according to W33 , but with 6 lubrication holes X 4
B92 Loose outer ring without cage and rollers delivered to the customer X 4 BC
B920 Radial cylindrical roller bearings, type NJ, distance between side face of rings (protrusion or 4 BC1
recess) and radial internal clearance in µm given on slip in package
B921 Radial cylindrical roller bearings E design. Undulated pressed steel cage J3 or J2 (L) 4 BC1
B924 Tapered rollers Tapered rollers, machined including operation No 280 4
B925 Radial tapered roller Reduced raceway diameter rolerance, delivered unassembly to customer 4
bearing inner rings
B926 Pressed cage Radial tapered roller bearing pressed cages, preassembly cage opening through expansion. X 4
(Replaced by VX604)
B93 Radial deep groove ball bearing 6004, cage type Y or TN, less stringent bearing accuracy X 4 BB1
B930 Radial tapered roller bearing 30203, pressed steel cage J2, less stringent bearing accuracy 4 BT1
B931 Radial deep groove ball bearings, special cleanliness requirements (Repl. by Q66) X 4 BB1
B932 Bearings complete free from oil or grease. Packed in VPI paper X 4 BB1
B933 Rolling bearings Rolling bearing or bearing parts without markings, designation only on package (Repl. by Vk001) X 4
B934 Calibrated bearings for stress measurement 4 ANY
B935 Balls Steel balls, non-hardened 4
B936 Radial maintenace-free spherical plain bearings, no protrusion of liner material 4 BLR
B937 Radial deep groove ball bearings of Cannstatt manufacture, less stringent bearing accuracy X 4 BB1
(open bearings, Z, 2Z)
B937A Radial deep groove ball bearings of Cannstatt manufacture, less stringent bearing accuracy X 4 BB1
(open bearings, Z, 2Z)
B937B Radial deep groove ball bearings of Cannstatt manufacture, less stringent bearing accuracy X 4 BB1
(open bearings, Z, 2Z)
B937C Radial deep groove ball bearings of Cannstatt manufacture, less stringent bearing accuracy X 4 BB1
(open bearings, Z, 2Z)
B94 Spherical roller thrust bearings, without guide sleeve 4 BHS
B951 Rolling bearings Rolling bearings and bearing parts of Cannstatt manufacture, without markings, neutral X 4
packaging materials. Package marked with bearing designation only (no Suffix, no SKF)
B951A Rolling bearings As B951 but SKF designation markings on bearings or bearing parts permitted X 4
B951B Complete needle roller bearings, including drawn cup bearings manufactured by DWB to SKF X 4 BN
specifications and marked as SKF products. SKF labels used
B951C As B951B but neutral labels used x 4 BN
B951D Deep groove ball bearings of Cannstatt manufacture. Bearing markings normal but X 4 BB1
SKF omitted. Neutral packages
B951E Marking and packing of bearings and bearing parts supplied to competitors (DWB) X 4 Any
B960 Bearings: 100 % crack inspection on bearing components (exc. cage) X 4 ANY
BA Series 294 No cage guiding ring. Machined cage 3, 4 BHS
BA Series 72, 718 Contact angle 40º Modified internal design 1 BA1
BA Prefix K Bearings with rollers having tapered large end 1 BF
BC Series 294 Modified bearing parts. Used for component designation only. 1 BHS
BC Prefix K Bearings with rollers having straight roller end 1 BF
BD Cylindrical roller Roller shape: B-chamfer and dimple 4
BD Tapered rollers Roller shape: B design and dimple 4
BE Series 72, 73 Contact angle 40º Internal geometry modified for higher capacity. 1 BA1
BF Special plummer blocks Through shaft, locating bearing
BIR INA series Crowned inner ring raceway BN
BK Needle roller Roller shape: B-chamfer and hemispherical ends 4
BL Inner ring side face lapped for a contact seal 4 BS2
BL Special plummer blocks Through shaft non-locating bearing
BP Special plummer blocks Through shaft, both bearing locating
BR New Departure, prefix G BB1
BS Cylindrical roller Roller shape: B-chamfer and sphered ends 4
C Series BR Cross roller chain: longer rivets to faciliatate movements of links 1 BGK
C Series GE etc. Antifriction linig of DU-material 1 BLR
C Series HNA and RHNA One guid flange only 1 BND
C Series NCF 30 INA design 1 BC1
C Series RK Decreased number of rollers 1 BN

13
C Series 213, 222, 223, 'C-design'. Flangeless inner ring. Symmetrical rollers. Loose guide ring. Pressed cage. 1 BS2
230, 231, 232, 238, 239,
240, 241, 242, 248, 249
C Series 302, 303, 313, Straight outer ring raceway 1 BT1
320, 322, 323, 329
C Series 32, 33 Modified radial clearance 4 BA2
C Series 60, 62 Modified ball set and adapted ring raceways 1 BB1
C Series 70, 719, 72 Contact angle 15º X 4 BA1
C Series CK ADR-series X 1 BBF
C New Departure, prefix G BB1
C Adapter sleeves With ribbed lock washer to be used with sealed bearings
C Lubricants for rolling Bearing filling :More grease than B 'full' X 4 Any
bearings
C Cylindrical rollers Roller shape: C-chamfer (SKF Schweinfurt). Equal to normal B rollers 4
C Needle rollers Roller shape: Bremen rollers, flat sheared end, low carbon steel 4
C Spherical rollers Roller shape to fit 'C' design bearings 4
C Outer ring with cylindrical outside diameter 2 BBY
C Y-bearing units Bearings from Series 17062(00). Narrow series, excentric locking ring, RS seals,
no lubrication hole
C Tapered roller bearings Outer ring with flange, single row X 2 BT1
Gamet Series
C Prefix K Suffix for thrust bearings BF
C Bushing Sliding material, PTFE with lead oxide for composite plain bearings 2 BP
C Sleeves Special sleeve for self-aligning ball bearings
C Nuts Made of SG cast iron
C Locking nuts Increased face runout Replaced by normal X
C Cover set or assembly for SBD housing of C feature
C... Matched bearing sets, Special axial clearance/standout. C followed by a nominal value in µm 4 BA; BB; BT
single bearings
C0026 Combination of C2 and C6 4 Any
C01 Accuracy. C-classes : Close running accuracy tolerance on inner ring 4 Any
C02 Accuracy. C-classes : Extra close running accuracy tolerance on inner ring 4 Any
C023 Combination of C02 and C3 4 Any
C03 Accuracy. C-classes : Close running accuracy tolerance on outer ring 4 Any
C04 Accuracy. C-classes : Extra close running accuracy tolerance on outer ring 4 Any
C05 Accuracy. C-classes : C01 + C03 4 Any
C06 Accuracy. C-classes : C02 + C03 4 Any
C07 Accuracy. C-classes : C01 + C04 4 Any
C08 Accuracy. C-classes : C02 + C04 4 Any
C083 Accuracy. C-classes : C08 + C3 4 Any
C1 Inner ring of composite material (plastic-metal) 4 BLR
C1 Established oil film thickness 4 BVH
C1 Bearing internal clearance : Clearance less than C2 4 Any
C10 Accuracy. C-classes. : Tolerances for bore and outside diameter smaller than Normal. 4 Any
For bearings with taper bore, C10 refers to outside diameter only
C102 Combination of C10 and C2 4 Any
C11 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C13 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C15 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C1F Bearing internal clearance : Displaced upper half of C1 clearance range 4 Any
C1H Bearing internal clearance : Upper half of C1 clearance range 4 Any
C1L Bearing internal clearance : Lower half of C1 clearance range 4 Any
C1M Bearing internal clearance : Displaced lower half of C1 clearance range 4 Any
C1P Bearing internal clearance : Displaced basic clearance range (Upper half of C1 + lower half of C2) 4 Any
C1R Old' C1 internal clearance range. Not interchangeable 4 BC1
C2 Outer ring of composite material (plastic-metal) 4 BLR
C2 Bearing internal clearance. : Clearance less than Normal 4 Any
C20 Accuracy. C-classes : Bore tolerance smaller than in class C10. Outside diameter 4 Any
tolerance Normal
C20NH Combination of C20 + CNH 4 Any
C2E Bearing internal clearance. : Clearance less than Normal special range for electrical motor 4 BB1
C2F Bearing internal clearance : Displaced upper half of C2 clearance range 4 Any
C2H Bearing internal clearance : Upper half of C2 clearance range 4 Any
C2L Bearing internal clearance : Lower half of C2 clearance range 4 Any
C2M Bearing internal clearance : Displaced lower half of C2 clearance range 4 Any
C2P Bearing internal clearance : Displaced basic clearance range. Upper half of C2 + lower half of CN 4 Any
C2R Old' C2 internal clearance range. Not interchangeable 4 BC1
C3 Bearing internal clearance : Clearance greater than Normal 4 Any
C3 Established oil film thickness greater than C1 4 BVH
C30 Accuracy. C-classes: Bore tolerance smaller than in class C10 and positioned so that the 4 Any
lower limit coincides with the lower limit of Normal tolerance. Outside diameter tolerance Normal
C31 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C33 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C35 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C3B Bearing internal clearance : Clearance greater than Normal (altered C3 clearance) X 4 BLR
C3F Bearing internal clearance : Displaced upper half of C3 clearance range 4 Any
C3H Bearing internal clearance : Upper half of C3 clearance range 4 Any
C3L Bearing internal clearance : Lower half of C3 clearance range 4 Any
C3M Bearing internal clearance : Displaced lower half of C3 clearance range 4 Any
C3P Bearing internal clearance : Displaced basic clearance range (upper half of C3 + lower half of C4) 4 Any
C3R Old' C3 internal clearance range. Not interchangeable 4 BC1
C4 Bearing internal clearance : Clearance greater than C3 4 Any
C40 Accuracy. C-classes : Outside diameter tolerance smaller than in class C10. 4 Any
Bore tolerance Normal
C4F Bearing internal clearance :Displaced upper half of C4 clearance range 4 Any
C4H Bearing internal clearance : Upper half of C4 clearance range 4 Any
C4L Bearing internal clearance : Lower half of C4 clearance range 4 Any
C4M Bearing internal clearance : Displaced lower half of C4 clearance range 4 Any
C4P Bearing internal clearance : Displaced basic clearance range (upper half of C4 + lower half of C5) 4 Any
C4R Old' C4 internal clearance range. Not interchangeable 4 BC1
C5 Bearing internal clearance : Clearance greater than C4 4 Any
C5 Established oil film thickness greater than C3 4 BVH

14
C51 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C53 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C55 Oil film thickness for combined bearings (Series BHC). Combinations of the C-classes for 4 BVH
radial and thrust respectively (the first digit for radial and the second digit for thrust).
C5H Bearing internal clearance : Upper half of C5 clearance range 4 Any
C5L Bearing internal clearance : Lower half of C5 clearance range 4 Any
C5M Bearing internal clearance : Displaced lower half of C5 clearance range 4 Any
C5R Old' C5 internal clearance range. Not interchangeable 4 BC1
C6 Vibration and noise level. C-classes Exacting requirements regarding vibration level X 4 Any
(Replaced by Q6)
C7 Vibration and noise level. C-classes Very exacting requirements regarding vibration level X 4 Any
(Replaced by Q5)
C70 Combination of C20 + C40 4 BB1
C78 Combination of C70 + C08 4 BB1
C782 Combination of C78 + C2 4 BB1
C8(A) Vibration and noise level. C-classes Rigorous inspection of dimensions, 4 Any
running accuracy, surface finish etc.
C80 Accuracy. C-classes : Close total height tolerance for thrust bearings 4 BD; BE; BF;
BH
C9 Very rigorous inspection of dimensions, running accuracy, surface finish etc.. 4 Any
Both bearing rings stabilised.
CA Matched bearing sets Small axial internal clearance 4 BA; BB
CA Y-bearing units Bearings from Series 17362(00) with land riding seals
CA Series 222, 230, 231, 'C-design' but integral flanges at the outer faces of the inner ring. Machined cage 1, 3 BS2
232, 238, 239, 240, 241,
242, 249
CAB Series 240, 241, 249 'CA-design' but pierced rollers and pin-type cage 1, 3 BS2
CABC Series 240, 241, 250 Internal CC design 1 BS2
CAC Series 222, 230, 231, Internal CC design 1 BS2
232, 238, 239, 240, 241,
242, 249
CB Matched bearing sets Medium axial internal clearance. Greater than for CA 4 BA; BB
CB Spherical rollers Roller shape: Roller for bearings in 'CAB' and CB design'. Symmetric raceway. Pierced 4
CB Y-bearing units Bearings from Series 17322(00) with land riding seals and lubrication hole.
CB Prefix K Suffix for thrust bearing BF
CB Series 240, 241 'C-design'. Flangeless inner ring. Loose guide ring. Pierced rollers and pin-type cage 1, 3 BS2
CC Matched bearing sets Great axial internal clearance. Greater than for CB 4 BA; BB
CC Series 70 Contact angle 12º. Very high speed design 1 BA1
CC Same as C but with improved roller guidance and reduced friction 1 BS2
CCX Series 719, 70, 72 Contact angle 12º modified (CC) internal design X 1 BA1
CD Spherical rollers Roller shape: for bearings in C-design. Symmetric raceway and dimple in the convex X 4
guiding end
CD Series 719, 70, 72 Contact angle 15º 1 BA1
CD Series 239, 240 Cage and rollers modified in order to prevent lateral protrusion of the cage under axial load 1 BS2
(239) or to avoid contact with seals (240)
CE Prefix K Suffix for thrust bearing BF
CE Series 70, 719 Contact angle 15º 'High speed design' 1 BA1
CG Matched bearing sets Zero 'clearance/preload' Tolerance equal to normal 4 BT
CG Y-bearing units Bearings from Series 17022(00) with lubrication hole
CL0 Inch size Accurancy to ISO class 0 4 BT
CL00 Inch size Accurancy to ISO class 00 4 BT
CL2 Inch size Accurancy to ISO class 2 4 BT
CL3 Inch size Accurancy to ISO class 3 4 BT
CL7 Inch size Pinion bearing quality according to specifications 4 BT
CL7A Pinion bearing quality according to specifications 4 BT1
CL7C Pinion bearing quality according to specifications 4 BT1
CLB Tolerances to ABMA class B 4 BT
CLC Tolerances to ABMA class C 4 BT
CLK Tolerances to ABMA class K 4 BT
CLN Tolerances to ABMA class N (normal) 4 BT
CLN7A CLN + CL7A 4 BT
CM Cylindrical rollers Modified C-design 4
CN Bearing internal clearance : Normal clearance. Used when normal clearance is 4 Any
required together with an accuracy symbol which includes clearance other than normal
CNF Bearing internal clearance : Displaced upper half of normal clearance range 4 Any
CNH Bearing internal clearance : Upper half of nominal clearance range 4 Any
CNL Bearing internal clearance : Lower half of nominal clearance range 4 Any
CNM Bearing internal clearance : Displaced lower half of nominal clearance range 4 Any
CNP Bearing internal clearance : Displaced basic clearance range (upper half of CN + lower half of C3) 4 Any
CNR 'Old' normal clearance range. Not interchangeable 4 BC
CP Cylindrical rollers C-chamfer and pierced roller 4
CS Series 70, 719 Contact angle 15º 'High speed design' with modified internal design (non SKF) 1 BA1
CS Contact seal at one side of the bearing. The seal is of steel sheet and moulded with rubber 2 BSC
CS2 Contact seal at one side of the bearing. The seal is of steel sheet and moulded with 2 BSC
fluorocarbon rubber
CS5 Contact seal at one side of the bearing. The seal is of steel sheet and moulded with 2 BSC;BS2
hydrogenated nitrile rubber
CT Spherical rollers C-design, toroidal end shape 4
CX Series 70, 719, 72 Contact angle 15º with modified (C) internal design (non SKF) 1 BA1
D Cylindrical rollers Roller shape: dimple 4
D Spherical rollers Roller shape: Roller for single row radial bearing. 'Tonnen lager'. Symmetric raceway. Dimple 4
D Series GE etc. Filling grooves in outer ring 2 BL
D Bushing Sliding material, PTFE with lead and …., for composite plain bearings 2 BP
D Hydrostatic shoe bearing HSBJ, double guidance 4 BVH
D Sleeves Sleeve in halves
D Nuts Doubled face runout
D Locking nuts Phosphated (gebondert) X
D RKS. Slewing rings Surface hardening of the teeth. Induction hardening of sides and tooth space bottom 4 BV
D Continuous casting Driven roller units
roller units
D Inch size 1. Double cone or cup. 2. Suffix for thrust bearing 2 BT; BF
D Tapered rollers Roller shape: dimple (dimple diameter 3.5 mm) 4
D Y-bearing units Bearing and housing of next larger size than originally
D Series 2, 3 Bearings of RBF design X 1 BBF
D Series 70, 719 Contact angle 25º 'Very high speed design' 1 BA1
D Series 33 Two-piece inner ring. Contact angle 45º 1 BA2
D Series 62 'New generation' (only part designations) 1 BB1

