Product Catalog for

Paper Manufacturing Machinery

CAT. No. 8901-Ⅲ/E

1
 Products for Paper
Manufacturing Machinery

Photo : Ishinomaki Mill, Nippon Paper Industries Co., Ltd.

INDEX Ref. Page

ULTAGE Series P5
Spherical Roller Bearings [Type EA, Type EM] P7 ~ 8
ULTAGE Series
Sealed Spherical Roller Bearings [Type WA], Plummer Blocks P6

RustGuard Corrosion-Resistant Bearings P9 ~ 10

Long Operating Life Bearings – EA Type P11 ~ 12
Solid Grease Bearings P13 ~ 14
MEGAOHM™ Insulated Bearings P15
Triple-Lip Sealed Bearings for Bearing Units P16
ULTAGE Series
Thrust Spherical Roller Bearings P17 ~ 18

Constant Velocity Joints P19 ~ 20

Size Charts P21 ~ 34
Inspecting and Maintaining Bearings, Installing Tapered Bore Roller Bearings P35 ~ 36
Bearing Damage – Typical Examples & Causes P37 ~ 38

Related Catalogs Cat. No.

Ball and Roller Bearings 2202/E

ULTAGE Series Spherical Roller Bearings [Type EA, Type EM] 3033/E

ULTAGE Series Sealed Spherical Roller Bearings [Type WA] 3703/E

ULTAGE Series Thrust Spherical Roller Bearings 3034/E

Large Size, Long Operating Life EA Bearing 3024/E

Solid Grease Bearings 3022/E

MEGAOHM™ Insulated Bearings 3030/E

Bearing Units 2400/E

Triple-Lip Sealed Bearings for Bearing Units 3905/E

Plummer Blocks 2500/E

Constant Velocity Joints for Industrial Machinery 5603/E

TRI-BALL JOINT Constant Velocity Joints (Small and Medium size) 5602/E

Care and Maintenance of Bearings 3017/E

2
 Paper For stable, high reliability
Manufacturing
Process performance...
The paper making process requires bearings having specific
capabilities for each part of the process. NTN ensures
reliable paper production by providing bearings that are
optimally suited for each process.

Pulp Manufacturing Paper Machine Wire Section Paper Machine Press Section
Process Paper formation begins by Additional water is removed from the
dewatering the paper stock feed wet paper sheet by the press rolls

➊ ULTAGE series sealed spherical ➌ ULTAGE series spherical roller

roller bearings [Type WA] ➌ ULTAGE series spherical roller bearings [Type EA, Type EM]
bearings [Type EA, Type EM] ➍ RustGuard corrosion-resistant
➋ ULTAGE series thrust spherical roller
bearings ➍ RustGuard corrosion-resistant bearings
bearings ➎ MEGAOHM™ insulated bearings
➐ Solid grease bearings
➒ Triple-Lip sealed bearings for ➐ Solid grease bearings ➐ Solid grease bearings
bearing units ➑ Constant velocity joints ➑ Constant velocity joints

1 2 3 4

ULTAGE series sealed spherical ULTAGE series thrust spherical ULTAGE series spherical roller bearings RustGuard corrosion-resistant
roller bearings [Type WA] roller bearings [Type EA, Type EM] bearings

3
 Paper Machine Dryer Section Calender Stack Reel & Winder
& Size Press Rolls produce a smooth, glossy Main paper take-up roll and rewinding
Paper sheet drying is completed and paper surface into smaller size rolls
coatings are applied by the size press

➌ ULTAGE series spherical roller ➌ ULTAGE series spherical roller ➌ ULTAGE series spherical roller bearings
bearings [Type EA, Type EM] bearings [Type EA, Type EM] [Type EA, Type EM]
➏ Long operating life EA bearings ➐ Solid grease bearings ➐ Solid grease bearings
➑ Constant velocity joints ➑ Constant velocity joints ➑ Constant velocity joints

5 6 7 8 9

MEGAOHM™ insulated Long operating life EA bearings Solid grease bearings Constant velocity joints Triple-Lip sealed bearings for
bearings bearing units

4
 ULTAGE Series

Spherical Roller Bearings [Type EA, Type EM]

Long operating life, higher load capacities and enhanced
high-speed operation provide maximum equipment productivity
Construction

Type EA Type EM

Outer ring
• With oil inlets and oil
groove
• Optimal curvature

Rollers
• Symmetrical design
• Larger rollers
• Maximum number of
rollers
Cage Cage
Inner ring
• Window-type pressed steel • One-piece machined cage
cage • No rib required
• Optimal curvature

Features

● High-load capacity ● Long operating life

By using larger diameter, increased number of rollers... By increasing the load capacity...

65% 5 times longer

Basic dynamic
load rating higher Operating life
Up to
Up to (compared to NTN
conventional products)
(compared to NTN conventional products)

35% higher
Basic static
load rating
Up to (compared to NTN
conventional products)

● High-speed performance ● Heat-resistant performance

By using optimized curvatures and a new retainer design... By using advanced material heat treatment technology...

20% 200°C
Maximum Dimensional
shaft speed higher stability
Up to (compared to NTN
conventional products)
Up to

Refer to the technical data (p-7)

Refer to the size charts (p-21)

"ULTAGE" (a name created from the combination of "Ultimate," signifying refinement, and"stage," signifying NTN's
intention that this series of products be employed in divers eapplications) is the general name for NTN's new generation of
bearings that are noted for their industry-leading performance.

5
 Products for Paper Manufacturing Machinery

ULTAGE Series

Sealed Spherical Roller Bearings [Type WA]

Features

● High performance sealing

Long operating life with high contamination resistance is achieved by using
the NTN EA internal specifications with a specially designed contact-type
rubber seal.

● Interchangeability
Can be installed into standard type plummer blocks by adjusting fixing ring size.
These bearings are
shipped packed
Bearing Specifications with grease

sLubricant grease sPremissible alignment angle [Rotation torque test results]

• Lubricate with lithum based oil grease • 0.009 rad (0.5˚) 200
containing extreme pressure additives

Rotation torque [N·mm]

sPremissible operating temperature range
• Grease pack amount : 15 to 25% of 150
space capacity • Bearing temperature : −20 to 110˚C
[Bearing rotation torque test conditions] 100
sPremitted rotational speed Bearing : WA22218EALLSD1
• When re-lubricating : dn ≤ 60 × 103 Load : Radial load 294N 50
Shaft speed : 200 - 1400 min-1
• When not re-lubricating : dn ≤ 80 × 103 Lubrication : Lithum based grease 0
containing extreme 0 200 400 600 800 1000 1200 1400 1600
[dn = d (bearing bore diameter [mm]) × n (shaft speed [min-1] )] pressure additives Shaft speed [min-1]
Grease pack amount : 20% of space capacity
Refer to the size charts (p-29)

Plummer Blocks
Features

● Manufactured and designed at NTN’s exclusive casting

plant in Japan to provide seamless integration
Suitable for withstanding impact, vibrations, and heavy loads.
s
Suitable for a broad operating temperature range (−20 to 300°C✽).
s
✽ This is the temperature range for the plummer block body. Special heat treatment is required for bearings.

sSelectable lubrication method (grease or oil).

Plummer block seal types

Rubber seal Felt seals

■プランマブロック用各種シール
Rubber seals are mainly used for grease lubrication Felt seals and rubber seals are interchangeable.
with a maximum shaft speed of 5-6 m/s /. These can only be used with grease lubrication. Felt
seals are not suitable for use in high dust, humidity
environments. The maximum shaft speed for felt seals
is approximately 4 m/s.

S-shaped seals Labyrinth seals

S-shaped seals (synthetic rubber seals w/spring) Labyrinth rings are easy to install by O-ring
have excellent sealing performance and are usable for attachment and are loosely fitted to flexibly follow
grease and oil-based lubricants (plummer blocks have the extension and contraction of the shaft
a special specification). The maximum shaft speed (h9 shaft tolerance).
for S-shaped seals is 10-12 m/s. Caution is required
regarding the surface finish and hardness of the shaft
especially in the seal contact area.

6
 ULTAGE Serise Spherical Roller Bearings
Long operating life, higher load capacities and enhanced high-
speed operation provide maximum equipment productivity

sType EA, Type EM

World’s Highest Standard Load Capacity
By maximizing the roller diameter, the number of rollers and roller design,
longer operating life and higher load ratings have been achieved. With this
improvement maintenance cycles can be extended.
➀ Basic Dynamic Load Rating : Up to 65% higher
(compared to NTN conventional products)

➁ Basic Static Load Rating : Up to 35% higher

(compared to NTN conventional products)

➂ Operating Life : Up to 5 times longer

(compared to NTN conventional products) NTN standard Type EA
product

●C
 omparison of other manufacturer’s cataloged ●C
 omparison of other manufacturer’s cataloged
basic dynamic load rating values (Cr) basic static load rating values (Cor)
22216 (ø80 × ø140 × 33) 22216 (ø80 × ø140 × 33)
300 300
Basic dynamic load rating [kN]

Basic static load rating [kN]

280 280

260 260

240 240

220 220

200 200
EA Company A Company B Company C EA Company A Company B Company C
(ULTAGE) (ULTAGE)

World’s Highest Standard Maximum Shaft Speed

Higher operating speeds have been achieved by using an optimized design pressed steel cage.

Limiting speed : Up to a 20% increase when compared to NTN conventional products

The results of comparative bearing temperature rise testing under circulating oil conditions shows that this bearing reduces temperature
rise at a lower torque compared to other manufacturer’s bearings.

●C
 omparison of other manufacturer’s cataloged ●T
 emperature rise test results (circulating oiling)
shaft speeds 22216 (ø80 × ø140 × 33)
22216 (ø80 × ø140 × 33)
5,000 90
ULTAGE EA
Maximum shaft speed [min-1]

Outer ring temperature [˚C]

Oil Company A
4,000 80
Grease Company B
3,000 70

2,000 60

1,000 50

0 40
0 2000 4000 6000 8000
ULTAGE Company A Company B Company C
EA Shaft speed [min-1]

7
 Products for Paper Manufacturing Machinery

Enhanced Loads : Smaller Bearing

Due to higher load capacity a smaller, lighter weight bearing is used to achieve a longer life.

Basic Dynamic Basic Static

Part Number Basic Dimensions Weight Life Ratio
Load Rating Load Rating
kN mm kg
22220B 315 415 ø100 × ø180 × 46 4.95 1
22217EA 324 330 ø85 × ø150 × 36 2.59 1.1

20% 48% 10% 22220B 22217EA

Overall size reduction Weight ratio Calculated operating life

up to 20% reduced by 48% increased by 10%

Outer Ring Oil Groove/Holes Standard

ULTAGE bearings are equipped with oil groove/holes as a standard feature. D1 is Japan specification,
W33 is Europe specification. (22205, 22206, and 22207 support W33 specification)

Wo
Zo×φdo Bearing Outside Diameter Number of Oil Holes
mm

D1 W33

Including Less Than Zo Zo

— 320 4 3
320 4201) 8 3
1) 420 mm is included in this size class. Bearing outer ring shape

Wo and d o differ according to the model number. Do not use the oil holes as position
Refer to the catalog bearing size charts. locating holes.

Improved Easy Handling

Assembly, disassembly, and re-lubrication have been
improved due to the optimized pressed steel cage design.

Minimized roller projection Grease dispersion to rolling

enables quick and easy surfaces is enhanced.
disassembly, repair and
reassembly.

[Allowable Misalignment] ● 0.06 Cr < dynamic equivalent radial load : 0.009 rad (0.5°)
● Dynamic equivalent radial load ≤ 0.06 Cr : 0.035 rad (0.2°)
✽ If the installed misalignment is greater than recommended, there is a risk of roller/cage protrusion and impact to surrounding components.

8
 RustGuard Corrosion-Resistant Bearings

Rust problems emerge during equipment shut downs when rolls are stationary in the wet
environments of the Wire Section and Press Section.
ULTAGE bearings support stable production in addition to corrosion-resistant performance.

Typical Failure Mechanism

Rust caused by leaving

Flaking starts to occur
bearings in water-saturated
in rusted areas
environments

Machine
stoppage

Downtime caused rust Flaking

Typical Examples

Basic Basic
Service Part Number Basic Dimensions Dynamic Static
B Load Rating Load Rating
φD φd mm kN

d D B C Cr Cor
Press rolls MX2-22210EM 50 90 23 − 125 117
φD φd
Wire rolls MX2-22318EMK 90 190 64 − 668 652
Wire rolls MX2-23234EMK 170 310 110 − 1 700 2 070
B
C Wire rolls MX2-6TS3-6E-22336EMK 180 380 126 − 2 420 2 810
Press rolls MX2-22320EMK 100 215 73 − 827 844
Suction press rolls MX2-23056EM 280 420 106 − 2 170 3 150
Suction press rolls MX2-230/850BL1K 850 1 220 272 − 9 750 22 700
φD φd
Wire rolls MX-6314T2LLU 70 150 35 − 104 68
Wire rolls MX50-4T-NA558/552D 60.325 123.825 79.375 63.500 158 216
Wire rolls MX50-4T-NA759/752D 88.900 161.925 104.775 85.725 270 385

9
 Products for Paper Manufacturing Machinery

Features

● Impact on operating life

Special phosphate coating treatment does not reduce the operating life.

2000

No flaking (testing ended)

1600
Unique coating treatment
technology eliminates impact
Time [hours]

1200 on operating life

800 695 hours

[Test conditions]
400 Bearing : #22318
Bearing rated life (Number of rolling elements halved)
L10h = 333 hours Load : Fr = 88.3 kN
0 Shaft speed : n = 2500 min-1
Operating life test results Lubrication : circulating oil VG220, 2 ℓ / min

● Improved corrosion resistance

After a corrosion-resistance performance comparison between untreated rollers (new) and coated
rollers (after the operating test), the rust results on the wet surfaces shows that the coated rollers
possess corrosion resistance even after the operating test.

Rust results : After immersion in tap water for 24 hours

Significant rust on wet surfaces Little rust on wet surfaces

Untreated rollers Coated rollers

(New rollers were immersed in water) (Immersed in water after operating for 1670 hours)

● Applicable with various bearing types Deep groove

ball bearings
Can be applied to all types of bearings, such as spherical roller
bearing, tapered roller bearing, etc.
Furthermore, it is also suitable for all types of materials, such
as bearing steels and case-hardened steels (below : carburized
steels).

Double row tapered

Spherical roller roller bearings
bearings

10
 Long Operating Life EA Bearings

Case-hardened steel has been specially heat treated by composite carburizing and nitriding
heat treatment. Therefore, the critical bearing surfaces have been strengthened against
surface damage to achieve a dramatic increase in operating life.

Typical Failure Mechanism

Significant fit stress is caused

by entry of foreign material and
sudden temperature rise.

Machine
stoppage

Inner ring breakage Smearing, peeling

Poor lubrication

Typical Examples

Basic Basic
B Service Part Number Basic Dimensions Dynamic Static
Load Rating Load Rating
mm kN

d D B Cr Cor
TS3-EA3-22244EMK 220 400 108 2 210 2 690
TS3-EA3-22322EM 110 240 80 975 972
TS3-EA3-22324EM 120 260 86 1 170 1 280
TS3-EA-23032EMK 160 240 60 748 1 000
φD φd
TS3-EA-23034EMK 170 260 67 914 1 240
Dryer Section
TS3-EA-23038EMK 190 290 75 1 140 1 570
TS3-EA-23040EMK 200 310 82 1 310 1 790
TS3-EA3-23144EMK 220 370 120 2 190 2 940
TS3-EA3-23148EMK 240 400 128 2 510 3 500
TS3-EA-23238EMK 190 340 120 1 990 2 480

11
 Products for Paper Manufacturing Machinery

Features

5 times
● Improved bearing strength
Operating life improvement
for lubricant contaminated by Material and fitting stress strength has been improved by combining
foreign material : nitrogen during the proper heat treatment conditions.
(Compared to NTN's standard carburized steel bearings)

sOperating life for lubricant

contaminated by foreign 99
Bearing : 30206
material Load : Fr = 17.64 kN
Shaft speed : n = 2000 min-1
Figure 1 shows the results of the 80 Lubricant : turbine oil VG56 oil bath
Foreign material
Probability of damage [%]

operating life comparison test for 50 particle size : 100-180 μm

Hardness : HV700-800
small tapered roller bearings using Gas atomized powder
lubricant contaminated by foreign Contents : 1 g / ℓ
20
material. EA bearings show an
operating life over 5 times longer 10

than standard carburized steel 5 L10 (h) Life ratio

bearings. Standard carburized
steel bearings 22.2 1.0
Standard carburized steel bearings
EA bearing 120.0 5.4
EA bearing
1
100 2 4 6 8 101 2 4 6 8 102 2 4 6 8 103 2 4 6 8
Operating life [hours]

Figure 1. Test results of operating life for lubricant contaminated by foreign material

sFatigue strength
Fatigue cracking causes catastrophic bearing failure. Although this form of damage is anticipated under harsh operating conditions,
EA bearings possess a superior fatigue operating life above standard carburized steel bearings as shown in ring rotating fatigue
strength testing and rolling fatigue strength testing by applying a large fitting stress, as shown in tables 1 and 2 respectively.