15
D Series K ADR series X 1 BS2
D Series NJP To denote extended inner ring (Side ring width normal) 2 BC1
D Series NAXB 59 Design as to INA Series NKIB 1 BN
D0 The two main bearing components are not interchangeable. Used only for complete cylindrical X 1 BC
roller bearings. (SKF bearings manufactured in Germany have the suffix NA)
D35, etc. Unthreaded adapter 4 BAC
D7 Outer ring with approved recesses. Without seals. Used exclusively in 2 Any
cases where customer specifies rings for shield insertion
D8 Outer ring has no recesses for seals. Used exclusively in cases where 2 Any
customer specifies ring without recesses.
D9 BB1, Outer and/or inner rings have recesses for shields or seals at both X 4 BB1
sides or one side only, but no sealing is provided. Used for single row deep groove ball
bearings. From 1975 applicable only to inner ring recesses

D9 BT4, with seal recesses (on IR and OR) but no mounted seals/shields. 4 BT4
DA Series NNF 50 Two-piece inner ring. Modified internal and external design. Modified snap ring grooves in outer ring 1, 2 BC2
DA Cylindrical rollers Dimple alternative manufacturing 4
DA Tapered rollers Roller shape: Dimple (dimple diameter 3 mm) 4
DB Matched bearing sets Two bearings: back to back 4 BA; BB; BT
DB Series 32, 33 Two-piece inner ring. Contact angle 32º 1 BA2
DBT Matched bearing sets Two bearings: back to back. Loading case: thrust only 4 BA; BB
DC NICE Series Contact seal at each side of the bearing X 2 BB1
DD Cylindrical rollers Deep dimple 4
DF Matched bearing sets Two bearings: face to face 4 BA; BB; BT
DFT Matched bearing sets Two bearings: face to face, Loading case: thrust only 4 BA; BB
DG Matched bearing sets Two bearings: universal 4 BA
DGT Matched bearing sets Two bearings: universal, Loading case: thrust only 4 BA
DH Two housing washers 2 BD1
DHP (DH + DP) Two housing washers and bore diameter of housing washer smaller than normal 2 BD1
DL NICE Series 7500 Labyrinth seal at each side of the bearing 2 BB1
DLG NICE Series Labyrinth seal at each side of the bearings with snap ring 2 BB1
DN Series 2 Bearings of RBF design 1 BBF
DP Bore diameter of housing washer smaller than normal (earlier standard) 2 BD1
DR Matched bearing sets Two bearings in tandem.Loading case: radial only 4 BB; BC
DS NICE Series Shield at each side of the bearing 2 BB1
DS Two shaft washers 2 BD1
DS INA series Slotted radial needle roller and cage assembly (e.g. K 24x28x24 DS) BN
DSG NICE Series Shield at each side of the bearing and snap ring 2 BB1
DT Matched bearing sets Two bearings in tandem. Loading case: radial and thrust 4 BA; BB; BT
DTT Matched bearing sets Two bearings in tandem, Loading case: thrust only 4 BA; BB
E Series 303, 323 Increased capacity BT1
E Cylindrical rollers Roller shape: Crowned raceway (not reference to bearing of E design) 4
E Tapered rollers Roller shape: Crowned raceway (not reference to bearing of E design) X 4
E Axially split one-piece outer ring 2 BL
E Sliding material, PTFE with MoS2 (without lead), for composite plain bearings 2 BL
E Y-bearing units Bearings from Series 17162(00) : Narrow series, excentric locking. RS1-seals, no lubrication hole
E Series NU 2, NU 3, Increased carrying capacity. Larger size rollers. Increased number of rollers. 1 BC1
NUP 2, NJ 3, etc.
E Housings Series FYR, SYR :Triguard seal X
E Angle rings, side rings Modified to fit E design cylindrical roller bearings. (Series HJ, P and PA) 1 BC1
E Series QJ 2, QJ 3 Increased carrying capacity. Increased number of balls. Bigger-size balls 1 BAQ
E Increased carrying capacity. Rolling elements larger than standard 1 BA; BB1; BN;
BJ2; BHS; BS2
E New Departure, prefix G BB1
E Adapter sleeves With narrow slot. For CARB bearings
E Cover set or assembly for SBD housing of E feature
E101 Deep groove ball bearings supplied without flinger mounted on inner ring (or spindle of water X 2 BB1; BBW
pump spindles)
E102 Cylindrical roller bearings. Flanges relieved to obtain quieter running bearings X 1 BC1
E103 Deep groove ball bearings with special plastic shields. Individual drawings issued for each size 2 BB1
E104 Deep groove ball bearings. C6 with normal clearance and special raceway radii. Individual 4 BB1
drawings issued for each size
E105 Deep groove ball bearings. C6 with diametric clearance 0,009 to 0,017 and special raceway 1, 4 BB1
radii. Individual drawings issued for each size
E106 Deep groove ball bearings supplied without felt seal 2 BB1
E107 Machined cages Special width control of drilled cages 3
E108 Deep groove ball bearings with garter seals. Inner ring land plunge ground. Surface finish X 2 BB1
12 - 20 microinch CLA under seal lip. Detailed on each individual drawing suffixed E 108
E11 Deep groove ball bearings. RS grooves in outer ring. Inner ring without recesses. X 2 BB1
Fitted with land riding shields or seals
E111 As E11 but with split periphery shields, e.g. 608-Z/E111 2 BB1
E121 Bearings with modified recess or groove in outer ring diameter. X 2 BB1
Individual drawing issued, e.g. 413897
E122 Cylindrical roller bearings. With snap ring groove. Pressed cage assembled with large flange 2, 4 BC1
diameter on the snap ring groove side
E123 Taper roller bearings with tracks to standard crowning and incorporating rollers with 'B' X 1 BT1
crowning, e.g. K-M 12649/K-M 12610/E123
E20 Balls Utility quality balls 4
E201 Balls Unfinished balls (unhardened). Taken from production after pressing and filing. Not hardened., 4
Limits + 0,004" (0,10), Limits + 0,005" (0,13)
E203 Balls Unfinished balls (hardened). Taken from production after pressing, filing and hardening, 4
Limits + 0,004" (0,10), Limits + 0,005" (0,13)
E204 Spherical roller bearings. Special internal controls for quality X 4 BS2
E207 Spherical roller bearings. Roller and ring tolerances tighter than normal 4 BS2
E208 Balls Cycle quality balls. Special specification for Luton production 4
E209 Bearing with bore and outside diameter limits towards the middle of the standard tolerance 4 Any
band as per table or drawing
E211 Roller bearings Roller bearings with raceways of rings and rollers to a special surface finish specification 4
E212 Balls 1/2" balls for four ball test specification. Not C6 X 4
E216 Above normal quality. Tapered roller bearings for USA market 4 BT1
E217 The old C7 specification. Superseded by E219 X 4 BT1
E219 Pinion tapered roller bearing quality (X2K-prefix) X 4 BT1
E30 Superseded by new Group standard suffix L to clearance symbol. E.g. C2L, CNL and c3L etc. X 4 Any
E301 Superseded by new Group standard suffix H to clearance symbol. E.g. C2H, CNH, C3H etc. X 4 Any
E302 Run in bearings X 4 BB1
E303 Bearings with internal radial clearance between C4 and C5. Special clearance stated on 4 BB1
drawing for each size
E40 Standard radial Standard radial bearings filled 33 % - 50 % (Alvania 3) MT33 4
rolling bearings

16
E401 Standard radial Standard radial bearings filled 33 % - 50 % Aero Shell 15) LHT63 4
rolling bearings
E402 Standard radial Standar radial bearings filled 45 % - 60 % (Mobilplex 47) MT64 4
rolling bearings
E403 Sealed and shielded bearings. Inner rings marked with full designation X 4 BB1
E405 Double row ball bearing spindle assemblies supplied without seals and not greased, 4 BB2
e.g. 4089940/E 405
E406 Export packaging requiring additional precautions X 4 Any
E407 Special grease filling (MT62 grease). Method and Quantity 4 BB1
E408 Special grease filling (MT62 grease). Method and Quantity 4 BB1
E409 Special grease filling (MT62 grease). Method and Quantity 4 BB1
E51 Bearings to pre-GFSS standard for segregation purposes during the GFSS transitional periods 1 Any
E511 Rings Rings made in line at IRVINE for cost and store purposes. Rings up to and including face and
diameter ground held in store
E80 Bearings with inner ring carburised and case hardened 4 BS2
E801 Rolling bearings Bearings with the inner ring and rolling elements carburised and case hardened (or rolling 4
elements case hardened when used with part number).
E81 Rolling bearings Bearings with the outer ring carburised and case hardened X 4
E811 Rolling bearings Bearings with outer ring and rolling elements carburised and case hardened 4
E82 Rolling bearings Bearings with both rings carburised and case hardened. E 80 Inner ring. E 81 Outer ring 4
E821 Rolling bearings Bearings with both rings and rolling elements carburised and case hardened. E80 Inner ring. 4
E 81 Outer ring. E 801 Rolling elements
E83 Rolling bearings Heat in cyanide bath at 870º C for 15 mins., then quenched. Temper in neutral salt at 500º C 4
for 1 hour, then washed
E831 Rolling bearings Bearings with rolling elements and both rings manufactured from Tungsten High Speed Steel X 4
E832 Guide rings Sintered metal (L 501). Guide rings for C type spherical roller bearings 4
E84 Bearings supplied with seals of ultra high Nitrile rubber. Standard bearing and seals to show X 2 BB1
'E' designation, e.g. seal SR-6013-RS1/E84, bearing 6013-2RS1/C3E84
E90 Rollers Pressed rollers
E901 Products to be inspected by customer before despatch X 4 Any
E902 Housings and plummer Standard housings and plummer blocks when supplied with special felt strisps to suit
blocks special shaft diameters
E904 Rolling bearings Crack detection requirements for rings and rolling elements 4
E91 Safety critical items procedure and specification. Types listed on drawings 429574/1, /2 etc. X 4 Any
E92 Rings Unfinished rings: Bore and raceway to be finished. Designation for special CPS stores records
E921 Rings Unfinished rings: Raceway to be finished. Designation for special CPS stores records
EA Tapered rollers Modified large and small roller ends 4
EA Y-bearing units Bearings from series 17462(00) with land riding seals
EA Series HNJ Cylindrical roller bearing BC1
EA Sleeves Series 294 BHS
EB Series GEZ 'Ball diameter' to US standard 1 BLR
EB Y-bearing units Bearing from Series 17162(00)-2LS
EC E-design plus modified flange angle 1 BC1
EC Shaft washer Used for bearing with suffix EF and EM 1 BHS
ED Tapered rollers Roller shape (E + D) crowned raceway and dimple 4
EF Cylindrical rollers Roller shape:Crowned raceway with logarithmic end drop larger than EL 4
EH Cylindrical rollers Roller shape: Crowned raceway with logarithmic end drop larger than EF 4
EG Y-bearing units Bearing from Series 17162(00) B2LS
EL Cylindrical rollers Logarithmic form (end drops) 4
EM Y-bearing units Bearing from Series YET 2 CW
EP1 Increased running accuracy to meet requirements for certain electric motor applications X 4 BB1
EP5 Increased running accuracy, dimensional accuracy and exacting requirements on vibration level to meet X 4 BB1
ER New Departure, prefix G BB1
ER Outer rings,Y-bearings Cyl. outer diam, snap ring groove and snap ring on OD, lubrication groove and one hole on the 2 BBY
OD opposite the snap ring groove, special outer ring width
ES Cylindrical rollers Roller shape (E + S) crowned raceway and sphered ends 4
ET Spherical rollers E-design, toroidal end shape 4
EW Y-bearing units Bearing from Series WOR 17162(00) with wider outer ring X
EW Series 52, 53, 54 Contact angle converges towards bearing axis 1 BA2
F Series K, KN, ADR Series X BS1
KNA, WKNA
F Bushing, series PG, PXG Glyco series, Lining surface of Teflon X 2 BPG
F Rolling bearings Machined cages. Steel cage, usually centered on the rolling elements 3 Any
F Inch size Injection moulded cages 3 BT
F Needle rollers Roller shape: flat ends 4
F Sleeves Phosphated
F Nuts Zinc phosphated when not standard
F Locking devices Zinc phosphated when not standard
F RKS. Slewing rings Surface hardening of the teeth. Flame hardening of sides only 4 BV
F MRC Series Bearing with one shield 2 BB1
F Antifriction lining of PTFE, glassfibre reinforced plastic with PTFE additives in outer ring 1 BL
F Y-bearing units Bearings from serie 2382(00). Narrow series, excentric locking ring, RS1-seals, lubrication hole
F Z sealing washers Flocked
F Series 70, 719 Contact angle 18º 'Very high speed design' 1 BA1
F Cover set or assembly for 'locating bearing' SBD housing
F to U Antifriction lining and/or rings of material other than hardened steel 1 BL
F1 Machined cages. Steel cage, usually centered on the rolling elements, phosphated 3 BA1
F1 Inner ring of PTFE composite 4 BL
F1 Z sealing washers Flocked
F14 F1 design and F4 material 3 BA1
F2 Machined cages. Steel cage, usually centered on the rolling elements, tenifer surface treatment 3 BA1; BS2;
BHS
F2 Outer ring of PTFE composite 4 BL
F2A Machined cages. Steel cage, centered in the outer ring, tenifer surface treatment 3 BS2
F3 Machined cages. Steel cage, usually centered on the rolling elements 3 BC1
F3 Inner and outer ring of PTFE composite 4 BL
F3 Machined cages. Nodular cast iron, usually centered on the rolling elements 3 BHS
F4 Machined steel cage, matr. SKF 3 3 BA1; BA2; BB1
F4 Antifriction lining of PTFE on inner ring 1 BL
F6 Machined cages. Steel cage, usually centered on the rolling elements 3 BC1
FA Rolling bearings Machined cages. Steel cage, centered in the outer ring 3 Any
FA Y-bearing units Bearing from series 2382(00)-2LS or 2382(00)-D2LS
FB Rolling bearings Machined cages. Steel cage, centered on the inner ring 3 Any
FD Y-bearing units (F + D) Bearings from serie 2382(00) D Narrow series, excentric locking ring, RS1-seals,
lubrication hole and Plus tolerance for metric bore diameter
FE Machined cage. Steel cage phosphated 3 Any
FF MRC Series Bearing with two shields 2 BB1
FFG MRC Series Bearing with two shields and snap ring 2 BB1