Table 1. Test results of ring rotating fatigue strength

1.5 times
Bearings L 10 (Hours) × 104 Cycles L 10 Ratio
Fatigue cracking life Standard carburized
improvement : steel bearings 6 670 1

EA bearing 9 020 1.4

(Compared to NTN's standard carburized steel bearings)
[Test conditions]
Test equipment : NTN ring rotating fatigue strength test equipment
Load : 9.8 kN
Load speed : 8,000 cpm

Table 2. Test results of rolling fatigue strength using a large fitting stress

3 times longer
Bearings L 10 (Hours) × 104 Cycles L 10 Ratio
Operating life under Standard carburized
high fitting stress is steel bearings 2 030 1

EA bearing 6 240 3.1

(Compared to NTN's standard carburized steel bearings)
[Test conditions]
Test equipment : NTN line contact type rolling operating life test equipment
Fit stress : 425 MPa applied to rolling surfaces
Load : 4.9 kN
Load speed : 6120 cpm

12
 Solid Grease Bearings

Lubricant leakage control is maximized using a solid lubricant composed of lubricating

grease and polyethylene.
Long-term use is made possible by continuous lubrication during equipment operation.

sSpot-pack sFull-pack
PE grains

Grease
PE grains
PE grains

Grease
PE grains

Diagram model of
Solid Grease after curring
Deep groove ball Spherical roller bearings
bearings are equipped are full-pack as standard
with spot-pack as
standard

Typical Failure Mechanism

Grease leakage
Poor Bearing
due to water
lubrication damage
penetration
Production
slowdown

Machine
stoppage

13
 Products for Paper Manufacturing Machinery

Features

● Minimal lubricant leakage ● Resistant to emulsification

Lubricant is fed steadily onto the rotating surfaces by the heat Solid Grease is resistant to leaking even when bearings are
and centrifugal force of the bearings. Minimal lubricant leakage subjected to large vibration and centrifugal force. The grease is
prevents contamination of the surrounding area. less prone to emulsification even if there is water penetration,
exhibiting superior lubrication characteristics compared to
general-purpose greases.

Bearing Specifications

● Main ingredients and premissible operating temperature range

Permissible Operating
Solid Grease (product code) Resin Lubricant Temperature Range
−20~80˚C (−4~194˚F)
General-purpose Solid Ultra high molecular
Li–mineral oil grease max. 60˚C (140˚F) at regular
Grease (LP03) weight polyethylene
operation conditions

● Production range

Solid Grease bearing for general use (LP03)

™: Standard type　 : Special type　 : Not available
Lubricant Packing Method Bearing Sizes
Bearing Designs
Spot-pack Full-pack (Bearing Outside Diameter Dimensions)
Spot-pack

Deep groove ball bearings ™➊ Up to 350 mm diameter

Miniature/small dia. ball

™➊ (Bearing inside diameter : 6 to 9 mm)
bearings

Self-aligning ball bearings ™➊ Up to 250 mm diameter

Deep groove ball bearings Bearing units
Spherical roller bearings ™➊ Up to 250 mm diameter

Bearing units ™➊ Up to 300 mm diameter

Needle roller bearings ™➋ ➋

Full-pack

➊ Deep groove ball bearings are equipped with spot-pack and ZZ shields as standard. Certain bearing
configurations and model numbers listed as standard specification are not available. Contact NTN for
further information.
➋ Dimensions of the needle roller bearings differ for each bearing configuration. Contact NTN for further
information.
Note : Standard bearings are not manufactured from corrosion resistant materials. However, stainless
steel bearings are available. Needle roller bearings Spherical roller bearings

● Minimum required load

In case of full-pack, in order for the rolling elements to rotate without sliding, at
least approximately 1% of the basic dynamic load rating is required. Contact B
NTN for more information.
Typical examples of Solid Grease bearings for pulp mill bleach plant
Basic Dynamic Basic Static
Part Number Basic Dimensions
Load Rating Load Rating
φD φd
mm kN
d D B Cr Cor
22209EAKD1/LP03 45 85 23 121 113

22216EAKD1/LP03 80 140 23 278 287

Remark : Items marked ‘K’ indicate bearings with a bore taper ratio of 1/12.
Tapered Bore
(Type EA)

14
 MEGAOHM™ Insulated Bearings

Electrolytic erosion caused by electric current leakage may occur in bearings used
in electrical machinery, such as motors and generators, etc., which shortens the operating life of the bearings.
NTN’s MEGAOHM™ insulated bearings have been developed to prevent electrolytic erosion.
These bearings are available in ceramic or resin types and can be selected to match the application.
MEGAOHM™ insulated bearings possess the following excellent features.

Features

● Has insulation properties of 100 MΩ or higher when 500 VDC is applied.

● Interchangeable with ISO 492, DIN 620, and JIS 1514 standard type bearings.
● Choose from a broad lineup of insulating materials to match the application requirements for
withstanding voltage and impact resistance, etc.
● Compatible with bearings of inner diameter sizes of 50 to 160 mm.
 ertain bearing configurations and model numbers among the bearing sizes are not available. Contact NTN for
✽C
further information.

Typical Failure Mechanism

Sparking caused by Change in material Peeling of weakened layer

electrical current properties causing bearing damage

Machine
stoppage

Construction

sCeramic insulated bearings sResin insulated bearings

Outer
Outer ring
ring
Rolling
Matrix Rolling element
element
Retainer Retainer
Insulating layer
Inner Inner
ring ring

Cylindrical roller Deep groove ball Cylindrical roller Deep groove ball
bearings bearings bearings bearings

Operating caution : This bearing has an insulating effect and requires appropriate lubrication conditions.
Check the conditions and location of use. Contact NTN for technical support.
15
 Products for Paper Manufacturing Machinery

Triple-Lip Sealed Bearings for Bearing Units

Bearings with excellent dust and water-resistant triple-lip seals achieve a longer operating life
in dusty and wet environments.

Features

●T  he excellent dust and water-resistance ability extends the bearing replacement cycle, so
maintenance costs are reduced.
● Bearing unit covers, which are typically required, are no longer needed , reducing the size of
the bearings.
● Triple-lip seals are suitable for UC configuration bearings, so they are not only usable with the
lubricating method but also compatible with the inserts in standard bearing units. Therefore,
repair and replacement is easily accommodated.

Construction

Galvanized steel cover

Triple-lip seal

sWater-resistance performance test results

[Test conditions]
300
Test bearing : UC205D1 Standard type, LLJ (low-torque type),
LLS (high-torque type)
250
Shaft speed : 800 min-1
Load : None (belt tension only)
Number of cycles

200

Test mode : Intermittent operation

150 (6 hours run / 6 hours stop = 1 cycle)
Test equipment : NTN muddy water test equipment
100
Muddy water specification : JIS Z8901 Kanto Loam Class 8

50 Dust to water mixture ratio : 1:10 (ratio by weight)

Quantity of muddy water : 1/4 to 1/3 of outer ring immersed
0
Standard type LLJ LLS
Testing termination conditions : Muddy water leakage from bearing,
(Low-torque) (High-torque) bearing seizure, 0.6 G vibration when operating

Refer to the size charts (p-31)

16
 ULTAGE Series

Thrust Spherical Roller Bearings

Shaft washer
 ptimal curvature
●O

Cage
 indow-type pressed steel
●W
cage

Housing washer
 ptimal curvature
●O

Roller
 arger rollers
●L
 aximum number of rollers
●M

Long Enhanced Improved

high-speed
operating life performance handling
• W orld’s highest standard • W orld’s highest standard • Easy to lubricate design
high-load capacity maximum shaft speed • Compatible with oil or grease
• Extended maintenance cycle • Simple pressed steel pocket- lubrication
type cage
　• Heat resistant to 200˚C

Features

● World’s highest standard high-load

capacity
Long operating life with high-load capacity has been achieved
by maximizing the size and number of rollers.

70% higher
Basic dynamic
load rating :
Up to (compared to NTN
conventional products)

6 times longer
NTN conventional ULTAGE
Operating life : product
Up to (compared to NTN conventional products)
● Specifications for pressed steel
pocket-type cage
Usage with lubrication by oil and grease has been made
● World’s highest standard maximum possible by using a simplified pressed steel cage-type cage,
shaft speed expanding the usage range.
High shaft speed has been achieved by using a new pressed
steel cage.
● Heat resistant up to 200˚C

20%
Using a special heat treatment as standard, excellent
Up to higher dimensional stability in high-temperature applications yields a
(compared to NTN
conventional products) longer operating life.

17
 Products for Paper Manufacturing Machinery

Allowable Misalignment Allowable Radial Load

s1 ~ 2° sFr / Fa ≦ 0.55
　Fr : Radial load
　Fa : Axial load
Alignment angle

Maximum Shaft Speed Lubrication Method

The maximum shaft speeds listed in the bearing size charts Thrust spherical roller bearings have areas in between the
are reference values applicable to recommended bearing bearing rollers and raceway collar surface, etc., where it is
lubrication and cooling conditions. more difficult for the lubricant to access. Therefore, ensure the
The maximum shaft speeds listed in the catalogs are defined bearings are supplied with sufficient lubrication. When using
as follows. grease, pack the housing space with grease to ensure the
static bearing spaces in the vertical and horizontal axes of the
sFor oil lubrication
housing, shown in figures 1 and 2 respectively, are properly
The shaft speed at which the temperature of the housing washer lubricated.
reaches 80˚C when 1 liter / 0.25 gallons of VG32 spindle oil is
supplied at ambient temperature viscosity, operating at 5% of the sVertical axis
basic static load rating Coa. ➀ ➁
Grease
sFor grease lubrication
Housing
The shaft speed at which the temperature of the housing washer
reaches 80˚C when the bearing space capacity is 100% packed Bearing : Static space 100% packed

with lithium grease (consistency : NLG13), running in has been (Fig. 1-➀)
Housing : Space 100%
completed, operating at 5% of the basic static load rating Coa. ➂
(Fig. 1-➁➂)
If the conditions of use (operating load, rotational speed Fig. 1 : Grease lubrication in the vertical axis
pattern, lubrication condition, etc.) differ for either lubrication
sHorizontal axis
method, the temperature rise of the bearing will also differ.
Housing Grease
Therefore, select a bearing with a sufficient margin of permitted
rotational speed, listed in the catalog. Furthermore, contact
Bearing : S
 tatic space 100% packed
NTN if the bearing application will exceed 80% of the maximum
➁ (Fig. 2-➀)
shaft speed listed in the bearing size charts.
Housing : Space on the side of the
bearing washer 100% packed
➀ (Fig. 2-➁)
Fig. 2 : Grease lubrication in the horizontal axis

Performance Test Results

● Temperature rise test
Test bearing :
(1) Vertical axis (2) Horizontal axis (ULTAGE)
Test bearing :
[Test conditions] [Test conditions]
(ULTAGE) Bearing model No. : 29418E
Bearing model No. : 29418E
(ULTAGE thrust spherical roller bearing) Fa (ULTAGE thrust spherical roller bearing)
Axial load : 98 kN (5% Coa) Axial load : 98 kN (5% C oa )
Shaft speed : 1000 to 2200 min-1 Shaft speed : n = 1000 to 2200 min-1 Fa
Lubrication method : Oil lubrication Lubrication method : O
 il lubrication
(circulating oiling) (circulating oiling)
Test equipment : Fig. 3 Test equipment : Fig. 4

Fig. 3 : Test bearing arrangement Fig. 4 : Test bearing arrangement

[Test results] [Test results]
50 50
Housing washer temperature rise [˚C]

Conventional Conventional
Housing washer temp. rise [˚C]

product product
40 ULTAGE 40 ULTAGE

30 30

20 20

10 10
500 1000 1500 2000 2500 500 1000 1500 2000 2500
Shaft speed [min-1 / rpm] Shaft speed [min-1]

Refer to the size charts (p-33)

18
 Constant Velocity Joints
Superior performance of constant velocity joints

No lubrication Boot-sealed to enable operation for prolonged periods

required without lubricating.

They ensure high quality manufacturing due to their

Low vibration/noise
low vibration/noise and efficient rotation (constant
efficient rotation
velocity rotation) compared to other couplings.

These joints efficiently transfer rotational torque from

They are boot-sealed. Therefore, there is no loss of an input (electric motor, etc.) to an output (roller, etc.)
Ambient environment
grease and clean environments can be maintained. across a variety of angles and distances.
Roller Reduction
They are easy to handle because, unlike cross-joints, Joints gear
Electric
motor
Easy handling they require no left-right angle/phase matching or
centering during installation.

Constant velocity joints are covered by a boot.

Safety Therefore, they are safe to handle without risk of
Joint (coupling)
trapping fingers in cross-joint yokes.

sBJ Outer ring

Outer ring
● BJ disc type Cage ● BJ cup type
Cage

Balls Balls

Inner ring Inner ring

Boot Boot

Extendable by spline couplings

● Excellent high-speed rotation performance ● Max. permitted angle : 25°

● Max. permitted angle : 14-18° ● Excellent seal performance

sDOJ/BC couplings
Outer ring
● DOJ ● BC coupling
Outer ring
Cage
Balls
Balls Cage

Inner ring
Inner ring

Boot
Boot

Extendable ball groove Extendable ball groove

● Extendable inside the joint while under torque load ● No need to center/easy to install
● Max. permitted angle : 68mm to 200mm size : 20° ● Max. permitted angle : 5°
225mm to 625mm size : 8° to 10° ● Extendable inside main body

19
 Products for Paper Manufacturing Machinery

Constant velocity joints are completely isokinetic without fluctuation in angular velocity

Constant velocity joints Cross-joint 1.1

Output/input angular velocity

CJ angle θ = 20°
CJ angle θ = 10°
1.05

θ1 1
θ1
θ2
θ2
0.95 NTN’s CVJ

θ1 θ2 0.9
θ1 θ2 0 45 90 135 180 225 270 305 360

Rotation phase angle [°]

By using only a single joint By using a pair of joints

θ1 ≠ θ2 is allowed θ1 = θ2 is allowed
Phase matching is not required Phase matching is required

BC Coupling

BC couplings manufactured by NTN can be used in replacement of

general couplings.➊
Comparison of coupling types (50 mm bore diameter comparison)

Take a closer look at the easy installation/removal characteristics,

Coupling Function Chain Gear Disc Rubber NTN BC
degree of angular deflection, and eccentricity that these BC Coupling Coupling Coupling Coupling Couplings
couplings can easily cope with.
Maximum angle of
1.0 1.5 1.0 0.3 5.0
deflection (° )

Chain Gear Disc Rubber

Coupling Coupling Coupling Coupling Maximum degree of
0.4 1.0 0.2 0.2 5.0
eccentricity (mm)

Maximum torque (N•m) 932 932 775 490 932

Maximum distance
By substituting with BC couplings... 12 8 12 3 103
Replacement between shafts (mm)

No centering required Outside diameter (mm) 130 140 143 120 134
Improve work efficiency, reduce
maintenance man-hours
Weight (kg) 6.2 7.5 6.9 6.7 8.5
No lubrication required
Boot-sealed to enable operation for Independent installation Not Not Not Not
prolonged periods without lubricating. Possible
and removal possible possible possible possible
BC coupling Absorb vibration No centering or
Maintenance Time required for centering re-lubrication
required

➊ Replacement may not be possible depending on conditions. Check the conditions and location of
use. Contact NTN for technical support.