17
 FFP MRC Series Bearing with two rubber coated shields 2 BB1
FFx MRC Series Bearing with two shields and tapered bore 2 BB1
FG MRC Series Bearing with one shield and snap ring 2 BB1
FG Y-bearing units Bearings from serie 2382(00) B with lubrication hole
FH Y-bearing units (FG + D) Bearings from Serie 2382(00) BD with lubrication hole and plus tolerance for
metric bore diameter
FJ Y-bearing units Bearings from series 2382(00) B2LS or 2382(00) BD2LS
FM Y-bearing units Bearings from Series YET 2
FMA INA series Machined steel cage, M profile BN
F-MG MRC Series One shield on non standard side, max type bearing and snap ring mounted 2 BB1
FN Lubricants filling degree Grease filling is deviating from the standard grease filling, specified as 4 Any
X standard is not equal to 25 to 35% free volume,
FP Machined cages. Steel cage, centred on one or other of the rings, with slotted or 3 Any
broached pockets
FR NICE Series Ground, thrust 2 BB1
FX Bushing Composite structure: stainless steel strip and sintered bronze powder; sliding material: PTFE 2 BP
FX MRC Series ("FRIMINOX")
Bearing with one shield and tapered bore 2 BB1
Fx Lubricants filling degree Letter F plus a digit 0 to 9 indicates non standard filling degree 4 Any
FZ RZ seal plus flinger 2 BB1
FZ MRC Series Bearing with one shield and one seal 2 BB1
G Single bearings. Both sidefaces of the bearing ground so that any two bearings with this 2 BA1; BB1
feature can be mounted as a pair, back to back, face to face or in tandem. Those mounted back to
back or face to face have a certain amount of axial clearance or preload
G Cylindrical roller Rollers for gudgeon pin bearings. Specific tolerances 4
G Precision tapered roller bearings (GAMET). Outer ring without flange, double row X 2 BT2
G Antifriction lining of hardened stainless steel in outer ring 1 BL
G MRC and NICE Series Bearing with snap ring 4 BB1; BA1
G TSNA seal Axially split radial seal made of 'polymethane integrated foam'
G Y-bearing units Bearings from serie 3605(00) Extra wide series, excentric locking ring labyrinth seals,
lubrication hole
G Z sealing washers Galvanized
G Nuts HMV nuts made of SG cast iron
G Sleeves Thread diameter changed acc. to ISO
G Locking nuts One side face ground
G ANSG seal Ground on outer diameter
G Cover set or assembly for SBD housing of G feature
G... Matched bearing sets or Special preload in daN uncoded. Example: G490 = preload 490 daN 4 BA; BB; BT
single bearings
G1 Inner ring of hardened stainless steel 4 BL
G1 Bushing Axial lubrication grooves 2 BP
G10 Balls To ISO grade10 4
G16 Balls To ISO grade16 4
G2 Needle roller Grade (tolerance class), gauge tolerance 2 µm 4
G2 Outer ring of hardened stainless steel 4 BL
G20 Balls To ISO grade20 4
G28 Balls To ISO grade28 4
G3 Balls To ISO grade 3 4
G3 Needle roller Grade (tolerance class), gauge tolerance 3 µm 4
G3 Inner and outer ring of hardened stainless steel 4 BL
G4 Antifriction lining of hardened stainless steel on inner ring 1 BL
G40 Balls To ISO grade40 4
G5 Balls To ISO grade 5 4
G5 Needle roller Grade (tolerance class), gauge tolerance 5 µm 4
GA Matched bearing sets Single universally matchable bearing - Light preload 4 BA; BB
GA Single bearing. Both side faces ground so that when mounted back to back or face to face 2 BA1
any two bearings with this feature, unlike type G, are subjected to a certain preload, the amount of
which depends on the bearing series and size.
GB Single bearing. Both side faces ground so that when mounted back to back or face to face 2 BA1
any two bearings with this feature have greater preload than a pair of bearings with the suffix GA.
GB Matched bearing sets Single universally matchable bearing - Medium preload. Greater than for GA 4 BA; BB
GC Single bearing. Both side faces ground so that when mounted back to back or face to face 2 BA1
any two bearings with this feature have greater preload than a pair of bearings with the suffix GB
GC Matched bearing sets Single universally matchable bearing - Heavy preload. Greater than GB 4 BA
GD Y-bearing units G + D Bearings from serie 3605(00) D Extra wide series, excentric locking ring labyrinth
seals, lubrication hole and plus tolerance for metric bore diameter
GD Nuts Both side faces ground
GEA SKF LGEV 2 4 Any
GEB TEXACO MULTIFAX EP1 (Replaced by GEE) X 4 Any
GED KLUEBER STABURAGS NBU 4 ALTEMP 4 Any
GEE TEXACO MULTIFAK EP1 4 Any
GEF SHELL 2858 4 Any
GEG DOW CORNING MOLYKOTE LONGTERM 2 PLUS 4 Any
GEH DEA PARAGON EP2 4 Any
GEJ SHELL CALITHIA EP2 4 Any
GEK SHELL SL 0275 4 Any
GEL SKF LGMB 2 4 Any
GEM SKF LGHB 2 4 Any
GEN SKF LGEM 2 4 Any
GEP SHELL RETINAX EP2 4 Any
GEQ DEA PARAGON EP3 LF 4 Any
GER ESSO (EXXON) EPIC EP 102 4 Any
GES SHELL ALVANIA WR2 4 Any
GET SHELL DARINA EP2 4 Any
GEU AMOCO AMOLITH EP2 4 Any
GEV SHELL Alvania 2760 B 4 Any
GFA KLUEBER PARALIQ GA 351 4 Any
GFB SKF LGFC 2 (Replaced by GFF) X 4 Any
GFD KLUEBER KLUEBERSYNTH UH1 14-151 4 Any
GFE KLUEBER KLUEBERSYNTH UH1 14-31 4 Any
GFF SKF LGFP 2 4 Any
GFG SIKEMA Fluolube 210 4 Any
GFH KLUEBER Kluebersynth UHI 64-62 4 Any
GHA MOLUB ALLOY TRIBOL 2115 4 Any
GHB KLUEBER PETAMO GHY 441 4 Any
GHD KLUEBER MICROLUBE GNY 202 4 Any
GHE DU PONT KRYTOX GPL 225 4 Any
GHF KLUEBER BARRIERTA L55/3 4 Any
GHG SHELL ALBIDA R2 4 Any

18
GHH KLUEBER BARRIERTA L55/1 4 Any
GHJ SHELL TIVELA COMPOUND A 4 Any
GHK KLUEBER KLUEBERPLEX BE 31-222 4 Any
GHL DU PONT KRYTOX GPL 205 4 Any
GHM NOX KLUEBER Japan NOXLUB-KF 1920 4 Any
GHN TRIBOL TRIBOL 4020/220-2 4 Any
GHP KYODO YUSHI MULTEMP ET.K 4 Any
GHQ KLUEBER KLUEBERSYNTH HB 72-52 4 Any
GHR POWER UP LUBRICANTS THIXOGREASE 4 Any
GHS ESSO POLYREX 4 Any
GHT KYODO YUSHI MULTEMP SC-C 4 Any
GHU SHELL RETINAX LX 4 Any
GHV KLUEBER PETAMO GHY 443 4 Any
GHW DU PONT KRYTOX GPL 227 4 Any
GHX MOBIL OIL MOBILTEMP 78 4 Any
GHY MOBIL OIL MOBILITH SHC100 4 Any
GHZ ESSO POLYREX 2 PLUS 4 Any
GJA BECHEM BERUTOX VPT 64-2 4 Any
GJB DU PONT KRYTOX GPL 224 4 Any
GJD KLUEBER STABOTHERM GH 461 4 Any
GJE FINA CERAN WR2 4 Any
GJF CHEVRON MULTIMOTIVE #1 4 Any
GJG DU PONT KRYTOX GPL 206 4 Any
GJH MOBIL OIL MOBILITH SHC 1500 4 Any
GJJ KLUEBER BARRIERTA L55/3 OX 4 Any
GJK KLUEBER Petamo GHY 443 (Replaced by GHV) X 4 Any
GJL RHENUS NORPLEX LKR2 4 Any
GJM WYNN`S GT 300 NF 4 Any
GJN EXXON Polyrex EM 4 Any
GJP DU PONT Krytox GPL 226 4 Any
GJQ BECHEM BERUPLEX KS 22 4 Any
GJR KYODO YUSHI MULTEMP SB-M 4 Any
GJS Du Pont - Krytox RUF 100 Replaces VL-BB1-0198 E 4 Any
GLA KLUEBER PDB 38 CX 1000 4 Any
GLB CHEMIE-TECHNIK VP 698 4 Any
GLD KYODO YUSHI MULTEMP PS-2 4 Any
GLE FINA CERAN LT 4 Any
GLF LUBCON Turmogrease High speed L182 4 Any
GLG KLUEBER BF 42-12 4 Any
GMA SHELL ALVANIA 2 4 Any
GMB SHELL ALVANIA 3 4 Any
GMD SKF LGWM 1 4 Any
GME SKF LGMT 2 4 Any
GMF SHELL SL 0321 4 Any
G-MF MRC Series Snap ring on non standard side, max type bearing and one shield 2 BB1
GMG KLUEBER ISOFLEX NCA 15 4 Any
GMH SHELL ALVANIA G2 4 Any
GMJ IMPERATOR RAFF HC2 4 Any
GMK GLEITMOLYPDAN GLEITMO 585 M 4 Any
GML Tian Jin Hangu, China IMPROVEMENT A 4 Any
GMM LUBCON (Turmolube) Turmogrease High speed L252 4 Any
GP INA series Noise tested bearing BN
G-SF MRC Series Snap ring on non standard side, s type bearing and one shield 2 BB1
GWA KLUEBER MICROLUBE GBU Y131 4 Any
GWB KLUEBER ASONIC GHY 72 4 Any
GWD IMPERIAL OIL UNIREX N2L 4 Any
GWE LUBCON THERMOPLEX I/300 FN 4 Any
GWF NIPPON GREASE GWF (A-3312) 4 Any
GWG KLUEBER ASONIC Q 74-73 4 Any
GWH KLUEBER ISOFLEX TOPAS NCA 52 4 Any
GWJ NIPPON OIL ENS 4 Any
GWK MOBIL OIL MOBILITH SHC460 4 Any
GWL MOBIL OIL MOBILITH SHC220 4 Any
GWM KLUEBER PETAMO GHY 133 4 Any
GWN KLUEBER BARRIERTA IEL 4 Any
GWP KLUEBER ASONIC HQ72-102 4 Any
GWQ MOBIL OIL MOBILITH SHC PM 4 Any
GWR KLUEBER ISOFLEX TOPAS L32 4 Any
GWS KLUEBER ISOFLEX TOPAS L152 4 Any
GWT KYODO YUSHI MULTEMP SRH 4 Any
GWU MOBIL OIL MOBILTEMP SHC 32 4 Any
GWV KLUEBER ISOFLEX TOPAS NCA 51 4 Any
GWX KLUEBER ISOFLEX TOPAS NB 152 4 Any
GWY KLUEBER KLUEBERPLEX BEM 34-132 4 Any
GWZ CHRISTIERNSSON AXEL UPL 5708 4 Any
GXA KLUEBER BARRIERTA SJF102 4 Any
GXB KLUEBER NOXLUB KF0921 4 Any
GXD ROYAL LUBRICANTS ROYCO 13 CF (Similar to Royco 13 D) 4 Any
GXE COSMO OIL WIDE GREASE WR 3 4 Any
GXF NIPPON GREASE NIGLUBE RM 4 Any
GXG NIPPON GREASE NIGACE SLH 4 Any
GXH CASTROL BRAYCOTE 631 RB 4 Any
GXJ KLUEBER KLUEBERSYNTH HLR 46-371 4 Any
GXK KLUEBER KLUEBERSYNTH HB 72-102 4 Any
GXL DU PONT KRYTOX GPL Anti Corrosion GR. 223 4 Any
GXM KLUEBER KLUEBERQUIET BQ 72-72 4 Any
GXN KYODO YUSHI Raremax 9B025+ 4 Any
GXP MOBIL OIL Mobilith SHC15 4 Any
GXQ KYODO YUSHI Multemp ET-NF 4 Any
GXR MOBIL OIL Mobilith SHC RR 221 4 Any
GXT KYODO YUSHI WT4 4 Any
H Components of material other than normal and/or with componets specially hardened 4 Any
H ADR Series AY, W 60, Non separable angular contact ball bearings. Contact angle 15º 1 BA1
60, 62, WA 4, WA 7
H Bevel gears Altered design, material nitrided. Spheroidal graphite cast iron
H Pressed cages. Hardened steel cage with snaptype pockets 3 BA2; BC1
H Prefix K Pinion quality X 4 BT1
H GAMET bearings Precision tapered roller bearings (GAMET). Outer ring with flange, double row 2 BT2

19
H Hydrostatic bearing feature 2 BL
H Bushing Lubrication holes in plain bushings of wrapped bronze material 2 BP
H Machine tool spindle units Hydrostatic bearing arrangement
H Y-bearing units Bearing from serie 17262(00), Series 62-2RS with spherical outer diameter, no lubrication hole
H Roller bearing units Held unit. US made
H Reduced tolerance for diameter under roller set of needle roller bearing without inner ring. The 4 BN
figures following H indicate the tolerance range in um, e.g. H+27+20
H OH adapter sleeves Oil inlet at threaded side
H+..+.. INA series Tolerance for diameter under roller set reduced (e.g. /H+20+27). Tolerance values in μm BN
H11 Balls and rollers Silicone nitride, Material Class I, Impact resistance Class I ,Inspection Level 1 4
H12 Balls and rollers Silicone nitride, Material Class II, Impact resistance Class II inspection Level 2 4
For RB >12,7 mm : Impact resistance Class I ,Inspection Level 2
H13 Balls and rollers Silicone nitride, Material Class II, Impact resistance Class II ,Inspection Level 3 4
HA Y-bearing units Bearings from serie 1762(00)-2RS1
HA0 Case hardening. All parts case hardened 4 Any
HA0 Throughhardening. All parts throughhardened 3, 4 BT
HA1 Case hardening. Outer and inner ring case hardened 4 Any
HA1 Throughhardening. Outer and inner ring throughhardened 3, 4 BT
HA2 Case hardening. Outer ring case hardened 4 Any
HA2 Throughhardening. Outer ring throughhardened 3, 4 BT
HA3 Case hardening. Inner ring case hardened 4 Any
HA3 Throughhardening. Inner ring throughhardened 3, 4 BT
HA4 Case hardening. Outer ring, inner ring and rolling elements case hardened. 4 Any
HA4 Throughhardening. Outer ring, inner ring and rolling elements throughhardened 3, 4 BT
HA5 Case hardening. Rolling elements case hardened 4 Any
HA5 Throughhardening. Rolling elements throughhardened 3, 4 BT
HA6 Case hardening. Outer ring and rolling elements case hardened 4 Any
HA6 Throughhardening. Outer ring and rolling elements throughhardened 3, 4 BT
HA7 Case hardening. Inner ring and rolling elements case hardened 4 Any
HA7 Throughhardening. Inner ring and rolling elements throughhardened 3, 4 BT
HA8 Case hardening. Cage case hardened 4 Any
HA8 Throughhardening. Cage throughhardened 3, 4 BT
HB OH adapter sleeves Suffix H plus oil groove also in bore
HB OK-couplings Couplings with built in tool
HB1 Bainite hardening. Outer and inner ring bainite hardened 4 Any
HB2 Bainite hardening. Outer ring bainite hardened 4 Any
HB3 Bainite hardening. Inner ring bainite hardened 4 Any
HB4 Bainite hardening. Outer ring, inner ring and rolling elements bainite hardened. 4 Any
HC4 Ceramic material. Outer ring, inner ring and rolling elements of ceramic material 4 Any
HC5 Ceramic material. Rolling elements of ceramic material 4 Any
HE1 Extra refined steel. Outer and inner ring of extra refined steel 4 Any
HE2 Extra refined steel. Outer ring of extra refined steel 4 Any
HE3 Extra refined steel. Inner ring of extra refined steel 4 Any
HE4 Extra refined steel. Outer ring, inner ring and rolling elements of extra refined steel 4 Any
HE5 Extra refined steel. Rolling elements of extra refined steel 4 Any
HE7 Extra refined steel. Inner ring and rolling elements of extra refined steel 4 Any
HEA4 Extra refined steel case hardening. Outer ring, inner ring and rolling elements of extra 4 Any
refined steel and case hardened
HG Y-bearing units Bearings from Series 17262(00) B2RS1
HH High speed steel 4 Any
HJ Induction hardening 4 Any
HL Shell hardening 4 Any
HM1 Martensite hardening. Outer and inner ring martensite hardened 4 Any
HM2 Martensite hardening. Outer ring martensite hardened 4 Any
HM3 Martensite hardening. Inner ring martensite hardened 4 Any
HN1 Carbonitride hardening. Outer and inner ring carbonitride hardened 4 Any
HN2 Carbonitride hardening. Outer ring carbonitride hardened 4 Any
HN3 Carbonitride hardening. Inner ring carbonitride hardened 4 Any
HR Bearing parts of non-metallic materials 4 Any
HSLH1 Seal Rubber (NBR) moulded on a reinforcement plate. Hammer Lip (double lip) design. 4
HSLH2 Seal Rubber (FKM) moulded on a reinforcement plate. Hammer Lip (double lip) design. 4
HSLH3 Seal Rubber (ACM) moulded on a reinforcement plate. Hammer Lip (double lip) design. 4
HSLH5 Seal Rubber (HNBR) moulded on a reinforcement plate. Hammer Lip (double lip) design. 4
HSLL1 Seal Rubber (NBR) moulded on a reinforcement plate. Hammer Lip (single lip) design. 4
HSLL2 Seal Rubber (FKM) moulded on a reinforcement plate. Hammer Lip (single lip) design. 4
HSLL3 Seal Rubber (ACM) moulded on a reinforcement plate. Hammer Lip (single lip) design. 4
HSLL5 Seal Rubber (HNBR) moulded on a reinforcement plate. Hammer Lip (single lip) design. 4
HT Grease: GJN for bearings D ≤ 62 mm and HT22 for bearings D > 62 mm 4 BB1
HT10 Chevron Calol OHT X 4 Any
HT12 Chevron Industrial Grease Heavy X 4 Any
HT2 Esso Andok C 4 Any
HT20 Chevron BRB2 X 4 Any
HT21 Shell Dolium R X 4 Any
HT22 Esso Unirex N3 4 Any
HT24 Esso Unirex s2 4 Any
HT30 Chevron Industrial Grease Medium 4 Any
HT41 Dow Corning Molykote BR2 (GE, BR2-5) 4 Any
HT42 Shell S 7189 4 Any
HT43 SKF, Maintenance Wälzerol FL (Replaced by MT33) X 4 Any
HT51 Chevron SRI 2 (SKF 49) (Replaced by GJN) 4 Any
HT54 Mobile Temperature No. 1 4 Any
HT55 BP Energol Insoluble in Oil X 4 Any
HT58 Klüber Staburags N 12 MF 4 Any
HT59 Aeroshell Grease No. 12 4 Any
HT60 Caltex UTG 500 4 Any
HT61 Shell Darina R2 4 Any
HT62 Shell Darina PX 4 Any
HT63 Castrol Spheerol BN5 4 Any
HT71 Aeroshell Grease No. 16 4 Any
HT72 Esso Andok 260 4 Any
HT73 Elf High Temperature grease 4 Any
HT75 Bardahl HT 4 Any
HT8 Texaco Unitemp 500 X 4 Any
HT9 Texaco High Temperature Grease (DTD 878 A) X 4 Any
HTx Through hardening (used when case hardening is std. TRB produced in the Mexico and USA) 4 BT
x denotes the digit which defines the part(s) of the bearing that are through hardened:
HU4 Stainless steel, unhardenable. Outer ring, inner ring and rolling element of stainless 4 Any
steel unhardenable material