20
 Size Charts

ULTAGE Series Spherical Roller Bearings [Type EA, Type EM]

B B
WO WO
dO dO
r r ra

r r ra

φ D φ D1 φ d φ d1 φ D φ D1 φ d φ d1 φd φ Da φ da
Cylindrical bore (Type EM) Cylindrical bore (Type EA) Tapered bore (Type EA)

Basic Dynamic Basic Static Basic Dynamic Basic Static

Basic Dimensions Permitted Rotational Speed
Load Rating Load Rating Load Rating Load Rating
mm kN kgf min-1
Grease Oil
d D B r s min ➁
Wo do Cr Cor Cr Cor Lubrication Lubrication
52 18 1 3 1.5 57.3 46.1 5 840 4 700 10 400 13 000
25
52 18 1 3 1.5 57.3 46.1 5 840 4 700 10 400 13 000
62 20 1 4 2 75.7 64.5 7 720 6 580 8 800 11 000
30
62 20 1 4 2 75.7 64.5 7 720 6 580 8 800 11 000
72 23 1.1 5 2 100 92 10 200 9 380 7 500 9 400
35
72 23 1.1 5 2 100 92 10 200 9 380 7 500 9 400
80 23 1.1 5 2.5 116 105 11 800 10 700 6 800 8 500
80 23 1.1 5 2.5 110 98 11 200 10 000 6 800 8 500
40
90 33 1.5 6 3 169 152 17 200 15 500 5 400 6 600
90 33 1.5 6 3 169 152 17 200 15 500 5 400 6 600
85 23 1.1 6 2.5 121 113 12 300 11 500 6 100 7 700
85 23 1.1 6 2.5 116 106 11 800 10 800 6 100 7 700
45
100 36 1.5 6 3 206 187 21 000 19 100 4 600 5 700
100 36 1.5 6 3 206 187 21 000 19 100 4 600 5 700
90 23 1.1 6 2.5 130 124 13 300 12 600 5 700 7 200
90 23 1.1 6 2.5 125 117 12 700 11 900 5 700 7 200
50
110 40 2 7 3.5 250 232 25 400 23 700 4 300 5 300
110 40 2 7 3.5 250 232 25 400 23 700 4 300 5 300
100 25 1.5 6 3 155 148 15 800 15 100 5 300 6 700
100 25 1.5 6 3 148 140 15 100 14 300 5 300 6 700
55
120 43 2 8 3.5 296 274 30 200 28 000 3 900 4 800
120 43 2 8 3.5 296 274 30 200 28 000 3 900 4 800
110 28 1.5 7 3 187 181 19 100 18 400 4 800 6 000
110 28 1.5 7 3 179 171 18 300 17 400 4 800 6 000
60
130 46 2.1 9 4 340 319 34 700 32 600 3 600 4 600
130 46 2.1 9 4 340 319 34 700 32 600 3 600 4 600
120 31 1.5 8 3.5 226 224 23 100 22 900 4 400 5 500
120 31 1.5 8 3.5 217 212 22 100 21 600 4 400 5 500
65
140 48 2.1 9 4 369 343 37 600 35 000 3 300 4 100
140 48 2.1 9 4 369 343 37 600 35 000 3 300 4 100
125 31 1.5 7 3.5 235 240 24 000 24 400 4 100 5 200
125 31 1.5 7 3.5 235 240 24 000 24 400 4 100 5 200
70
150 51 2.1 10 5 420 396 42 800 40 400 3 000 3 800
150 51 2.1 10 5 420 396 42 800 40 400 3 000 3 800
130 31 1.5 7 3.5 244 249 24 800 25 400 4 000 5 000
130 31 1.5 7 3.5 244 249 24 800 25 400 4 000 5 000
75
160 55 2.1 10 5 491 467 50 100 47 600 2 900 3 600
160 55 2.1 10 5 491 467 50 100 47 600 2 900 3 600
140 33 2 8 3.5 278 287 28 400 29 300 3 700 4 600
140 33 2 8 3.5 267 272 27 300 27 700 3 700 4 600
80
170 58 2.1 10 5 541 522 55 200 53 200 2 700 3 400
170 58 2.1 10 5 541 522 55 200 53 200 2 700 3 400
150 36 2 8 3.5 324 330 33 000 33 600 3 400 4 300
150 36 2 8 3.5 324 330 33 000 33 600 3 400 4 300
85
180 60 3 11 5 599 604 61 100 61 600 2 600 3 200
180 60 3 11 5 599 604 61 100 61 600 2 600 3 200
➀ Items marked ‘K’ indicate bearings with a bore taper ratio of 1/12. ➁ Indicates the minimum allowed chamfer dimension r.

21
 Products for Paper Manufacturing Machinery

Dynamic equivalent radial load Bearing Number

Pr = XFr + YFa

Fa Fa
　　≦ e 　　> e 222 16 EA K D1 C3
Fr Fr
X Y X Y Internal clearance code
Lubricant groove/hole code
1 Y1 0.67 Y2
Bore shape code : K, no code
Static equivalent radial load Bearing type code : EA, EM
Por = Fr + Yo Fa Inside diameter
e , Y1 , Y2 and Yo are obtained from the tables Bearing series (type code + width series code + diameter series code.)
below.

Part Number Installation Dimensions Constant Axial Load Coefficient Weight (Ref.)

kg
Cylindrical Tapered
Cylindrical Bore Tapered Bore ➀
d1 da min Da max D1 ras max e Y1 Y2 YO Bore Bore
22205EAW33 22205EAKW33 30 30 46 46 1 0.34 2.00 2.98 1.96 0.173 0.169
22205EMW33 22205EMKW33 30 30 46 46 1 0.34 2.00 2.98 1.96 0.174 0.171
22206EAW33 22206EAKW33 37 36 56 55 1 0.31 2.15 3.20 2.10 0.278 0.272
22206EMW33 22206EMKW33 37 36 56 55 1 0.31 2.15 3.20 2.10 0.281 0.275
22207EAW33 22207EAKW33 45 42 65 63 1.1 0.31 2.21 3.29 2.16 0.438 0.430
22207EMW33 22207EMKW33 45 42 65 63 1.1 0.31 2.21 3.29 2.16 0.442 0.433
22208EAD1 22208EAKD1 50 47 73 71 1.1 0.27 2.47 3.67 2.41 0.528 0.518
22208EMD1 22208EMKD1 50 47 73 71 1.1 0.27 2.47 3.67 2.41 0.529 0.519
22308EAD1 22308EAKD1 52 49 81 78 1.5 0.36 1.87 2.79 1.83 1.02 1.00
22308EMD1 22308EMKD1 52 49 81 78 1.5 0.36 1.87 2.79 1.83 1.03 1.01
22209EAD1 22209EAKD1 54 52 78 76 1.1 0.26 2.64 3.93 2.58 0.572 0.561
22209EMD1 22209EMKD1 54 52 78 76 1.1 0.26 2.64 3.93 2.58 0.577 0.566
22309EAD1 22309EAKD1 58 54 91 87 1.5 0.36 1.90 2.83 1.86 1.37 1.34
22309EMD1 22309EMKD1 58 54 91 87 1.5 0.36 1.90 2.83 1.86 1.38 1.35
22210EAD1 22210EAKD1 59 57 83 81 1.1 0.24 2.84 4.23 2.78 0.614 0.602
22210EMD1 22210EMKD1 59 57 83 81 1.1 0.24 2.84 4.23 2.78 0.616 0.604
22310EAD1 22310EAKD1 63 61 99 95 2 0.36 1.87 2.79 1.83 1.82 1.79
22310EMD1 22310EMKD1 63 61 99 95 2 0.36 1.87 2.79 1.83 1.84 1.80
22211EAD1 22211EAKD1 66 64 91 90 1.5 0.23 2.95 4.40 2.89 0.830 0.814
22211EMD1 22211EMKD1 66 64 91 90 1.5 0.23 2.95 4.40 2.89 0.827 0.811
22311EAD1 22311EAKD1 68 66 109 104 2 0.36 1.87 2.79 1.83 2.31 2.26
22311EMD1 22311EMKD1 68 66 109 104 2 0.36 1.87 2.79 1.83 2.34 2.29
22212EAD1 22212EAKD1 71 69 101 99 1.5 0.24 2.84 4.23 2.78 1.14 1.12
22212EMD1 22212EMKD1 71 69 101 99 1.5 0.24 2.84 4.23 2.78 1.15 1.13
22312EAD1 22312EAKD1 75 72 118 113 2.1 0.35 1.95 2.90 1.91 2.86 2.80
22312EMD1 22312EMKD1 75 72 118 113 2.1 0.35 1.95 2.90 1.91 2.91 2.85
22213EAD1 22213EAKD1 78 74 111 107 1.5 0.24 2.79 4.15 2.73 1.52 1.49
22213EMD1 22213EMKD1 78 74 111 107 1.5 0.24 2.79 4.15 2.73 1.53 1.50
22313EAD1 22313EAKD1 81 77 128 122 2.1 0.33 2.06 3.06 2.01 3.48 3.41
22313EMD1 22313EMKD1 81 77 128 122 2.1 0.33 2.06 3.06 2.01 3.50 3.43
22214EAD1 22214EAKD1 84 79 116 113 1.5 0.22 3.01 4.48 2.94 1.61 1.58
22214EMD1 22214EMKD1 84 79 116 113 1.5 0.22 3.01 4.48 2.94 1.64 1.60
22314EAD1 22314EAKD1 85 82 138 131 2.1 0.34 2.00 2.98 1.96 4.25 4.16
22314EMD1 22314EMKD1 85 82 138 131 2.1 0.34 2.00 2.98 1.96 4.31 4.22
22215EAD1 22215EAKD1 88 84 121 118 1.5 0.22 3.14 4.67 3.07 1.67 1.64
22215EMD1 22215EMKD1 88 84 121 118 1.5 0.22 3.14 4.67 3.07 1.71 1.67
22315EAD1 22315EAKD1 91 87 148 139 2.1 0.34 2.00 2.98 1.96 5.18 5.07
22315EMD1 22315EMKD1 91 87 148 139 2.1 0.34 2.00 2.98 1.96 5.27 5.16
22216EAD1 22216EAKD1 94 91 129 127 2 0.22 3.14 4.67 3.07 2.09 2.05
22216EMD1 22216EMKD1 94 91 129 127 2 0.22 3.14 4.67 3.07 2.11 2.07
22316EAD1 22316EAKD1 98 92 158 148 2.1 0.34 2.00 2.98 1.96 6.12 5.99
22316EMD1 22316EMKD1 98 92 158 148 2.1 0.34 2.00 2.98 1.96 6.28 6.15
22217EAD1 22217EAKD1 100 96 139 137 2 0.22 3.07 4.57 3.00 2.59 2.54
22217EMD1 22217EMKD1 100 96 139 137 2 0.22 3.07 4.57 3.00 2.67 2.62
22317EAD1 22317EAKD1 107 99 166 157 3 0.32 2.09 3.11 2.04 7.18 7.04
22317EMD1 22317EMKD1 107 99 166 157 3 0.32 2.09 3.11 2.04 7.29 7.15

22
 Size Charts

ULTAGE Series Spherical Roller Bearings [Type EA, Type EM]

B B
WO WO
dO dO
r r

r r

φD φD1 φd φd1 φD φD1 φd φd1 φd φDa

Cylindrical bore (Type EM) Cylindrical bore (Type EA) Tapered bore (Type EA)

Basic Dynamic Basic Static Basic Dynamic Basic Static

Basic Dimensions Permitted Rotational Speed
Load Rating Load Rating Load Rating Load Rating
mm kN kgf min-1
Grease Oil
d D B r s min ➁
Wo do Cr Cor Cr Cor Lubrication Lubrication
160 40 2 10 4.5 384 398 39 200 40 600 3 200 4 000
160 40 2 10 4.5 384 398 39 200 40 600 3 200 4 000
90 160 52.4 2 9 4 467 513 47 700 52 300 2 600 3 200
190 64 3 12 5 668 652 68 100 66 400 2 500 3 000
190 64 3 12 5 668 652 68 100 66 400 2 500 3 000
170 43 2.1 10 4.5 416 417 42 400 42 600 3 000 3 800
170 43 2.1 10 4.5 416 417 42 400 42 600 3 000 3 800
95
200 67 3 12 6 732 751 74 600 76 500 2 300 2 800
200 67 3 12 6 732 751 74 600 76 500 2 300 2 800
165 52 2 8 4 464 563 47 300 57 400 2 400 3 000
165 52 2 8 4 480 590 49 000 60 100 2 400 3 000
180 46 2.1 11 5 472 495 48 100 50 500 2 800 3 600
100 180 46 2.1 11 5 472 495 48 100 50 500 2 800 3 600
180 60.3 2.1 9 4.5 586 661 59 800 67 400 2 300 2 900
215 73 3 13 6 827 844 84 300 86 100 2 100 2 600
215 73 3 13 6 827 844 84 300 86 100 2 100 2 600
170 45 2 8 3.5 417 517 42 500 52 700 2 600 3 300
170 45 2 8 3.5 417 517 42 500 52 700 2 600 3 300
180 56 2 9 4 547 669 55 800 68 200 2 200 2 800
180 56 2 9 4 547 669 55 800 68 200 2 200 2 800
180 69 2 8 4 622 769 63 400 78 400 2 200 2 700
110
200 53 2.1 12 6 602 643 61 400 65 600 2 600 3 300
200 53 2.1 12 6 602 643 61 400 65 600 2 600 3 300
200 69.8 2.1 11 5 752 869 76 700 88 600 2 100 2 600
240 80 3 16 7 975 972 99 500 99 100 2 000 2 400
240 80 3 16 7 975 972 99 500 99 100 2 000 2 400
180 46 2 8 3.5 446 577 45 500 58 900 2 400 3 100
180 46 2 8 3.5 446 577 45 500 58 900 2 400 3 100
180 60 2 8 3.5 526 726 53 700 74 100 2 100 2 600
200 62 2 10 4.5 663 820 67 600 83 600 2 000 2 500
200 62 2 10 4.5 663 820 67 600 83 600 2 000 2 500
120 200 80 2 10 4.5 756 991 77 100 101 000 1 900 2 500
215 58 2.1 12 6 688 753 70 100 76 800 2 400 3 000
215 58 2.1 12 6 688 753 70 100 76 800 2 400 3 000
215 76 2.1 11 5 857 998 87 300 102 000 1 900 2 400
260 86 3 18 8 1 170 1 280 119 000 131 000 1 800 2 200
260 86 3 18 8 1 170 1 280 119 000 131 000 1 800 2 200
200 52 2 9 4 565 721 57 600 73 500 2 200 2 900
200 52 2 9 4 565 721 57 600 73 500 2 200 2 900
200 69 2 9 4 682 936 69 600 95 400 1 900 2 400
210 64 2 10 4.5 710 906 72 400 92 400 1 900 2 400
210 64 2 10 4.5 710 906 72 400 92 400 1 900 2 400
130 210 80 2 10 4.5 803 1 080 81 900 110 000 1 800 2 400
230 64 3 13 6 808 898 82 400 91 600 2 200 2 800
230 64 3 13 6 808 898 82 400 91 600 2 200 2 800
230 80 3 12 5 958 1 130 97 700 115 000 1 700 2 300
280 93 4 19 9 1 330 1 400 135 000 143 000 1 600 2 000
280 93 4 19 9 1 330 1 400 135 000 143 000 1 600 2 000
➀ Items marked ‘K’ indicate bearings with a bore taper ratio of 1/12, and items marked ‘K30’ indicate bearings with a bore taper ratio of 1/30. ➁ Indicates the minimum allowed chamfer dimension r.
23
 Products for Paper Manufacturing Machinery

B Dynamic equivalent radial load

Pr = XFr + YFa
r r ra Fa Fa
ra
　　≦ e 　　> e
Fr Fr

ra X Y X Y
ra
1 Y1 0.67 Y2

Static equivalent radial load

Por = Fr + Yo Fa
φd φφdd1 φd1 φd φd φDa φDa φda φda
e , Y1 , Y2 and Yo are obtained from the tables
Type (Type
bore EA) EA) Tapered bore (Type
Tapered EA) EA)
bore (Type
below.