20
HU8 Stainless steel, unhardenable. Cage of stainless steel unhardenable material 4 Any
HU8A Stainless steel, AFNOR Z8C17 or X6Cr17 (EN 10088-2), unhardenable. Cage of stainless 4 Any
steel unhardenable material
HU9 Stainless steel, unhardenable. Other part, e.g. shield of stainless steel unhardenable material 4 Any
HU9A Stainless steel, AFNOR Z8C17 or X6Cr17 (EN 10088-2), unhardenable. Other part, e.g. shield 4 Any
of stainless steel unhardenable material
HU9B Stainless steel, AISI 304 or X5CrNi 10-10 (EN 10088-2, unhardenable. Other part e.g. shield 4 Any
of stainless steel unhardenable material
HU9C Stainless steel, AFNOR Z12CN 18.09 or X10CrNi 18-8 (EN 10088-2, unhardenable. Other part 4 Any
e.g. snap ring of stainless steel unhardenable material
HV Stainless steel. Inner and outer ring and rolling elements hardened. Other parts unhardened 4 Any
HW Stainless steel, hardenable 4 Any
HV0 All parts of stainless steel 4 Any
HV1 Outer and inner ring of stainless steel 4 Any
HV2 Outer ring of stainless steel 4 Any
HV3 Inner ring of stainless steel 4 Any
HV4 Outer ring, inner ring and rolling elements of stainless steel 4 Any
HV5 Rolling elements of stainless steel 4 Any
HV6 Outer ring and rolling elements of stainless steel 4 Any
HV7 Inner ring and rolling elements of stainless steel 4 Any
HV8 Cage of stainless steel 4 Any
HV9 Other part e.g. shield of stainless steel 4 Any
IS INA series Lubricating hole(s) in inner ring. The figure following IS indicates the number of holes BN
J Needle rollers Inch sizes (Bremen) Roller shape: flat sheared-end 4
J Pressed cage of unhardened steel 3 Any
J Antifriction insert of unhardened steel in outer ring 1 BL
J New Departure, prefix G BB1
J Y-bearing units. Bearings from Series TRE-S
J1 Inner ring of unhardened steel 4 BL
J1 Pressed cage. Modified J-design 3 Any
J2 Outer ring of unhardened stainless steel 4 BL
J2 Pressed cage. Modified J-design, e.g. reduced plate thickness 3 Any
J21 Cages Pressed cage from disk,cut/punched pockets,dimension different from J2 3 BS2
J21 Pressed cage. Modified J-design, e.g. reduced plate thickness 3 BT1
J22 Cages Pressed cage from welded tube material without pre-punsch,cut/punched pockets 3 BS2
J22 Pressed cage. Modified J-design, e.g. reduced plate thickness. Pre drawn 3 BT1
J23 Cages Pressed cage from welded tube material with pre-punsch,cut/punched pockets 3 BS2
J24 Cages Fluid form pressed cage, cut/punched pockets 3 BS2
J25 Cages Pressed turning cage, cut/punched pockets 3 BS2
J29 Pressed cage. Modified J-design, e.g. reduced plate thickness 3 BT1
J3 Cages Pressed cage from disk, laser cut pockets 3 BS2
J3 Inner and outer ring of unhardened steel 4 BL
J3 Pressed cages. Modified J-design 3 BB1; BC1; BT1
J31 Cages Pressed cage from disk, dimensions different from CJ3, laser cut pockets 3 BS2
J31 Cages The pressed retaining nose modified to slit, Laser cut 3 BC1
J31R Cages Pressed cage from disk, dimensions different from CJ3R, laser cur pockets with standard 3 BS2
cup (radius)
J32 Cages Pressed cage from welded tube material without pre-punsch, laser cut pockets 3 BS2
J32R Cages Pressed cage from welded tube material without pre-punsch, laser cut pockets with standard BS2
cup (radius)
J33 Cages Pressed cage from welded tube material with pre-punsch, laser cut pockets 3 BS2
J33R Cages Pressed cage from welded tube material with pre-punsch, laser cut pockets with standard BS2
cup (radius)
J34 Cages Fluid form pressed cage, laser cut pockets 3 BS2
J34R Cages Fluid form pressed cage, laser cut pockets with standard cup (radius) BS2
J35 Cages Pressured turning cage, laser cut pockets 3 BS2
J35R Cages Pressured turning cage, laser cut pockets with standard cup (radius) 3 BS2
J3P Pressed cages. Modified J-design, pre-riveted, smaller rivet holes 3 BB1
J3R Cages Pressed cage from disk, laser cut pockets with standard cup (radius) 3 BS2
J3W Pressed cages. Modified J-design, welded 3 BB1; BC1; BN
J4 Pressed cages. Modified J-design 3 BA1; BB1; BC1;
BT1
J5 Pressed cages. Modified J-design 3 BB1; BC1; BT1
J6 Pressed cages. Modified J-design 3 BB1; BT1
J7 Pressed cages. Modified J-design 3 BC1
J9 Cages Pressed cages. Modified J6-design 3 BB1; BD1
J91 Cages Pressed cages. Modified J9-design 3 BB1
J92 Cages Pressed cages. Modified J9-design 3 BS2
J9R Cages Pressed cages. Modified J9-design 3 BD1; BT1
JA Rolling bearings Pressed cage. Unhardened steel cage, centred in the outer ring 3 Any
JBCS INA series Welded sheet steel cage, centered on rollers (e.g. K100x108x30 JBCS) BN
JBS INA series Welded sheet steel cage BN
JE Pressed cage. Unhardened steel cage, phosphated 3 BD1; BT1
JEM Pressed steel cage , C3 radial internal clearance, sealed bearing is 3;4 BB1
prelubricated with low noise and high temperature grease
JH Pressed cage. Case hardened steel cage for needle roller bearings 3 BN
JP Y- bearing units Bearings from Series TRE.SQ
JQ Y-bearing units Bearings from Series TRE-SQ + SV-T--Q
JR Y-bearing units Bearings from Series TRE-S + SV-T--R
JR Pressed cage. Unhardened steel cage for large thrust ball bearings. Two washers riveted together 3 BD; BE
JW Cages Modified J-design. Welded instead of riveted 3 BB1
JY Pressed unhardened steel cage for spherical roller bearings. Made with Y-cage tools and 3 BS2
finished by hand
K Tapered bore, taper 1:12 on diameter.The nominal bore diameter is at the small end of the 2 Any
taper. For standard bearings with metric dimensions the nominal bore is equal to that of
corresponding bearings with cylindrical bore. For standard bearings with inch dimensions the
nominal bore is usually a metric standard dimension and therefore does not correspond to that of the
equivalent cylindrical bore bearing, e.g. RL 9 K, d = 30 mm; RL 9, d = 1 1/8 in.
K Bearing with inner ring tapered bore , taper 1 : 30 2 BL
Bearing with pivot, tapered seating on pivot, taper 1 : 10
K Hubs, Size GH, GK Tapered roller bearing are used
K Needle rollers Roller shape: hemi-spherical ends 4
K Rivets Material: copper 4
K Y-bearing units. Bearings from serie 3620(00) ATN. Narrow series, bearing on adapter sleeve, no lubrication hole
K Nuts Kit including mounting tool
K0 Machine tool spindle units Internal taper: morse taper 0
K004 Machine tool spindle units Internal taper: metric taper 4
K006 Machine tool spindle units Internal taper: metric taper 6
K030 Machine tool spindle units Internal taper: to ISO 30

21
K080 Machine tool spindle units Internal taper: metric taper 80
K1 Machine tool spindle units Internal taper: morse taper 1
K11 Tapered bore, taper 1 : 11 on diameter. The nominal bore diameter is at the small end of the 2 Any
taper and is equal to that of corresponding bearings with cylindrical bore.
K100 Machine tool spindle units Internal taper: metric taper 100
K120 Machine tool spindle units Internal taper: metric taper 120
K140 Machine tool spindle units Internal taper: metric taper 140
K16 Tapered bore, taper 1 : 16 on diameter. The nominal bore diameter is at the small end of the 2 Any
taper and is equal to that of corresponding bearings with cylindrical bore.
K160 Machine tool spindle units Internal taper: metric taper 160
K2 Machine tool spindle units Internal taper: morse taper 2
K3 Machine tool spindle units Internal taper: morse taper 3
K30 Tapered bore, taper 1 : 30 on diameter. The nominal bore diameter is at the small end of the 2 Any
taper and is equal to that of corresponding bearings with cylindrical bore.
K4 Machine tool spindle units Internal taper: morse taper 4
K5 Machine tool spindle units Internal taper: morse taper 5
K6 Machine tool spindle units Internal taper: morse taper 6
KA Y-bearing units Bearings from Series YSA 2
KF Y-bearing units Bearings from Series YSA 2-2F
KG Y-bearing units Bearings from Series 3620(00) BTN
KR Y-bearing units Bearings from Series YSA 2-2RF
KS Pop release bearings Stepped taper bore 2 BJ2; BS2
L Cylindrical rollers 'Langrolle', specific tolerances 4
L Machined cages. Light alloy cage, usually centred on the rolling elements 3 Any
L Whirled lubrication groove system in OR or IR 'sphere' 1 BL
L Antifriction lining of light metal in outer ring 1 BL
L Adapter left hand threads 2 BAC
L Y-bearing units Bearings from series 4132(00). Wide series, no locking grub screws in inner ring, land riding
seals, lubrication hole
L Rivet Made of light alloy 4
L Adapter sleeves With low section nut locking for CARB
L Inserts for seals RS1PL
L Cover set or assembly for 'non locating bearing' SBD housing
L Ball and roller screw assemblies, left hand threads
L1 Inner ring of light metal 4 BL
L10 Y-bearing units No locking collar included
L101 Snap ring groove on opposite side to filling slot 2 BBF
L102 Grease hole on same side as locking collar 2 BBY
L103 One seal only, on side opposite to locking collar 2 BBY
L105 One seal only, on same side as locking collar 2 BBY
L106 One 1/16" dia. hole drilled through snap ring groove 2 Any
L2 Outer ring of light metal 4 BL
L202 Kre to C04 tolerances 4 Any
L3 Inner and outer ring of light metal 4 BL
L402 Bearing hand-packed with grease, 1/3 full 4 Any
L523 Angular contact ball bearings. Matched pair consisting of one single thrust and one double 4 BA
thrust bearing
L801 Ring hardness Rc 62-64 4 Any
LA Machined cages. Light alloy cage, centred in the outer ring 3 Any
LA Y-bearing units Bearings from series 4132(00) A or 4132(00) DA, A = bearings with two flinger plates
LA Balls and rollers Material: Aluminium 4
LAS Machined light alloy cage with lubrication grooves, centered in the outer ring 3 BB1
LB Machined cages. Light alloy cage, centred on the inner ring 3 Any
LB Balls and rollers Material: bronze 4
LC Machined cages. Light alloy cage, ball centred, toroidal form of cage pockets. 3 BA; BB
LD Y-bearing units (L + D) Bearings from series 4132(00) D. Wide series, no locking ring, grub screws in inner
ring, land riding seals, lubricating hole and plus tolerance for metric bore diameter
LH Nuts Left hand threads
LHT1 Dow Corning Molykote 33 Light 4 Any
LHT20 Aeroshell Grease No. 15 A 4 Any
LHT21 Dow Corning Molykote 33 Medium 4 Any
LHT22 Dow Corning Molykote 44 Light 4 Any
LHT23 Kyodo Yushi SRL 4 Any
LHT30 Dow Corning Molykote 44 medium 4 Any
LHT31 Dow Corning Molykote 43 medium 4 Any
LHT32 Dow Corning Molykote 99 X 4 Any
LHT41 Mobil grease 22 4 Any
LHT42 Klüber Isoflex Super LDS 18 4 Any
LHT43 Mobil Grease 27 X 4 Any
LHT51 Aeroshell Grease No. 6 4 Any
LHT53 Elf Aviation Grease 10 4 Any
LHT54 Chevron BRB 2 (Renumbered to HT20) X 4 Any
LHT55 Mobil Grease 28 4 Any
LHT56 Klüber Synthesin LDS 1801 X 4 Any
LHT61 Aeroshell Grease No. 5 4 Any
LHT62 Midland Silicone MS 44 4 Any
LHT63 Aeroshell Grease No. 15 4 Any
LHT64 Aeroshell Grease No. 7 4 Any
LM Balls and rollers Material: brass 4
LMx Cylindrical rollers Length tolerance. M = minus. The figure (repr. by x) gives the mean deviation from normal 4
LN Cylindrical rollers Length tolerance. N = zero 4
LO10 Aeroshell Fluid 1 4 Any
LO11 Esso Turbo oil TJ 15 4 Any
LO20 Shell Tellus oil 11 4 Any
LO21 Texaco Light oil 1692 4 Any
LO22 Shell Tellus oil C 5 4 Any
LO6 Esso Univis P12 4 Any
LO7 Aeroshell Fluid 12 4 Any
LO9 Esso Aviation instrument oil H38 4 Any
LP Machined cages. Light alloy cage, centred on one or other of the rings, with slotted or 3 Any
broached pockets
LPS Machined cages. Light alloy cage, centred on one or other of the rings, with slotted or 3 Any
broached pockets and lubrication grooves
LPx Cylindrical rollers Length tolerance. P = plus. The figure (repr. by x) gives the mean deviation from normal 4
LRS1 LS1 seal at one side and RS1 seal at the other side of the bearing 2 BB1
LS Contact ('land-riding') seal at one side of the bearing. The seal used for deep groove ball 2 BA; BB
bearings consists of a reinforcement plate with rubber moulded to it; that used for Y-bearings of a
rigid plate shield to which rubber is moulded. The inner ring has no recesses.

22
LS1 Contact ('land-riding') seal at one side of the bearing. The seal used for deep groove ball 2 BA; BB
bearings consists of a reinforcement plate with rubber moulded to it; that used for Y-bearings of a
rigid plate shield to which rubber is moulded. The inner ring has no recesses.
For operating temperatures of -40 to +120 º C
LS2 Contact ('land-riding') seal at one side of the bearing. The seal used for deep groove ball 2 BB;BL
bearings consists of a reinforcement plate with rubber moulded to it; that used for Y-bearings of a
rigid plate shield to which rubber is moulded. The inner ring has no recesses.
It will withstand continous operation at temperatures up to + 175º C
LST Three lip seal BBY
LSZ (LS +Z) Contact 'land riding' seal at one side and a shield at the other. 2 BB; BA2
LT Grease LT20 for all sizes 4 BB1
LT01 LT10 alt. LT20 4 Any
LT10 Esso Beacon 325 (LT01 standard) 4 Any
LT20 Klüber Isoflex LDS 18 Special A (LT01 alternative) 4 Any
LT30 Aeroshell Grease No. 11 4 Any
LT41 Esso 5114 EP 4 Any
LT50 SKF Imperator 1036 X 4 Any
LT61 Aeroshell Grease No. 1 4 Any
LX Y-bearing units Bearings from Series 4172(00)
Lxxx Rolling bearings Bearings with coated or plated components 4 Any
LZ Shields 'Land riding', straight anchorage 4
LZP Shields 'Land riding', curved and split periphery anchorage 4
M Rolling bearings Machined brass cage, usually centred on the rolling elements 3
M Needle rollers Inch sizes. Roller shape: Spherical end roller. Deviates from standard as to heat treatment or 4
Bremen sizes dimensional data
M MRC Series Max type bearings 1 BB1; BA1
M Rivets Material: Monel metal 4
M Bushing Sliding material, Polyacetal (POM) 2 BP
M Antifriction lining of brass or bronze in outer ring 1 BL
M Y-bearing housings Housing modified (only in housing designation)
M./M. INA series Diameter tolerance for needle rollers (e.g. M2/M4, diameter tolerance = -2 to -4 μm BN
M1 Rolling bearings Modified machined brass cage 3
M1 Inner ring of brass or bronze 4 BL
M1 Bushing Solid bronze material CuSn5Pb5Zn5 4 BP
M14 Machined cages. M1 +M4 3 BA1
M2 Machined brass cage, usually centred on the rolling elements 3 BA; BS2; BQ;
BB2; BC1
M2 Outer ring of brass or bronze 4 BL
M2AS Cages Modified MAS-design 3 BB1
M2P Machined brass cage, centred on one or other of the rings, with slotted or 3 BC1
broached pockets
M2PS M2P cage with oil groove 3 BC1
M3 Inner and outer ring of brass or bronze 4 BL
M3 Machined brass cage, usually centred on the rolling elements 3 BC1; BS2
M36 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M4 Machined cages. Brass cage of matr. D75082 (brass grade 82) 3 BA1; BB1
M46 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M6 Machined brass cage, usually centred on the rolling elements 3 BC1
M61 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M62 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M63 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M65 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M66 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M67 Cages Machined brass cage, usually centred on the rolling elements 3 BC1
M8 Machined cages. Brass cage of matr. D75084 (brass grade 84) 3 BA1; BB1; BC2
M9 Machined brass cage, usually centred on the rolling elements 3 BC1
MA Rolling bearings Machined cages. Brass cage, centered in the outer ring 3 Any
MA1 Cages Machined cages. Modified brass cage, centered in the outer ring 3 BB1; BC1
MA6 Machined cages. Modified brass cage, centered in the outer ring 3 BC1
MA67 Cages Machined cages. Modified brass cage, centered in the outer ring 3 BC1
MAR Machined cages. Brass cage, centered in the outer ring 3 BB1
MAS Machined cages. Brass cage, centered in the outer ring with lubrication grooves 3 BB1; BC1
MB Rolling bearings Machined cages. Brass cage, centered on the inner ring 3
MB1 Machined cages. Brass cage, centered on the inner ring, larger width, wider than 3 BSC
the inner ring width
MB6 Machined cages. Brass cage, centered on the inner ring 3 BC1
MBS Machined cages. Brass cage, centered on the inner ring with lubrication grooves 3 Any
MC Brass cage with toroidal pocket shape 3 BB1
MC Product Class 2 Material Grades for cast materials. Grey Iron
MCx Product Class 2 Material Grades for cast materials. Grey Iron
MD Product Class 2 Material Grades for cast materials. SG Iron
MDx Product Class 2 Material Grades for cast materials. SG Iron
MK Product Class 2 Material Grades for sinter material
ML 'New' ring centered MP cage 3 BC2
ML Product Class 2 Material Grades for cast materials. Cast light alloy
MLx Product Class 2 Material Grades for cast materials. Cast light alloy
MO10 Lubrication. Medium viscosity oil. Esso Teresso 150 4 Any
MP Rolling bearings Machined brass cage, centred on one or other of the rings, with slotted or 3 Any
broached pockets
MP HEIM-series Shield at one side of the bearing X 4 BB1
MP1 Cages Machined brass cage, centred on one or other of the rings, with slotted or 3 BC1
broached pockets
MP2 Cages Machined brass cage, centred on one or other of the rings, with slotted or 3 BC1
broached pockets
MP3 Modified cage MP 3 BC1
MP3D MP3 plus MPD cage 3 BC1
MP9 'New' ring centered cage 3 BC1
MPD MP cage with 'roller drop' 3 BC1
MPP HEIM-series Shield at each side of the bearing X 4 BB1
MPS Machined brass cage, centred on one or other of the rings, with slotted or broached 3 Any
pockets and lubrication grooves
MR 'New' roller centered MP cage 3 BC
MS Product Class 2 Material Grades for cast materials. Cast steel
MSx Product Class 2 Material Grades for cast materials. Cast steel
MT Grease: LT10 for bearings in Diameter Series 8 and 9 with D ≤ 30 mm 4 BB1
MT47 for bearings in Diameter Series 8 and 9 with 30 < D ≤ 62 mm and Diammeter Series 0, 1, 2, 3,
4, D ≤ 62 mm
MT33 for bearings in all Series with D > 62mm
MT11 Texaco Regal Starfak Special (Premium 2) 4 Any