Part Number Installation Dimensions Constant Axial Load Coefficient Weight (Ref.)

kg
Cylindrical Tapered
Cylindrical Bore Tapered Bore➀ d1 da min Da max D1 ras max e Y1 Y2 YO Bore Bore
22218EAD1 22218EAKD1 105 101 149 144 2 0.23 2.90 4.31 2.83 3.34 3.27
22218EMD1 22218EMKD1 105 101 149 144 2 0.23 2.90 4.31 2.83 3.43 3.37
23218EMD1 23218EMKD1 104 101 149 141 2 0.30 2.25 3.34 2.20 4.43 4.31
22318EAD1 22318EAKD1 110 104 176 166 3 0.33 2.06 3.06 2.01 8.42 8.25
22318EMD1 22318EMKD1 110 104 176 166 3 0.33 2.06 3.06 2.01 8.53 8.35
22219EAD1 22219EAKD1 110 107 158 153 2.1 0.23 2.95 4.40 2.89 3.98 3.90
22219EMD1 22219EMKD1 110 107 158 153 2.1 0.23 2.95 4.40 2.89 4.06 3.98
22319EAD1 22319EAKD1 120 109 186 174 3 0.32 2.09 3.11 2.04 9.91 9.71
22319EMD1 22319EMKD1 120 109 186 174 3 0.32 2.09 3.11 2.04 10.0 9.82
23120EAD1 23120EAKD1 114 111 154 147 2 0.28 2.39 3.56 2.34 4.37 4.24
23120EMD1 23120EMKD1 114 111 154 147 2 0.28 2.39 3.56 2.34 4.45 4.32
22220EAD1 22220EAKD1 118 112 168 161 2.1 0.24 2.84 4.23 2.78 4.90 4.80
22220EMD1 22220EMKD1 118 112 168 161 2.1 0.24 2.84 4.23 2.78 5.02 4.93
23220EMD1 23220EMKD1 118 112 168 159 2.1 0.31 2.18 3.24 2.13 6.51 6.33
22320EAD1 22320EAKD1 127 114 201 187 3 0.34 1.98 2.94 1.93 12.6 12.3
22320EMD1 22320EMKD1 127 114 201 187 3 0.34 1.98 2.94 1.93 12.9 12.7
23022EAD1 23022EAKD1 123 119 161 155 2 0.23 2.95 4.40 2.89 3.66 3.55
23022EMD1 23022EMKD1 123 119 161 155 2 0.23 2.95 4.40 2.89 3.66 3.55
23122EAD1 23122EAKD1 125 121 169 161 2 0.28 2.43 3.61 2.37 5.66 5.49
23122EMD1 23122EMKD1 125 121 169 161 2 0.28 2.43 3.61 2.37 5.53 5.36
24122EMD1 24122EMK30D1 121 121 169 158 2 0.36 1.90 2.83 1.86 6.75 6.65
22222EAD1 22222EAKD1 130 122 188 179 2.1 0.25 2.69 4.00 2.63 7.10 6.95
22222EMD1 22222EMKD1 130 122 188 179 2.1 0.25 2.69 4.00 2.63 7.30 7.15
23222EMD1 23222EMKD1 130 122 188 176 2.1 0.32 2.12 3.15 2.07 9.41 9.14
22322EAD1 22322EAKD1 139 124 226 209 3 0.32 2.09 3.11 2.04 17.0 16.6
22322EMD1 22322EMKD1 139 124 226 209 3 0.32 2.09 3.11 2.04 17.4 17.1
23024EAD1 23024EAKD1 134 129 171 165 2 0.22 3.14 4.67 3.07 4.02 3.90
23024EMD1 23024EMKD1 134 129 171 165 2 0.22 3.14 4.67 3.07 4.02 3.90
24024EMD1 24024EMK30D1 132 129 171 161 2 0.29 2.32 3.45 2.26 5.28 5.21
23124EAD1 23124EAKD1 138 131 189 179 2 0.28 2.43 3.61 2.37 7.72 7.49
23124EMD1 23124EMKD1 138 131 189 179 2 0.28 2.43 3.61 2.37 7.77 7.54
24124EMD1 24124EMK30D1 136 131 189 173 2 0.37 1.84 2.74 1.80 10.0 9.87
22224EAD1 22224EAKD1 141 132 203 193 2.1 0.25 2.74 4.08 2.68 8.88 8.68
22224EMD1 22224EMKD1 141 132 203 193 2.1 0.25 2.74 4.08 2.68 9.01 8.82
23224EMD1 23224EMKD1 139 132 203 190 2.1 0.32 2.09 3.11 2.04 11.7 11.3
22324EAD1 22324EAKD1 156 134 246 225 3 0.32 2.09 3.11 2.04 22.3 21.9
22324EMD1 22324EMKD1 156 134 246 225 3 0.32 2.09 3.11 2.04 22.7 22.2
23026EAD1 23026EAKD1 145 139 191 183 2 0.22 3.01 4.48 2.94 5.88 5.71
23026EMD1 23026EMKD1 145 139 191 183 2 0.22 3.01 4.48 2.94 5.90 5.73
24026EMD1 24026EMK30D1 143 139 191 178 2 0.31 2.20 3.27 2.15 7.82 7.71
23126EAD1 23126EAKD1 148 141 199 189 2 0.27 2.51 3.74 2.45 8.45 8.19
23126EMD1 23126EMKD1 148 141 199 189 2 0.27 2.51 3.74 2.45 8.51 8.25
24126EMD1 24126EMK30D1 146 141 199 183 2 0.34 1.96 2.92 1.92 10.7 10.5
22226EAD1 22226EAKD1 151 144 216 206 3 0.25 2.69 4.00 2.63 11.0 10.7
22226EMD1 22226EMKD1 151 144 216 206 3 0.25 2.69 4.00 2.63 11.1 10.9
23226EMD1 23226EMKD1 150 144 216 203 3 0.32 2.12 3.15 2.07 13.8 13.4
22326EAD1 22326EAKD1 164 147 263 243 4 0.33 2.06 3.06 2.01 27.2 26.6
22326EMD1 22326EMKD1 164 147 263 243 4 0.33 2.06 3.06 2.01 28.0 27.5

24
 Size Charts

ULTAGE Series Spherical Roller Bearings [Type EA, Type EM]

B B
WO WO
dO dO
r r

r r

φ D φ D1 φ d φ d1 φ D φ D1 φ d φ d1 φd φ Da
Cylindrical bore (Type EM) Cylindrical bore (Type EA) Tapered bore (Type EA)

Basic Dynamic Basic Static Basic Dynamic Basic Static

Basic Dimensions Permitted Rotational Speed
Load Rating Load Rating Load Rating Load Rating
mm kN kgf min-1
Grease Oil
d D B r s min ➁
Wo do Cr Cor Cr Cor Lubrication Lubrication
210 53 2 9 4 597 783 60 900 79 800 2 100 2 700
210 53 2 9 4 597 783 60 900 79 800 2 100 2 700
210 69 2 9 4 709 990 72 300 101 000 1 800 2 200
225 68 2.1 11 5 802 1 030 81 800 105 000 1 800 2 200
225 68 2.1 11 5 802 1 030 81 800 105 000 1 800 2 200
140 225 85 2.1 10 4.5 951 1 280 97 000 130 000 1 700 2 200
250 68 3 14 7 912 1 010 93 000 103 000 2 000 2 500
250 68 3 14 7 912 1 010 93 000 103 000 2 000 2 500
250 88 3 13 6 1 140 1 370 116 000 139 000 1 600 2 100
300 102 4 19 9 1 540 1 720 157 000 175 000 1 500 1 900
300 102 4 19 9 1 540 1 720 157 000 175 000 1 500 1 900
225 56 2.1 10 4.5 660 893 67 300 91 100 2 000 2 500
225 56 2.1 10 4.5 660 893 67 300 91 100 2 000 2 500
225 75 2.1 10 4.5 789 1 140 80 400 116 000 1 700 2 100
250 80 2.1 13 6 1 060 1 350 108 000 138 000 1 600 2 000
250 80 2.1 13 6 1 060 1 350 108 000 138 000 1 600 2 000
150
250 100 2.1 12 6 1 180 1 590 121 000 162 000 1 600 2 000
270 73 3 15 7 1 080 1 220 110 000 124 000 1 800 2 300
270 73 3 15 7 1 080 1 220 110 000 124 000 1 800 2 300
270 96 3 14 6 1 340 1 620 137 000 165 000 1 500 1 900
320 108 4 20 9 1 740 1 890 178 000 193 000 1 400 1 700
220 45 2 9 4 455 683 46 400 69 600 1 900 2 400
240 60 2.1 11 5 748 1 000 76 300 102 000 1 800 2 300
240 60 2.1 11 5 748 1 000 76 300 102 000 1 800 2 300
240 80 2.1 10 5 901 1 290 91 900 132 000 1 600 2 000
270 86 2.1 14 6 1 220 1 580 124 000 162 000 1 500 1 900
160 270 86 2.1 14 6 1 220 1 580 124 000 162 000 1 500 1 900
270 109 2.1 14 6 1 360 1 860 139 000 190 000 1 500 1 800
290 80 3 17 8 1 220 1 390 124 000 142 000 1 700 2 100
290 80 3 17 8 1 220 1 390 124 000 142 000 1 700 2 100
290 104 3 15 7 1 550 1 890 158 000 193 000 1 400 1 800
340 114 4 20 10 1 950 2 210 199 000 226 000 1 300 1 600
230 45 2 9 4.5 468 723 47 700 73 700 1 800 2 300
260 67 2.1 12 5 914 1 240 93 200 127 000 1 700 2 200
260 67 2.1 12 5 914 1 240 93 200 127 000 1 700 2 200
260 90 2.1 11 5 1 100 1 600 112 000 163 000 1 500 1 900
280 88 2.1 14 6 1 270 1 700 129 000 173 000 1 400 1 800
170
280 88 2.1 14 6 1 270 1 700 129 000 173 000 1 400 1 800
280 109 2.1 14 6 1 410 1 990 144 000 203 000 1 400 1 700
310 86 4 18 8 1 400 1 610 143 000 164 000 1 600 2 000
310 110 4 16 8 1 700 2 070 173 000 211 000 1 300 1 700
360 120 4 20 10 2 200 2 630 225 000 268 000 1 200 1 500

➀ Items marked ‘K’ indicate bearings with a bore taper ratio of 1/12, and items marked ‘K30’ indicate bearings with a bore taper ratio of 1/30. ➁ Indicates the minimum allowed chamfer dimension r.