23
MT19 Shell Alvania R2 4 Any
MT21 Walkers (Century oil) Lupus A3 4 Any
MT22 Molub Alloy BRB 572 4 Any
MT30 SKF 65 C 4 Any
MT32 SKF 28 X 4 Any
MT33 Shell Alvania RL3 4 Any
MT34 Mobil Oil Grease 234 X 4 Any
MT35 Shell Alvania EP2 (Retinax A) Replaced by VT143 X 4 Any
MT37 Klüber Staburags NBU12 4 Any
MT38 Texaco Multifak EP2 4 Any
MT39 Esso Beacon 2 4 Any
MT40 Esso Beacon EP2 4 Any
MT41 Shell V 3817 (KS) 4 Any
MT42 Mobil Oil Gargoyle No. 3 X 4 Any
MT43 Calypsol WIA (1002) X 4 Any
MT44 Rheinpreußen (Texaco) Glissando FW42 4 Any
MT45 SKF Wälzerol FNK X 4 Any
MT46 Calypsol WIBD 4 Any
MT47 Shell Alvania RLQ2 (lead free) 4 Any
MT48 Shell FP3 X 4 Any
MT54 ELF GL 300 4 Any
MT57 Shell APL 701 X 4 Any
MT58 Mobil Oil Mobilux No. 3 4 Any
MT59 Shell Darina 2 4 Any
MT60 Elf Multi (1145) 4 Any
MT61 Mobil Oil Larital 2 X 4 Any
MT62 Shell Alvania RA 4 Any
MT63 Castrol Spheerol HM Special 4 Any
MT64 Mobil Oil Mobilplex 47 4 Any
MT65 Aeroshell Grease 6 X 4 Any
MT67 Mobil Oil Mobilplex 48 4 Any
MT71 Esso Multipurpose EC 3212 4 Any
MT80 Fiat Jota 4 CS X 4 Any
MT90 Shell Multipurpose Grease No. 2 (Made in India) 4 Any
MT96 Shell Retinax AX 4 Any
N Castors and forks Made in Netherlands
N Y-bearing housing Housings of composite material with nipple assembled
N SH bushings Blacknitried, Nitrotec
N Radial bearings. Snap ring groove in outer ring 2 Any
N Spindle units (bearing Normal - Two cylindrical roller bearings and one angular contact thrust ball bearing
arrangement)
N Housings Hole for nipple. Standard
N Sleeves and nuts Blacknite treated
N Roller bearing units Pop release design. US made
N1 One locating slot in outside edge of outer ring or housing washer 2 Any
N1 Housings Oil inlet
N1 Inner ring case carburized 4 BL
N2 Outer ring case carburized 4 BL
N2 Two diametrically opposed notches at one outside corner of the outer ring or housing washer. 2 Any
N2 Housings Hole for nipple R¼ (N2T=KR¼)
N3 Housings Hole for nipple R 1/8
N3 Inner and outer ring carburized 4 BL
N4 Radial bearings.(N + N2) Notches at the side opposite the snap ring groove 2 Any
N4R Radial bearings. N4 and snap ring. Notches at the side opposite the snap ring groove 2 Any
including the appropriate snap ring for axial location of the bearing
N6 Radial bearings. (N + N2). Notches at the same side as the snap ring groove 2 Any
N6R Radial bearings. N6 and snap ring. Notches at the same side as the snap ring groove 2 Any
including the appropriate snap ring for axial location of the bearing
NA Parts not interchangeable (SKF Schweinfurt) X 1 BC
NA Snap ring groove at the opposite side of the filling slot 2 BBF
NAR Snap ring groove with snap ring at the opposite side of the filling slot 2 BBF
NB Snap ring groove , located opposite side to the locating screw 2 BBY
NL NICE Series Bearing with seal on one side 2 BB1
NR Radial bearings. Snap ring groove (as N) provided with appropriate snap ring for axial location 2 Any
of the bearing
NS NICE-series Rolling bearings of NICE-series. No shields 2
NS High friction contacting seal at one side of the bearing 2 BSC
O SAF-housing Hydraulic assist adaptors
P BT metric size Injection moulded cages, glass-fibre reinforced plastic 3 BA1; BC1;BT1
P Outer ring in two parts to allow for adjustment of the internal clearance 2 BS2
P Cylindrical and tapered Pierced rollers 4
rollers
P Track runner bearings Cylindrical runner surface 2 BB1; BC1
P Tapered roller bearings (GAMET) Extended outer ring with incorporated springs for preloading X 2 BT1
P Y-bearing units Bearings from series 4782(00). Narrow series, excentric locking ring, RS-seals, no lubrication hole
P Antifriction lining of sintered material in outer ring 1 BL
P Sealed adapter 4 BAC
P KM nuts Made of sinter material when not standard
P INA series Sealing ring at one side of bearing BN
P1 Injection moulded cages, glass-fibre reinforced plastic, material Amodel, number of ball 3 BA1
pockets equal to M design.
P1 Injection moulded cages, glass-fibre reinforced plastic, material Amodel. 3 BC1
P1 Inner ring of sintered material 4 BL
P2 Outer ring of sintered material 4 BL
P3 Inner and outer ring of sintered material 4 BL
P4 Antifriction lining of sintered material on inner ring 1 BL
P4 Dimensional and running accuracy to ISO class 4 (greater than P5) 4 Any
P4A High precision bearings. Improved ISO class 4 dimensional and running accuracy 4 Any
P4B High precision bearings. Improved ISO class 4 dimensional and running accuracy X 4 Any
P4C High precision bearings. Improved ISO class 4 dimensional and running accuracy 4 Any
P5 Dimensional and running accuracy to ISO class 5 (greater than P6) 4 Any
P51 Combination of P5 and C1 4 Any
P6 Dimensional and running accuracy to ISO class 6 4 Any
P63 Combination of P6 and C3 4 Any
P638A Combination of P6, C3 and C8A 4 Any
P66 Combination of P6 and C6 4 Any
PA Injection moulded cages, glass-fibre reinforced plastic, outer ring centered 3 BC1
PA Y-bearing units Bearings from series 4542(00) with land riding seals

24
PA Roller bearing units Housing with take-up frame (for TRH) US made
PA7 Dimension and running accuracy as to ABMA class 7 4 Any
PA9 Dimension and running accuracy as to ABMA class 9 4 Any
PA97 Dimension accuracy to ABMA class 9, running accuracy to ABMA class 7 4 Any
PA9A Improved ABMA class 9 dimension and running accuracy 4 Any
PA9B Improved ABMA class 9 dimension and running accuracy 4 Any
PAB1 Precision quality for aircraft engine and transmission bearing 4 Any
PAB2 Precision quality for aircraft engine and transmission bearing 4 Any
PAB3 Precision quality for aircraft engine and transmission bearing 4 Any
PAB4 Precision quality for aircraft engine and transmission bearing 4 Any
PAB5 Precision quality for aircraft engine and transmission bearing 4 Any
PBC Matched bearing sets Five bearings: back to back plus counter tandem 4 BA; BB
PBT Matched bearing sets Five bearings: back to back plus tandem 4 BA; BB
PEX Improved precision and quality class 4 BC
PF Y-bearing units Y-Pop Bearings from Series YSP 2-2F
PFC Matched bearing sets Five bearings: face to face plus counter tandem 4 BA; BB
PFT Matched bearing sets Five bearings: face to face plus tandem 4 BA; BB
PG Y-bearing units Bearings from series 4782(00) VSB, VSB = Lubrication hole
PH Injection moulded cage of PEEK material.Glass Fibre reinforced 15% (rolling elements centered) 3 BA1; BC1
PH Y-bearing units Bearings from series 4542(00) VSB, VSB = Lubrication hole
PH1 Injection moulded cage of ST-HTP material 3 BA1; BC1
PH5 TN9 made of 'high temp' material PEEK. Carbon fibre 30% reinforced (rolling elements centered) 3 BA1; BC1
PHA Injection moulded cage of PEEK material. Glass Fibre reinforced 15% (centered in the outer ring) 3 BA1; BC1
PHAS Injection moulded cage of PEEK material. GF 15% centered in the outer ring, lubricant grooves 3 BA1; BC1
PM Y-bearing units Y-Pop Bearings from Series YSP 2
PP INA series Sealing ring at both sides of bearing BN
PR Outer ring as P with calibrating spacer ring between outer ring parts 2 BS2
PR Y-bearing units Y-Pop Bearings from Series YSP 2-2RF
PS Y-bearing units Y-Pop Bearings from Series YSP 2 S
PT Matched bearing sets Five bearings in tandem. Loading case: radial and thrust 4 BA; BB
Pxx Product Class 2 Special coating/painting specifications
PZ Plastic shield (non contact seal), at one side of the bearing, inner ring has no recesses. X 2 BB1
Replaced by Z
Q Low vibration and noise 4 BT
Q Balls Balls produced according to new technology 4
Q04 Super extra low vibration peaks 4 BB1
Q05 Extra low vibration peaks 4 Any
Q06 Vibration peaks lower than normal 4 Any
Q07 Vibration peaks within normal limits. 4 Any
Bearings and packages marked Q07 only on special request
Q4 Super extra low vibration level 4 BB1
Q44 Combination of Q4 and Q04. Super extra low level and peaks 4 BB1
Q5 Extra low vibration level (Replaces C7) 4 Any
Q55 Combination of Q5 and Q05. Extra low vibration level and peaks 4 Any
Q6 Vibration level lower than normal (Replaces C6) 4 Any
Q66 Combination of Q6 and Q06. Vibration level and peaks lower than normal 4 Any
Q7 Vibration level within normal ranges. Bearing and package marked Q7 only on special request 4 Any
Q77 Combination of Q7 and Q07. Vibration level and peaks within normal ranges. 4 Any
Bearing and package marked Q77 only on special request
QBC Matched bearing sets Four bearings: back to back plus counter tandem 4 BA; BB
QBT Matched bearing sets Four bearings: back to back plus tandem 4 BA; BB
QE4 Increased running accuracy to P4, dimensional accuracy and exacting requirements on 4 BB
vibration level
QE5 Increased running accuracy, dimensional accuracy and exacting requirements on vibration 4 BB
level to meet requirements for certain electric motor application
QE6 Dimensional and running accuracy to P6 and vibration to Q66. 4 BB
QFC Matched bearing sets Four bearings: face to face plus counter tandem 4 BA; BB
QFT Matched bearing sets Four bearings: face to face plus tandem 4 BA; BB
QR Matched bearing sets Four bearings. Loading case: radial only 4 BB; BC
QT Matched bearing sets Four bearings in tandem 4 BA; BB
R Hubs Mechanical brake
R Antifriction lining of unhardened stainless steel in outer ring 4 BL
R Integral external flange on outer ring BT1
R One snap ring inside OR in cageless CARB bearing 2 BSC
R Series NAST and RNAST Crowned outer diameter 2 BNT
R 3612(00) Outer diameter crowning radius = 400 mm 2 BBY
R Adapter right hand threads 2 BAC
R Balls Wet preservation when dry preservation is normal 4
R Rivets Material: Stainless steel 4
R Hydrostatic shoe bearing HSBM and HSBS, concave
R Y-bearing unit Rubber insert in unit with steel sheet housing
R Sleeves, nuts and Made of stainless steel
locking devices
R Ball and roller screw assemblies, right hand threads
R Hyatt, prefix F BSA
R New Departure, prefix G BB1
R01 Acceptance samples for Renault (Repl. by Normal) X 4 Any
R011 Taper roller bearings for Renault (Repl. by Normal) X 4 BT
R02 Subcontractor involved in manufacture of products to be sold as SKF products 4 Any
R03 Rework of SKF products within SKF factories for sale as SKF products 4 Any
R04 Bearings for Matra competition cars (Repl. by Normal) X 4 Any
R05 Housings
R1 Inner ring of unhardened stainless steel 4 BL
R10 Rolling bearings, special chamfers on inner and/ or outer rings. (Partly replaced by VB…) X 2 Any
R102 Nuts Nuts, untreaded X
R103 Nuts Nuts, miscellaneous specifications regarding surface and slots
R103A Nuts Nuts, miscellaneous specifications regarding surface and slots
R104 Nuts Nuts with left hand thread X
R105 Nuts Nuts miscellaneous specifications regarding surface and slots
R10A Rolling bearings, special chamfers on inner and/ or outer rings. (Partly replaced by VB…) X 2 Any
R11 Rolling bearings, special chamfers on inner and/ or outer ring. (partly replaced by VB…) X 2 Any
R11A Rolling bearings, special chamfers on inner and/ or outer ring. (partly replaced by VB…) X 2 Any
R12 Rolling bearings, lubricationg hole(s) in inner ring 2 Any

R13 Y-bearings with cylindrical OD X 2 BBY

R133 Rolling bearings with D>315 mm X 4 BS2
R14 Spherical roller bearings for vibrating screens. (Replaced by A15) X 4 BS2

25
R141 Spherical roller bearings, C design for stationary electric motors X 4 BS2
R15 Rolling bearings with outside diameter 1 mm greater than normal X 2 Any
R161 Y-bearings, use of lubrication hole on side opposite locking device for location purposes X 4 BBY
in housing. (Replaced by VE022)
R162 As R161 but hole on same side as locking device X 4 BBY
R17 Thrust ball bearings, housing washer bore, older dimensions (Repl. by DP) X 2 BE1
R171 Thrust ball bearings, single direction, with two housing washers, R17 (Repl. by DHP) X 2 BE1
R172 Thrust ball bearings, single direction, with two shaft washers (Repl. by DS) X 2 BE1
R181 Cylindrical roller bearings for Finland, outer ring raceway form 1 BC1
R19 Taper roller bearings, straight flange (Repl. by Normal) X 1 BT
R195 Taper roller bearings with seals (Repl. by Drawing Numbers) X 2 BT1
R196 Rolling bearings with special groove in OD, delivered with O-ring 2 Any
R197 As R196 but delivered without O-ring X 2 Any
R198 N-type snap ring groove, tolerance, for groove position with side face opposite normal as 4 Any
reference face
R2 Outer ring of unhardened stainless steel 4 BL
R20 Spherical roller bearings with tapered bore, inspection of large end of bore 4 BS2
R200 R11 + R931 (Replaced by VB014/VB015) X 2 Any
R205 Rolling bearings with bore tolerance G5 X 4 Any
R21 Nuts KM nuts, thread tolerance H9
R215 Plummer blocks Plummer block housings, tolerance H7 (Repl. by Normal) X
R23 Adapter sleeves Adapter sleeves, calibrated expansion X
R24 Spherical roller bearings for vibrating screens (Repl. by A15) X 4 BS2
R241 Deep groove ball bearings fitted with Z1, RS1, 2Z1, 2RS1, RS1Z1, OD tolerance (Repl. by Normal) X 2, 4 BB1
R243 Bearings 61904-2Z for Olivetti X 4 BB1
R248 Balls Balls, waviness X
R249 Balls Balls, waviness X
R25 Balls Balls, waviness X
R250 Balls Balls, waviness X
R251 Balls Balls, waviness X
R252 Balls Balls, waviness X
R253 Balls Balls, waviness X
R254 Balls Balls, waviness X
R258 Balls Balls, waviness X
R26 Rolling bearing rings, width tolerances half the normal values. (Replaced by VQ112) X 4 Any
R260 Rolling bearing rings, special tolerances 4 Any
R261 Rolling bearings with inner ring radial runout to P6 X 4 Any
R262 Single row deep groove ball bearings and single row angular contact ball bearings, limited X 4 BA1; BB1
vibration or noise levels for naval (submarine) applications. (Replaced by VQ086)
R263 Taper roller bearings, series 302, 322, 322B, 303, 313, 323, 323B, total width, T, X 4 BT1
tolerance to standard NFE 22-335
R264 Bearing 22314 C, outer ring width tolerance X 4 BS2
R27 Bearings 6212, 6213 for Ford X 4 BB1
R271 Taper roller bearings for pinions and similar applications 4 BT1
R272 Taper roller bearings for pinions and similar applications 4 BT1
R273 Taper roller bearings for pinions and similar applications 4 BT1
R275 Taper roller bearings, metric series, total width, T, tolerance X 4 BT1
R279 Bearings 6303, special tolerance X 4 BB1
R28 Bearings 608, 6203, 6303, 6308, tolerances X 4 BB1
R29 Bearings, series 63, tolerance (Repl. by Normal) X 4 BB1
R3 Inner and outer ring of unhardened stainless steel 4 BL
R31 Bearings 22228 CKJ for centreless grinding machines. P6 plus axial clearance 30 to 50µm X 4 BS2
R32 Deep groove ball bearings, axial clearance X 4 BB1
R4 Antifriction lining of unhardened stainless steel on inner ring 1 BL
R40 Packaging for transport by sea X 4 Any
R401 625-2Z, lubrication X 4 BB1
R41 200, 300 series bearings X BBF
R44 Bearings to be mounted using Loctite or similar adhesive materials, preservatives and 4 Any
inspection of pregreased bearings
R49 Y-bearings and Y-bearing housings relubrication facilities X 2 BBY
R502 Spherical roller bearings, C1, max. wall thickness of inner ring, mean OD of outer ring X 4 BS2
marked on package
R503 Paired NU 328 M/C4 bearings for tests on locomotive X 4 BC
R505 Rolling bearings Equal to VA3552 except VX106 2, 4 Any
R603 Bearings 22312 M/C6 for grease testing machine R 2 F (Repl. by A209) X 4 BS2
R611 Y-bearings, phosphated, special tolerances X 4 BBY
R611A Y-bearings, phosphated, special tolerances X 4 BBY
R62 Sleeves Sleeves, electrolytic zinc plating
R621 Nuts Nuts, electrolytic zinc plating
R63 Cadmium or zinc plating of inner ring, special tolerances. (Replaced by Normal) X 4 BBY
R803 Taper roller bearings, inch sizes, both ring of case hardening steel X 4 BT1
R83 Rolling bearings, bainitic hardening of inner rings X 4 Any
R86 Bearings 2310/C5 for grease testing machine R 2 F X 4 BJ2
R87 Rolling bearings, inner rings of vacuum remelted steel X 4 Any
R871 Rolling bearings, inner and outer rings and rolling elements of vacuum remelted steel X 4 Any
R88 Rolling bearings, all components of non-conventional materia (Virium) 4 Any
R881 Rolling bearings, all components of non-convential material (Cénium) 4 Any
R891 Sleeves Sleeves (and/ or nuts, and/or washers) of stainless steel X
R892 Rolling bearings of stainless steel X 4 Any
R90 Rolling bearings, quality lower than normal X 4 Any
R901 Ball bearings, quality lower than normal X 4 BA; BB
R902 Taper roller bearing cages, phosphated, bars not deformed X 3 BT1
R90A Rolling bearings, quality lower than normal X 4 Any
R91 Cylindrical roller bearings for traction motors X 4 BC1
R910 Spherical roller bearings for high speed tests X 4 BS2
R911 Taper roller bearings for underground railway (RATP), blending of corners and special X 4 BT
inspection (Repl. by Normal)
R912 Cylindrical roller bearings, silent running X 4 BC
R913 Y-bearings, improved (= R98) 2 BBY
R92 Rolling bearings Bearings for SNECMA jet engines X 4 Any
R93 Taper roller bearings, cone with straight flanges, dimpled rollers (Repl. by Normal) X 4 BT
R931 Taper roller bearings for pinions and similar applications. (Replaced by VQ006) X 4 BT
R932 Taper roller bearings for pinions and similar applications X 4 BT
R933 Taper roller bearings for pinions and similar applications X 4 BT
R934 Taper roller bearings for pinions and similar applications. (Replaced by CL7A) X 4 BT
R935 Taper roller bearings for pinions and similar applications. (Replaced by R934) X 4 BT
R936 Taper roller bearings for automotive suspension, steering gear and other similar applications X 4 BT
(low quality)

26
R94 Ball bearings for certain simple applications or where a quality lower than normal is permitted X 4 BB
R940 Bearings 6200-Z1 for electric motors (Repl. by Normal) X 4 BB1
R941 Single row deep groove ball bearings for electric motors (Repl. by Q66) X 4 BB1
R943 Single row deep groove ball bearings for electric motors (Repl. by C3Q66) X 4 BB1
R946 Single row deep groove ball bearings for electric motors, d => 10 mm. (Replaced by EP1) X 4 BB1
R946A Single row deep groove ball bearings for electric motors, d => 10 mm. (Replaced by EP1) X 4 BB1
R95 Ball bearings for clutch release application X 4 BB1
R96 Rings Loose rings supplied to other SKF companies X 4 Any
R961 Cage and rolling element assemblies sold to other SKF companies X 4 Any
R962 Packaging specification for component parts and complete bearings delivered to overseas 4 Any
SKF companies (tropical packages)
R96A Rings Loose rings supplied to other SKF companies X 4 Any
R98 Y-bearings, improved (= R913) 2 BBY
R99 Plummer blocks Plummer blocks, seals X
R991 Plummer blocks Plummer blocks, seals X
R992 Plummer blocks Plummer blocks, seals X
R993 Plummer blocks Plummer blocks, lubrication features
R994 Plummer blocks Plummer blocks, lubrication features
R995 Plummer blocks Plummer blocks, lubrication features
R996 Plummer blocks Plummer blocks, lubrication features
R999 X
RC Outer rings Shoulder diameter ground for cage centering 1 Any
Rental 4 Any
RJ Balls and rollers. Material Niro 18/8, unhardenable stainless steel 4
RJ Z-sealings of stainless unhardenable steel
RJ2 Balls and rollers. Material Niro 18/8-2, unhardenable stainless steel 4
RM Y-bearing unit Bearings from Series YAT 2
RP Sleeves and nuts (R + P) Made of stainless sinter steel material
RR INA series Cinc-iron plated bearings BN
RS Balls and rollers Material Niro 40/15, hardenable stainless steel 4
RS Z-sealings of stainless hardenable steel
RS Contact seal at one side of the bearing. The seal is of steel sheet and rubberised cloth 2 BB; BA2; BJ2; BL
RS1 Contact seal at one side of the bearing. The seal consists of a reinforcement plate with 2 BA2; BB; BJ2
rubber (generally black) moulded to it. It withstands continous operation at temperatures from -20º to
+120º C.
RS1 Balls and rollers Material: Niro 90/17, hardenable stainless steel 4
RS14 Seals Contact seal at one side of the bearing. The seal consists of a reinforcement zinc coated steel 2 BA2
insert with rubber moulded to it. It withstands continous operation at temperatures from -20º to +120º
RS1N C.
(RS1 + N) Contact seal at one side of the bearing.and a snap ring groove at the other side 2 BB
of the outer ring
RS1NB (RS1 + NB) Contact seal and a snap ring groove at the same side of bearing 2 BB
RS1NBR (RS1 + NBR) Contact seal and a snap ring groove including snap ring at the same side of bearing 2 BB
RS1NR (RS1 + NR) Contact seal at one side of the bearing.and a snap ring groove including 2 BB
the snap ring at the other side.
RS1PL Seals Modified reinforcement plate location (only for seal designation) 4
RS1RL Seals Modified anchorage design (only for seal designation) 4
RS1RZ (RS1+ RZ): Contact seal (RS1) at one side and low friction contact seal (RZ) at the other side of the 2 BB1
RS1Z bearing
(RS1 + Z) Contact seal at one side of the bearing.and a shield at the other side. 2 BB
RS2 Balls and rollers Material: Niro 90/15, hardenable stainless steel 4
RS2 Contact seal at one side of the bearing. The seal is usually red and consists of a 2 BA2; BB;
reinforcement plate with rubber moulded to it. It will withstand continous operation at temperatures BJ2; BL
up to + 175º C
RS24 Contact seal at one side of the bearing. Zink coated reinforcement plate with rubber moulded to it. It 2 BA2
will withstand continous operation at temperatures up to + 175º C
RS2N (RS2 + N) Seal at opposite side to snap ring groove 2 BA2; BB;
BJ2; BL
RS2NB (RS2 + N) Seal at same side as snap ring groove 2 BA2; BB;
BJ2; BL
RS2NBR (RS2 + NR) Seal at same side as snap ring groove 2 BA2; BB;
BJ2; BL
RS2NR (RS2 + NR) Seal at opposite side to snap ring groove 2 BA2; BB;
BJ2; BL
RS2Z (RS2 + Z) Contact seal at one side of the bearing.and a shield at the other side. 2 BB1
RS2ZN (RS2 + Z + N) RS2 seal at opposite side to snap ring groove 2 BB1
RS2ZNB (RS2 + Z + N) RS2 seal at same side as snap ring groove 2 BB1
RS2ZNBR (RS2 + Z + NR) RS2 seal at same side as snap ring groove 2 BB1
RS2ZNR (RS2 + Z + NR) RS2 seal at opposite side to snap ring groove 2 BB1
RS3 Balls and rollers Material: AISI 440 C (AFNOR z100CD17) for ADR W-bearings 4
RSH Axial contacting double lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (NBR) moulded to it. Inner ring with recess.
RSH2 Axial contacting double lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (FKM) moulded to it. Inner ring with recess.
RSH3 Axial contacting double lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (ACM) moulded to it. Inner ring with recess.
RSH5 Axial contacting double lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (HNBR) moulded to it. Inner ring with recess.
RSHRSL Axial contacting double lip seal at one side of the bearing and axial contacting single lip seal 2 BB1
at the other.
RSL Axial contacting single lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (NBR) moulded to it. Inner ring with recess.
RSL2 Axial contacting single lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (FKM) moulded to it. Inner ring with recess.
RSL3 Axial contacting single lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (ACM) moulded to it. Inner ring with recess.
RSL5 Axial contacting single lip seal at one side of the bearing. The seal consists of a 2 BB1
reinforcement plate with rubber (HNBR) moulded to it. Inner ring with recess.
RSN Contact seal at one side of the bearing. The seal is of steel sheet and rubberised cloth and 2 BA2; BB
a snap ring groove at the other side of the outer ring
RSNB Contact seal and snap ring groove at the same side 2 BB
RSNBR RSNB with snap ring. Contact seal and snap ring groove and snap ring at the same side 2 BB
RSNR RSN with snap ring. Contact seal at one side of the bearing and snap ring groove including 2 BB
snap ring at the opposite side
RSZ RS seal at one side and Z-shield at the other 2 BB
RSZN Contact seal at one side and a shield at the other and a snap ring groove in outer ring 2 BB
RSZNB Contact seal and snap ring groove at the same side and a shield at the other side 2 BB
RSZNBR Contact seal and snap ring groove with snap ring at the same side and a shield at the other side 2 BB
RSZNR Contact seal at one side and a shield at the other and a snap ring groove in outer ring with 2 BB
snap ring
Rxx Repair/rework (IPS 992x) Any
R-xx Y-bearing unit Bore diameter with rubber insert in housing

27
Rxxx Machine spindle units R is follwed by two or three digits stating max. spindle revolutions per minute divided by 1000
RZ Low friction contact seal at one side of the bearing 2 BB1
RZ Hyatt, prefix F BSA
RZN (RZ + N): Low friction contact seal (RZ) at opposite side to snap ring groove (N) 2 BS1
RZNB (RZ + N): Low friction contact seal (RZ) at same side as snap ring groove (N) 2 BB1
RZNBR (RZ + NR): Low friction contact seal (RZ) at same side as snap ring (NR) 2 BB1
RZNR (RZ + NR): Low friction contact seal (RZ) at opposite side to snap ring (NR) 2 BB1
S Cylindrical rollers Roller shape: Sphered ends 4
S Hubs High-speed traffic
S Lubrication holes in both rings/washers 2 BL
S Continuous casting Units equipped with sensor(s) for monitoring load, speed, temperature, etc.
roller units
S Machine spindle units Bearing arrangements: Special. Three angular contact ball bearings and one cylindrical
roller bearing, for MSUA two angular contact ball bearings
S Y-Pop Bearing, without washer (Light version) and shortened sleeve 2 BBY
S Y-bearing units Bearings from Series 4792(00). Wide series, cylindrical locking ring, RS-seals, lubrication hole
S TR-S, TR-SQ Deep groove ball- and Y-bearings of RKS origin. Sphered outside diameter 1 BBY
S Thrust roller bearings Split sheet metal casing 2 BF
Prefix K
S Hydrostatic shoe bearing HSBJ, single guidance
S Nuts Made of steel, when not standard
S Ball and roller screw assemblies, screw shaft end machined to the root diameter and
annealed at one or both ends
S Hyatt, prefix F BSA
S INA series Adjustable radial internal clearance by virtue of special outer ring design (series NA 49 S) BN
S0 Inner and outer rings stabilised for a max. working temperature of 150º C 4 Any
S00 Inner and outer rings stabilised for a max. working temperature of 120º C 4 Any
S0B Only inner ring stabilised for a max. working temperature of 150º C 4 Any
S1 Inner and outer rings stabilised for a max. working temperature of 200º C 4 Any
S2 Inner and outer rings stabilised for a max. working temperature of 250º C 4 Any
S3 Inner and outer rings stabilised for a max. working temperature of 300º C 4 Any
S3A Only outer ring stabilised for a max. working temperature of 300º C 4 Any
S3B Only inner ring stabilised for a max. working temperature of 300º C 4 Any
S4 Inner and outer rings stabilised for a max. working temperature of 350º C 4 Any
SA Lubrication holes in outer ring / housing washer 2 BL
SB Lubrication holes in inner ring / shaft washer 2 BL
SB Balls and rollers Black oxidized 4
SC Balls and rollers Chromium plated 4
SC NICE Series Contact seal at one side of the bearing 2 BB1
SD Y-bearing units Bearings from Series 4792(00) D. (S plus D) Plus tolerance for metric bore diameter
SD Balls and rollers Metal mixed amorphous carbon (Me-C:H) coated (NoWear) Bearing suffix L5DA 4
SL NICE Series Bearing with seal on one side 2 BB1
SM Balls and rollers Coating: Molybdenum disulphide (MoS2) coated. Bearing suffix L5MM 4
SM01 INA series Bearing filled with grease to DIN 51 825, NLGI 2, for -30 to + 120°C BN
SM02 INA series Bearing filled with grease to DIN 51 825, NLGI 3, for -30 to +140°C BN
SM11 INA series Low temperature grease to DIN 51 825, NLGI 2, for -55 to +100°C BN
SM25 INA series High temperature grease to DIN 51 825, NLGI 2, for -25 to +150°C BN
SN Housings Shock pulse nipple connection ???? Condition Monitoring (SNL M8, SAF 1/4" connection)
SNA Housings Housings prepared for Condition Monitoring (SNL M6, SAF ?? connection)
SNB Housings Housings prepared for Condition Monitoring mounted parallel to the base
SNC Housings Housings delivered with Copperhead sensor CPHD
SND Housings Two locations of SN
SNM Housings Housings prepared for Condition monitoring mounted in the middle of the top
SNP Housings Housings delivered with Dumb stud
SNS Housings Housings tolerance
Diameter delivered with Smart rollers
for needle stud in needle roller and cage assemblies (e.g. K
130x137x24/SORT-1-3, needle roller and cage assembly with needle rollers having diameter
SORT… INA series tolerance -1 to -3 μm) BN
SP Rolling bearings Special precision, with dimensional accuracy similar to P5 and running accuracy similar to P4 4 Any
SP Cylindrical rollers Tolerance class for rollers assembled in bearings made to SP tolerance 4
SR Needle rollers Roller shape: flat ground end 4
Bremen Inch Series
SS NICE Series Shield at one side of the bearing 2 BB1
SS Old designation for lubrication holes in both rings 2 BL
SV Balls and rollers Surface vibro finishing with grinding compound and chemical additives (accelerator) 4
SV1 Balls and rollers Surface vibro finishing standard (only with grinding compound) 4
SZ Shifting shield (axial movement), outer ring anchored, on one side of the bearing 2 BSC
SZ Hyatt, prefix F BSA
SZ Plummer blocks For sensor, two hole in side plane and one recess in bottom plane
SZB Shifting shield (axial movement), inner ring anchored, on one side of the bearing 2 BSC
SZD Plummer blocks for sensor, one hole in side plane
SZE Plummer blocks For sensor, one hole in side plane and one recess in bottom plane
T Castors and forks Special seal
T Machined cage of fabric-reinforced phenolic-type plastic, usually centered on the rolling elements 3 BA1
T Balls Additional suffix for dry preservation 4
T Needle rollers Roller shape: tapered ends 4
T Rivets Head shape: counter sunk, low 4
T RKS. Slewing rings Material: steel 42 CD 4 heat treated to R = 890 to 970 N/mm^2 (chromium and 4 BV
molybdenum alloyed steel)
T Antifriction lining of PTFE glass fabric in outer ring 1 BL
T Inch size Tapered bore, nominal diameter at large end of taper 2 BT
T Y-bearing units Bearings from Series 6303(00) B
T Nuts Trapezoidal thread
T Plummer blocks Housings from SAF, SAFD and SDAF Series with TER, Taconite seal
T... Matched bearing sets Tapered roller bearings. Total width. T followed by the set total width in mm uncoded. 4 BT
Forms part of designation only when not normal
T200 Traction motor, transmission and axlebox bearings for rolling stock. (Replaced by VA350) X 4 Any
T202 Bearings except deep groove ball bearings, special noise test X 4 Any
T205 Balls Commercial balls
T206 Balls Bicycle balls
T207 Rollers Commercial rollers
T208 Balls Balls with special tolerance for 70 C, 72 C, 70 AC, and 72 AC bearings X
T209 Tapered roller bearings for automotive differentials X 4 BT1
T210 Tapered roller bearings for automotive pinions X 4 BT1
T211 Rollers Needle rollers for universal joints
T212 Rollers Needle rollers for universal joints
T213 Case hardened tapered roller bearing cones, single row, for US market X 4 BT1
T214 Single row cylindrical roller bearings with increased axial load carrying capacity X 1 BC1

28
T34 etc. Threaded adapter 4 BAC
T4 Antifriciton lining of PTFE glass fabric on inner ring 1 BL
T701 Rolling bearings Kiln truck bearings (Repl. by VA201) X 4 Any
T902 Bearings with black seals (2RS11), tested at 0,15 - 0,20 bar (Repl. by 2RS1) X 2 BB1
T903 Rolling bearings Bearings for racing cars X 4
T904 Rolling bearings Bearings for racing cars X 4
T990 Low quality bearings X 4 Any
T999 Bearings with quality for special purposes X 4 Any
TA Rolling bearings Machined cage of fabric-reinforced phenolic-type plastic, centered in the outer ring 3 BB1; BJ2
TA Rivets Head shape: counter sunk, high 4
TA Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-A V-ring seals
TA Plummer blocks Housings from SAF, SAFD and SDAF Series with TER-A Taconite seal button head lube
TA Y-bearing units Bearings from Series 6303(00) A
TAE Cages Machined cage of reinforced PEEK material, centered on the outer ring 3 BA1; BA2; BAQ;
BB1; BBF
TAH Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-AH V-ring made of viton
TAM Hyatt, prefix F BC1
TB Rolling bearings Machined cage of fabric-reinforced phenolic-type plastic, centered on the inner ring 3
TB Y-bearing units Bearings from Series 6303(00) BA
TB Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-B Light alloy flinger
TB Plummer blocks Housings from SAF, SAFD and SDAF Series with TER-B Taconite seal giant button head lube
TB1 Cages Modified TB-design 3 BB1
TBE Cages Machined cage of reinforced PEEK material, centered on the inner ring 3 BA1; BA2; BB1;
BBF
TBT Matched bearing sets Three bearings in the set, back to back plus tandem 4 BA; BB
TBX Cages Modified TB-design 3 BB1
TC Rolling bearings Machined cage of fabric-reinforced phenolic-type plastic, centered on the inner ring. 3
Old Philadelphia designation
TC Y-bearing units Bearings from Series 6303(00) B2LS1F
TC Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-C Felt seal
TC Plummer blocks Housings from SAF, SAFD and SDAF Series with TER-C Taconite seal Canada
TCB Plummer blocks Felt seal 'FSB' designation TSN-CB
TCV Plummer blocks Housings from SAF, SAFD and SDAF Series with TER-CV Taconite seal Canada with V-ring
TD Y-bearing units Bearings from Series 6303(00) BA2LS1F
TD Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-D Canada D
TE Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-E Canada E
TE Cages Machined cage of reinforced PEEK material, centered on the rolling elements 3 BA1; BA2; BAQ;
BB1; BBF
TF Y-bearing units Bearing from Series YAR 2-2F
TFT Matched bearing sets Three bearings in the set, face to face plus tandem 4 BA; BB
TG Matched bearing sets Three bearings in the set, universal 4 BA
TG Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-G Double lip seal of polyurethan
TG Y-bearing units Bearings from Series YAJ 2-2F (Replaced by YAR 2-2F(TF) X
TGT Matched bearing sets Three bearings in the set, universal. Loading case: Thrust only 4 BA
TH Machined cage of fabric-reinforced phenolic type plastic, with snaptype pockets 3 BB1
TH Y-bearing units Bearings from Series YAR 2-2RF/HV
TH Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-H Labyrinth seal incl. Garter seal
THE Cages Machined cage of reinforced PEEK material, with snap type pockets 3 BA2; BAQ; BB1;
BBF
THR Y-bearing units Bearings from Series YAR 2-2RFGR/HV
TJ Y-bearing units Bearings from Series YAJ 2 (Replaced by YAR 2 (TM ) X
TJ Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-J Inpro seal
TJA Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-JA Inpro seal split
TJP Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-JP Inpro seal plastic
TK Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSNT-K
TL Y-bearing units Bearings from Series YAR 2-2FF
TL Adapter sleeves With key slots adapted to L (for CARB)
TLC Plummer blocks Housings from SAF, SAFD and SDAF Series with LORC seal TL with contact seal
TLF Plummer blocks Housings from SAF, SAFD and SDAF Series with LORC seal TL with steel
TLP Plummer blocks Housings from SAF, SAFD and SDAF Series with LORC seal TL with seal in PTFE
TM Hyatt, prefix F BC1
TM Y-bearing units Bearings from Series YAR 2
TN Rolling bearings Injection moulded plastic cage 3
TN NICE Series Injection moulded plastic cage 3 BB1
TN1 Cages Injection moulded plastic cage 3 BC2
TN1H Cages Injection moulded plastic cage 3 BC2
TN8 Injection moulded plastic cage 3 BC; BG
TN9 Rolling bearings Injection moulded reinforced plastic cage. Material PA66 3
TN91 Modified TN9 cage 3 BB1
TN91 Cages Modified TN9 cage (smaller widht) 3 BDA
TN91 As TN9 but straight pockets compare with drilled cages 3 BJ2
TN9W Cages TN9 with increased bottom width 3 BB1
TND Plummer blocks Housings other than SAF, SAFD and SDAF Series with Taconite seal TSN-D. Australia TST
TNF Plummer blocks Housings other than SAF, SAFD and SDAF Series with Taconite seal TNF. Sweden
TNH TN9 made of 'high temp' material PEEK. Glass Fibre reinforced 15% (rolling elements centered) 3 BA; BB; BC
TNH1 TN9 made of 'high temp' material (not peek) ST-HTP 3 BA; BB; BC
TNH5 TN9 made of 'high temp' material PEEK. Carbon fibre 30% reinforced (rolling elements centered) BB;BA
TNH5A TN9 made of 'high temp' material PEEK. Carbon fibre 30% reinforced (centered in the outer ring) BB;BA
TNL Injection moulded plastic cage, in form of band (strip) 3 BA; BB; BC
TNN INA series Cage of plastic (polyamide), glass fibre reinforced, N profile
TP Injection moulded cage of PA46 material 3 BSC
TP Y-bearing units Bearings from Series YAJ 2-2FF (Replaced by YAR 2-2FF (TL) X
TP Injection moulded cage (material PA46 and 25% glass-fibre reinforced) 3 BSC
TQ Y-bearing units Bearings from Series YAJ 2-2RF (Replaced by YAR 2-2RF (TR) X
TR Matched bearing sets Three bearings in the set. Loading case: radial only 4 BB; BC
TR Y-bearing units Bearings from Series YAR 2-2RF
TR Plummer blocks Housings other than SAF, SAFD and SDAF Series with Garter spring seal TSNT-R
TS Rolling bearings Machined cage of fabric-reinforced phenolic-type plastic, centered in the outer ring. 3
Old Philadelphia designation
TS Hyatt, prefix F BC1
TS Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-S labyrinth seals
TS1 Seal at one side of the bearing. Lip made of Desmopan and insert of Durethan material 2 BB1
TT Matched bearing sets Three bearings in the set. Tandem 4 BA; BB
TU Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-U labyrinth seal for oil lubr., steel
TUL Plummer blocks Housings other than SAF, SAFD and SDAF Series with TSN-UL labyrinth seal for oil lubr. with Al. parts
TV Plummer blocks Housings from SAF, SAFD and SDAF Series with Taconite seal TER-V with V-ring

29
 TW Plummer blocks Housings other than SAF, SAFD and SDAF Series with split Garter seal (Walker seal) TSNT-W
TVA Plummer blocks Housings from SAF, SAFD and SDAF Series with Taconite seal TV + TA. TER-VA
TVB Plummer blocks Housings from SAF, SAFD and SDAF Series with Taconite seal TV + TB. TER-VB
TX Antifriction lining of (Teflon) PTFE polyester fabric in outer ring 1 BL
U Adapter sleeves Without nut and locking device X
U Bearing without inner ring 2 BVH
U Series 115 and 116 Without sleeve 2 BJ2
U Lubricants for rolling Grease filling, 100% of the unswept volume X 4 Any
U bearings
Y-Pop Bearing without sleeve, locking ring and washer 2 BBY
U Without locking screws (Series YAR, YAT etc.) 2 BBY
U Without locking ring (series YEL, YET etc.) 2 BBY
U Y-bearing locking rings Without set screw(s)
U No adapter 4 BAC
U Without antifriction lining/inserts 1 BL
U Antifriction lining of Teflon treated cotton cloth in outer ring 1 BL
U Y-bearing units Built bearing without locking ring
U2, U4 Taper roller bearings. Close total width tolerance for metric single row taper roller bearings. The letter U is followed 4 BT1
Metric series. U-classes by symbols indicating the position and magnitude of the tolerance range. Example: 32008 X/U4
U4 Antifriction lining of Teflon treated cotton cloth on inner ring 1 BL
UB1, Housing units Combinations of housing/box bodies including bearing(s)
UB2,
UM1, Housing units Combinations of housing/box bodies excluding bearing(s)
UM2,
UP Rolling bearings Ultra precision, with dimensional accuracy similar to P4 and running accuracy greater than P4 4 Any
UP Cylindrical rollers Tolerance class for rollers assembled in bearings made to UP tolerance 4
UP1, Housing units Combinations of parts other than housing/box bodies
UP2,
UPG Single row deep groove ball bearings of accuracy class UP with both side faces ground so 4 BB1
that any two bearings with this feature can be mounted as a pair, back to back, face to face or in
tandem. Bearings mounted back to back or face to face have a light preload
V Rolling bearings No cage, full number of rolling elements 1 Any
V NICE Series Bearing without cage 3 BB1
V Bevel gears Gear wheel, right hand
V Needle rollers Roller shape: trunnion ends 4
V Seals Vent holes in the seal 4
V Swaging groove each side of the outer ring 2 BL
X VE552D Spherical roller bearings Without the relubrication feature, W33 4 BS2
X VE553D Spherical roller bearings Without the relubrication feature, W33 4 BS2
X VE554D Spherical roller bearings Without the relubrication feature, W33 4 BS2
X VE564D Spherical roller bearings Without the relubrication feature, W33 4 BS2
V Y-bearing units Steel sheet housing part (only in housing designation)
W Balls Additional suffix for wet preservation 4
W Cylindrical roller 'Walze', specific tolerances 4
W Thrust roller bearings Lubricating holes in the sheet metal casing 2 BF
Prefix K
W Inch size Groove for locking device, e.g.. key way 2 BT
W Metric Series Run in' bearing. This variation is mainly reserved for tapered roller bearings. The suffix is not 4 BT1
used for bearings wich are normally treated in this way
W Outer ring without lubrication hole(s) Designation shown in housing, bearing and unit designation 2 BBY
W Reversed contact angle, 'face to face'. Double row angular contact ball bearings 1 BA2
W Y-bearing units Bearings from Series 4462(00)
W 52, 53, 54 (See AW, EW) BA2
X W Without W33 lubrication feature, (when W33 standard) 2 BS2;BJ2
W10 Bearing with Dulited surfaces X 4 Any
W108 Non-standard shield clearance of .008 to .009 inch X 4 BB1
W11 Bearing with Parco-Lubrized surfaces 4 Any
W115 W5 + W11. Replaced by VR-Nos X 4 Any
W12 Raceway and rolling elements Dulited. All other surfaces Parco-Lubrized 4 Any
W125 W5 + W12. Replaced by VR-Nos X 4 Any
W13 Bearing with Parco-Lubrized bore and outer diameter 4 Any
W14 Dulited rings, rolling elements, Parco-Lubrized bore outer diameter X 4 Any
W15 All surfaces Dulited, except lands supporting cage ride 4 Any
W16 Parco-Lubrized inner ring and outer diameter of outer ring 4 Any
W17 Dulited capped bearing, except shield or seal tin-coated X 4 BB1
W18 Bearing with specific Dulited surface or surfaces X 4 Any
W19 Bearings with special radial internal clearance limits X 4 Any
W2 Bearing meeting special torque requirements X 4 Any
W20 3 Oil holes in outer ring of spherical roller bearing 2 BS2
W20X 6 Oil holes in outer ring of spherical roller bearing 2 BS2
W21 Flush ground bearing with inner and outer rings of equal width. Close cross corner tolerances 4 Any
W215 W5 + W21 X 4 Any
W216 W6 + W21 4 Any
W22 Special reduced outer diameter tolerance for outer ring. Standard tolerance for inner ring 4 Any
W23 Rolling bearings Special features for traction motor bearings 4
W24 Special tolerance for seal or shield location on capped bearings X 4 BB1
W25 Spherical roller bearing with close outer ring width tolerance X 4 BS2
W26 Spherical roller bearing with 6 oil holes drilled through the inner ring 2 BS2
W27 SY pillow block bearings with a special collar X 2 BBY
W28 Single bearings packaged in pairs X 4 Any
W29 Cylindrical roller bearings, special radial internal clearance interchangeability X 4 BC
W3 Bearing marked to show measured accuracy X 4 Any
W30 Bearings with specified parts tinplated 4 Any
W31 Spherical roller bearings inspected to certain quality control requirement X 4 BS2
W32 Plates, seals inspected to special minimum looseness X 4 BB1
W33 Rolling bearings with 3 oil holes and cirumferential groove in outer diameter 2 BC; BJ2;BS2
W33X Spherical roller bearings with 6 oil holes and cirumferential groove in outer diameter 2 BS2
W34 Cage has been 100% fluorescent penetrant inspected 3 Any
W35 Single row deep groove ball bearing with reduced side runout inner ring X 4 BB1
W36 Bearings that have been quality audited for bore and outer diameter X 4 BB1
W37 Rolling bearings Special aircraft bearing identification X 4 Any
W38 Rolling bearings Wright aero. Quality assurance X 4 Any
W39 Rolling bearings Allison quality assurance X 4 Any
W4 Hi-point of eccentricity marked on inner ring or sleeve 4 Any
W40 Rolling bearings Bearing with silver plated cage X 3 Any
W405 Rolling bearings W5 + W40 X 3, 4 Any
W41 Rolling bearings Bearing with silver and lead plated cage 3 Any
W42 Rolling bearings Bearing with silver and leadindium plated cage 3 Any
W43 Rolling bearings Bearings with chrome plated cage 3 Any

30
W45 Locknuts and washers Cadmium plated locknuts and washers X
W5 Customers part number marked on bearing X 4 Any
W50 Rolling bearings Bearings with double stabilized heat treated inner rings X 4 Any
W501 W19 +W36 X 4 BB1
W502 W22 + W33 2, 4 BC; BJ2; BS2
W503 W4 + W33 2, 4 BC; BJ2; BS2
W504 W33 + W55 X 2 BS2
W505 W33 + W51 2, 4 BC; BJ2; BS2
W506 W31 + W33 2, 4 BS2
W507 W4 + W31 and W33 2, 4 BS2
W508 W4 + W31 X 4 BS2
W509 W26 + W31 and W33 2, 4 BS2
W51 Special noise test and carton marking X 4 Any
W510 W33 + W 56 X 2 BS2
W512 W22 + W31 and W33 X 2, 4 BS2
W513 W26 + W33 2 BS2
W513X W26 + W33X 2 BS2
W514 W26 + W31 X 2, 4 BS2
W515 W4 + W58 X 4 Any
W516 W10 + W33 X 2, 4 BC; BJ2; BS2
W517 W33 + W61 X 2 BS2
W518 W20 + W26 X 2 BS2
W519 W20 + W81, used with special Nos. only X 2, 4 BS2
W52 Single cap bearings with marking on side opposite cap X 4 BB1
W521 W5 + W74 X 3, 4 BB1
W522 W33 + W81, used with special Nos. only X 2, 4 BC; BJ2; BS2
W523 W31 + W76 X 2, 4 BC; BJ2; BS2
W524 C02 + W507 X 2, 4 BS2
W525 W31 + W77 2, 4 BS2
W526 W506 + W515 X 2, 4 BS2
W527 W22 + W26 + W33 X 2, 4 BS2
W528 W33 + W78 X 2, 4 BS2
W529 W33 + W58 X 2, 4 BC; BJ2; BS2
W53 Ball bearings modified and flush ground on one face only X 1 BA; BB
W530 W33 + W64 X 2, 4 BC; BJ2; BS2
W531 W26 + W31 + W77 X 2, 4 BC; BJ2; BS2
W532 W4 + W28 + W58 X 4 Any
W533 W26 + W77 2
W534 C08 + W507 2, 4 BS2
W535 W31 + W58 + W77 2, 4 BS2
W536 W4 + W33 + W58 2, 4 BC; BJ2; BS2
W537 W33 + W76 X 2 BS2
W538 C20 + W4 + W28 + W58 X 4 Any
W539 C20 + W4 + W58 4 Any
W54 Special quiet running bearings X 4 BA; BC
W55 Bearings with locating holes in the outer ring 2 BS2
W56 Lifting holes in face of bearing ring X 2 BS2
W57 Ball bearings G.E. motor bearing quality assurance X 4 Any
W58 Outer ring marked to show high point X 4 Any
W59 Special FORD Motor Co. quality requirements X 4 Any
W6 Gear side marked on bearing X 4 Any
W60 Ball bearings Quality assurance U.S. Navy purchase of G.E. bearings X 4 Any
W61 Bearings with 3 tapped holes in the face of the outer ring 2 BS2
W62 Cylindrical roller bearing - side flanges with 15 to 30 minutes relief angle X 1 BC
W63 Marking for deviation from nominal outer diameter size X 4 Any
W64 Bearings lubricated with POLY-OIL, standard blue 4 Any
W64C Bearings lubricated with POLY-OIL (replaced B) 4 Any
W64E Bearings lubricated with POLY-OIL Medium load 4 Any
W64F Bearings lubricated with POLY-OIL Food compatible, white coloured 4 Any
W64G Bearings lubricated with POLY-OIL Food compatible Any
W64H Bearings lubricated with POLY-OIL Heavy load 4 Any
W64HX Bearings lubricated with POLY-OIL same as H but green coloured 4 Any
W64J Bearings lubricated with POLY-OIL Low friction. Oil free of silicon 4 Any
W64JW Bearings lubricated with POLY-OIL same as J but all tools and working areas washed, 4 Any
free from silicon
W64L Bearings lubricated with POLY-OIL Low temperature, white coloured 4 Any
W64P Bearings lubricated with POLY-OIL with additive of powder. 4 Any
W66 Blind hole in outer diameter of cylindrical roller bearing X 2 BC
W67 Cylindrical roller bearing with over size outer diameter for greater housing fit X 2 BC
W7 Bearing bore diameter indicated X 4 Any
W70 Cylindrical roller bearing with increased outer ring axial clearance X 4 BC
W71 Special marking for Sikorsky bearings purchased by U.S. Navy X 4 Any
W72 Cylindrical roller bearing with angled flange increased axial clearance X 4 BC
W73 Spherical roller bearing with one counter-bored hole in outer ring 2 BS2
W74 Ball bearing, J-type cage with controlled cage drop X 3 BB1
W75 Standard Conrad ball bearing with Republic rocked tube and Hofors balls X 4 BB1
W76 Four tapped holes in each face of outer ring 2 BS2
W77 Rolling bearings with W33 or W33X groove and holes / holes plugged 2 BC; BJ2;BS2
W78 Quiet running spherical roller bearings X 4 BS2
W79 W33 spherical roller bearing with one hole counter bored 2 BS2
W8 No lube-hole in outer ring of bearing used in SY pillow block X 2 Any
W80 Special bearings: inner ring, outer ring and rollers of airmelt carburized grade steel. X 4 Any
Replaced by HA4
W81 Special bearing: inner ring of air-melt carburized grade steel. Replaced by HA3 X 4 Any
W82 Special bearing: outer ring of air-melt carburized grade steel. Replaced by HA2 X 4 Any
W83 W81 plus W82, plus standard through hardened rollers. Replaced by HA1 X 4 Any
W86 Special bearing: inner ring and outer ring standard through hardened, rollers of carburized X 4 Any
grade steel. Replaced by HA5
W90 Same as W80, ex carburized grade steel consumable VAC-melted. Replaced by HEA4 X 4 Any
W91 Same as W81, ex carburized grade steel consumable VAC-melted. Replaced by HEA 3 X 4 Any
W92 Same as W82, ex carburized grade steel consumable VAC-melted. Replaced by HEA2 X 4 Any
W93 Same as W83, ex carburized grade steel consumable VAC-melted. Replaced by HEA1 X 4 Any
W96 Same as W86, ex carburized grade steel consumable VAC-melted. Replaced by HEA5 X 4 Any
WA HUB units Unit with sensor 2 BA2
WA Y-bearing units Bearings from Series 4462(00)-2LSF
WB HUB units Unit with sensor 2 BA2
WF Y-bearing units Bearings from Series YEL 2-2F

31
VGS Inner ring raceway is not finish ground. Finish grinding is done after mounting on the shaft. 1 BC; BN
Replaced by VU001
VGS INA series Inner ring raceway preground only (e.g. IR 160x175x40 VGS)
VH Roller bearing No cage, full number of rolling elements. Self-retaining rollers 1
WL Y-bearing units Bearings from Series YEL 2-2FF
WM Y-bearing units Bearings from Series YEL 2
WM019 Paired magneto type bearing for grinding spindels X 4 BBE
WM019A Paired magneto type bearing for grinding spindels X 4 BBE
WM020 Tooth profile inspection for toothed rollers (Opel)
WM021 Instructions to machining departments regarding treatment of specially stabilised rings
WM022A Radial bearings Blending of transition from O.D. to chamfer X 4 Any
WM022B Radial bearings Blending of transition from bore to chamfer 4 Any
WM022C Blending of transition from bore to chamfer at the roller guiding flange side of the 4 BT1
inner ring (taper roller bearings)
WM022D Blending of transition from bore to chamfer at the retaining flange side of the 4 BT1
inner ring (taper roller bearing)
WM024 Pinion bearings. (Replaced by CL7A) X 4 BT1
WM025 Internal. Bearings approved by TDT for particular application or to meet customer X 4 Any
requirements. (Replaced by VR001)
WM026 Rolling bearings Axlebox bearings. (Replaced by VA350) X 4 Any
WM028 Sleeves Adapter sleeves, nuts and locking washers, zinc coated (shiny surface), packaging
WM029 Rolling bearings Bearing inner rings expanded X 4 Any
WM031 Rolling bearings Bearings for aeronautical applications, racing vehicles, etc 4 Any
WM032 Rolling bearings Bearings for important applications - extra inspection of standard bearings. Replaced by C8A X 4 Any
WM039 Deep groove ball bearings with resitex cage for high speed applications. X 3 BB1
WM040A Rolling bearings Bearings of stainless steel X 4 Any
WM044 Traction motor bearings (cylindrical roller bearings). (Replaced by VA301) X 4 BC1
WM046 Cylinrical roller bearings with two snap rings in Outer ring - positioning of gaps 4 BC1
WM047 Paired (radial) cylindrical and needle roller bearings. (Replaced by 'DR') X 4 BC; BN
WM048 Cylindrical roller bearings with J1 or MA6 cage. Positioning of cage with respect to X 4 BC1
snap ring groove. (Replaced by VM002)
WM049 NN 30 K; NNU 49 K Different taper angle of bearing bore, series NN 30 K and NNU 49 K 2 BC2
WM050 Osculation values for (radial) spherical bearings - (introduced 68/69) 4 BS2
WM051 Final inspection of large (radial) spherical roller bearings 4 BS2
WM055 Plummer blocks Packaging of plummer blocks complete with bearings, for export
WM056 (Radial) Taper roller bearings for Ford X 4 BT1
WM058 Packaging specifications for (rolling bearings (including preservation) 4 BC
WM059 Radial internal clearance marked on (radial) spherical roller bearing outer rings - all spherical X 4 BS2
roller bearings with tapered bore and D => 400 mm. (Replaced by VK103)
WM060 Roller bearing Any roller bearings. Four loading zones marked on outer ring side faces and positioning line 4 Any
marked on outside diameter. Package marked WM060
WM061 Spacer element pressed steel cage for railway bearings I-96600 and 312708 X 3
WM062 Kiln truck bearings (Repl. by VA201) X 4 Any
WM063 Kiln truck bearings (Repl. by VA201) X 4 Any
WM064 Rolling bearings Bearings for inspection and measuring equipment X 4 Any
WM067 Rolling bearings Bearings with sleeve, marked to ensure radial run-out of bearing, balaces the radial X 4 Any
run-out of sleeve when mounted. Marked on package
WM067A Rolling bearings Position of greatest thickness marked on inner and outer ring. Marked on package X 4 Any
WM068 Surface treatment for rings of spherical plain bearings 4 BL
WM068A Rolling bearings Surface treatment for rings of rolling bearings 4 Any
WM071 Grease filling for railway axlebox bearings I-96600 and 312708, (to be filled in during mounting 4
of bearing into the axlebox)
WM073 Specification for deep groove ball bearings to be mounted in pairs in tandem to carry thrust X 4 BB1
load in one direction. (Replaced by DB, DF, etc.)
WM074 Specification for deep groove ball bearings, or single row angular contact ball bearings to be X 4 BA1; BB1
mounted back-to-back without clearance
WM074A Specification for deep groove ball bearings, to be mounted back-to-back, X 4 BB1
with axial internal clearance
WM075 Specification for deep groove ball bearings, or single row angular contact ball bearings to be X 4 BB1
mounted face-to-face, without clearance
WM075A Specification for deep groove ball bearings, to be mounted face-to-face, X 4 BB1
with axial internal clearance
WM076 Specification for deep groove ball bearings to be mounted in pairs in tandem to carry thrust X 4 BB1
load in one or the other direction
WM081 Nuts Nut parts of hydraulic nut made of special material. (Replaced by Standard) X
WM099 Special treatment for prototype bearings. (Replaced by VR001) X 4 Any
WM099A Special treatment for prototype bearings X 4 Any
WM099B Special treatment for prototype bearings X 4 Any
WM100 Rings Remachining of finished rings
WM101 Bolts Inspection specification for threaded bolts
WM102 Rolling bearings Bearings with low running noise 4 Any
WM103 Marking SKF and Germany on shields or seals of bearings 4 Any
WM104 Ball bearings for line production Werk II 4 BB1
WM105 Manufacturing tolerances for EEC (European Economic Community) - bearings X 4 BB1
(8 bearings of series 63)
WM106 Rolling bearings Rolling bearings, hardening with fixture, under protection gas 4 Any
WM107 Rolling bearings Rolling bearings, hardening under protection gas, reduced grinding allowances 4 Any
WM115 Taper roller bearing, pinion bearings for Ford: surface finish 4 BT1
WM120 Rolling bearings Surface treatment of rolling bearings for high temperature applications 4 Any
WM130 Rolling bearings Rolling bearings for aircraft engines, specifications X 4 Any
V-Nos Could be found in Lotus Notes databases, 'V Number' and 'D7 Specification' 1, 2, Any
3, 4
WR Y-bearing units Bearings from Series YEL 2-2RF
WS Grease 'Wide temperature and silent running' 4 BB1
WT Grease GWB, 'Wide temperature' 4 BA2; BB1
Vxx Product Class 2 Non standardized variants for non standard products
X Bevel gears Gear wheel, left hand
X Precision tapered roller Bore diameter or outer diameter with decimals (inch bearings) 4 BT
bearings (GAMET) Ex.: 160098 X, d = 98,425 (3.7/8")
X Rolling bearings One or more of the boundary dimensions has been altered to conform to ISO international 2 Any
standars. The alteration may apply to a complete bearing series or to individual bearings in a series,
e.g. series 320 X and bearing 51107 X. The suffix is only used during a transitional period. Valid also
for non ISO items altered according to a national norm like DIN. Ex. 60 Z 60 BX
X Drawing no. Sub manufactured bearing, SKF design 4 Any
X HBU bearings Dual source' manufacturing in Tudela, Spain 4 BA2
X INA Series. Cam- support roCylindrical outside diameter (when standard is crowned) 2 BN
X 51x X
X RKS. Sleeving rings Material: steel XC 48 (normalized carbon steel) 4 BV

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X Thrust roller bearings. Full complement 1 BD
Prefix K
X MRC Series Bearing with tapered bore 2 BB1
X Y-bearing housings SY 512 modified in order to comply with ISO 3228
X Y-bearing housings Bearings from Series 4772(00)
X1C New Departure, prefix G BB1
xA Cage centered in the outer ring 3 Any
xB Cage centered on the inner ring 3 Any
xP Cage centered on one or other of the rings, with slotted or broached pockets 3 Any
xR Pin cage 3 Any
xS Cage with lubricant grooves 3 Any
xW Welded cage instead of riveted 3 Any
XX 302, 303, 313, Old RIV-SKF design 1 BT1
320, 322, 323, 329
Y Bevel gears Gear ring, right hand
Y Pressed brass cages. 3 BA1; BB1;
BC1; BS2
Y SKF Ind. housings Closed end. Roller bearing unit
Y Hyatt, prefix F BSA
Y1 Pressed brass cages. Modified Y-design 3 BB1; BS2
Y3 Cages Pressed brass cages. Modified Y-design 3 BB1
Y31 Cages Pressed brass cage. Modified Y3 with changed bore design 3 BA1
Y4 Pressed brass cages. Modified Y-design 3 BB1; BS2
Y41 Pressed brass cage. Modified Y4 with changed bore design 3 BA1
Y6 Pressed brass cages. Modified Y-design 3 BB1
Y61 Cages Pressed brass cages. Modified Y-design 3 BB1
Y6B Pressed brass cages. Modified Y-design, centered on the inner ring 3 BB1
Y9 Pressed brass cages. Modified Y-design 3 BB1
YA Pressed brass cage, centered in the outer ring 3 BC1
YB Pressed brass cage, centered on the inner ring 3 BB1
YK Hyatt, prefix F BSA
YS Hyatt, prefix F BC1
Z Bevel gears Gear ring, left hand
Z Castors and forks Z-seal
Z Needle rollers Roller shape: truncated tapered ends 4
Z Shield (gap seal) at one side of the bearing, generally of pressed sheet metal. 2 Any
Z MRC Series Bearing with one seal 2 BB1
Z Side plate 2 BL
Z Sleeves and nuts Zinc coated
Z Shield (gap seal) at the opposite side of the bearing filling slot. 2 BBF
Z Hyatt, prefix F BSA; BT1
Z INA series Needle roller/thrust ball bearing with cover (e.g. series NKX-Z)
ZA Shields Bent in, straight anchorage 4
ZAP Shields Bent in, straight and split periphery anchorage 4
ZB Shield (gap seal) at the same side of the bearing filling slot. 2 BBF
Z-B Series 60 Knurled thrust washer (locked against rotation) 2 BRB
ZC Shields Bent in, curved anchorage 2
ZCP Shields Bent in, curved and split periphery anchorage 2
ZG MRC Series Bearing with one seal and one snap ring 2 BB1
ZK Tapered bore. Shield at small bore side 2 BB1
ZKB Tapered bore. Shield at large bore side 2 BB1
ZL New Departure, prefix G BB1
ZN (Z + N). Shield at one side and snap ring groove at the other. 2 BB; BL
ZNA (Z + NA) Shield and snap ring groove at the opposite side of the filling slot 2 BBF
ZNAR (Z + NAR) Shield and snap ring groove with snap ring at the opposite side of the filling slot 2 BBF
ZNB Shield and snap ring groove at the same side. 2 BB; BL
ZNBR Shield and snap ring groove with snap ring at the same side. 2 BB; BL
ZNR (Z + NR). Shield at one side and snap ring groove with snap ring at the other. 2 BB
ZP Shield in composite material 2 Any
ZRZ (Z + RZ): Shield (Z) at one side and low friction contact seal (RZ) at the other side of the bearing 2 BB1
ZW INA series Needle roller and cage assembly, double row
ZX MRC Series Bearing with Tapered bore and one seal 2 BB1
Zxxx Same as the sensor prefix designation 4 Any
ZZ MRC Series Bearing with two seals 2 BB1
ZZG MRC Series Bearing with two seals and one snap ring 2 BB1
ZZX MRC Series Bearing with tapered bore and two seals 2 BB1
Z3 Nuts Nuts, Zinc and Cr3 coated (TRIVALENT)

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