25
 Products for Paper Manufacturing Machinery

Dynamic equivalent radial load

Pr = XFr + YFa
r r ra ra Fa Fa
　　 ≦ e 　　 > e
Fr Fr

ra ra X Y X Y

1 Y1 0.67 Y2

Static equivalent radial load

Por = Fr + Yo Fa
φ d φ d1φ d1 φdφd φ Daφ Da φ daφ da
e , Y1 , Y2 and Yo are obtained from the tables
epe(Type
EA) EA) Tapered
Tapered
borebore
(Type(Type
EA) EA)
below.

Part Number Installation Dimensions Constant Axial Load Coefficient Weight (Ref.)

kg
Cylindrical Tapered
Cylindrical Bore Tapered Bore➀ d1 da min Da max D1 ras max e Y1 Y2 YO Bore Bore
23028EAD1 23028EAKD1 155 149 201 193 2 0.22 3.14 4.67 3.07 6.32 6.13
23028EMD1 23028EMKD1 155 149 201 193 2 0.22 3.14 4.67 3.07 6.37 6.18
24028EMD1 24028EMK30D1 153 149 201 188 2 0.28 2.37 3.53 2.32 8.27 8.15
23128EAD1 23128EAKD1 159 152 213 203 2.1 0.26 2.55 3.80 2.50 10.3 9.94
23128EMD1 23128EMKD1 159 152 213 203 2.1 0.26 2.55 3.80 2.50 10.3 10.0
24128EMD1 24128EMK30D1 156 152 213 198 2.1 0.34 1.98 2.94 1.93 12.9 12.8
22228EAD1 22228EAKD1 163 154 236 224 3 0.25 2.74 4.08 2.68 13.9 13.6
22228EMD1 22228EMKD1 163 154 236 224 3 0.25 2.74 4.08 2.68 14.2 13.9
23228EMD1 23228EMKD1 162 154 236 220 3 0.33 2.06 3.06 2.01 18.2 17.7
22328EAD1 22328EAKD1 181 157 283 261 4 0.33 2.03 3.02 1.98 34.4 33.7
22328EMD1 22328EMKD1 181 157 283 261 4 0.33 2.03 3.02 1.98 35.4 34.7
23030EAD1 23030EAKD1 167 161 214 207 2.1 0.21 3.20 4.77 3.13 7.68 7.45
23030EMD1 23030EMKD1 167 161 214 207 2.1 0.21 3.20 4.77 3.13 7.73 7.50
24030EMD1 24030EMK30D1 165 161 214 202 2.1 0.29 2.32 3.45 2.26 10.4 10.3
23130EAD1 23130EAKD1 171 162 238 223 2.1 0.29 2.35 3.50 2.30 15.7 15.2
23130EMD1 23130EMKD1 171 162 238 223 2.1 0.29 2.35 3.50 2.30 15.8 15.3
24130EMD1 24130EMK30D1 168 162 238 216 2.1 0.36 1.85 2.76 1.81 19.7 19.4
22230EAD1 22230EAKD1 177 164 256 242 3 0.25 2.74 4.08 2.68 17.6 17.3
22230EMD1 22230EMKD1 177 164 256 242 3 0.25 2.74 4.08 2.68 18.0 17.7
23230EMD1 23230EMKD1 174 164 256 237 3 0.33 2.03 3.02 1.98 23.6 22.9
22330EMD1 22330EMKD1 188 167 303 279 4 0.34 2.00 2.98 1.96 42.2 41.3
23932EMD1 23932EMKD1 175 169 211 205 2 0.17 3.90 5.81 3.81 5.09 4.94
23032EAD1 23032EAKD1 177 171 229 221 2.1 0.21 3.20 4.77 3.13 9.32 9.03
23032EMD1 23032EMKD1 177 171 229 221 2.1 0.21 3.20 4.77 3.13 9.37 9.09
24032EMD1 24032EMK30D1 175 171 229 215 2.1 0.29 2.32 3.45 2.26 12.6 12.4
23132EAD1 23132EAKD1 185 172 258 240 2.1 0.29 2.35 3.50 2.30 20.1 19.5
23132EMD1 23132EMKD1 185 172 258 240 2.1 0.29 2.35 3.50 2.30 20.2 19.6
24132EMD1 24132EMK30D1 181 172 258 232 2.1 0.37 1.83 2.72 1.79 25.4 25.1
22232EAD1 22232EAKD1 190 174 276 260 3 0.25 2.69 4.00 2.63 22.3 21.8
22232EMD1 22232EMKD1 190 174 276 260 3 0.25 2.69 4.00 2.63 22.9 22.4
23232EMD1 23232EMKD1 187 174 276 254 3 0.33 2.03 3.02 1.98 29.6 28.8
22332EMD1 22332EMKD1 205 177 323 296 4 0.33 2.03 3.02 1.98 50.5 49.5
23934EMD1 23934EMKD1 185 179 221 215 2 0.16 4.11 6.12 4.02 5.39 5.23
23034EAD1 23034EAKD1 190 181 249 238 2.1 0.22 3.07 4.57 3.00 12.7 12.3
23034EMD1 23034EMKD1 190 181 249 238 2.1 0.22 3.07 4.57 3.00 12.8 12.4
24034EMD1 24034EMK30D1 186 181 249 231 2.1 0.30 2.23 3.32 2.18 17.2 16.9
23134EAD1 23134EAKD1 195 182 268 250 2.1 0.28 2.39 3.56 2.34 21.5 20.9
23134EMD1 23134EMKD1 195 182 268 250 2.1 0.28 2.39 3.56 2.34 21.6 20.9
24134EMD1 24134EMK30D1 193 182 268 243 2.1 0.35 1.91 2.85 1.87 26.7 26.3
22234EMD1 22234EMKD1 201 187 293 277 4 0.26 2.60 3.87 2.54 28.3 27.7
23234EMD1 23234EMKD1 199 187 293 272 4 0.33 2.03 3.02 1.98 35.8 34.8
22334EMD1 22334EMKD1 223 187 343 313 4 0.32 2.09 3.11 2.04 60.3 59.1

26
 Size Charts

ULTAGE Series Spherical Roller Bearings [Type EA, Type EM]

B B
WO WO
dO dO
r r

r r

φ D φ D1 φ d φ d1 φ D φ D1 φ d φ d1 φd φ Da
Cylindrical bore (Type EM) Cylindrical bore (Type EA) Tapered bore (Type EA)

Basic Dynamic Basic Static Basic Dynamic Basic Static

Basic Dimensions Permitted Rotational Speed
Load Rating Load Rating Load Rating Load Rating
mm kN kgf min-1
Grease Oil
d D B r s min ➁
Wo do Cr Cor Cr Cor Lubrication Lubrication
250 52 2 10 5 573 869 58 400 88 600 1 700 2 100
280 74 2.1 13 6 1 080 1 450 110 000 148 000 1 600 2 000
280 74 2.1 13 6 1 080 1 450 110 000 148 000 1 600 2 000
280 100 2.1 13 6 1 310 1 880 133 000 192 000 1 400 1 800
300 96 3 15 7 1 490 1 960 152 000 200 000 1 300 1 700
180
300 96 3 15 7 1 490 1 960 152 000 200 000 1 300 1 700
300 118 3 15 7 1 660 2 290 169 000 233 000 1 300 1 600
320 86 4 18 8 1 450 1 660 148 000 169 000 1 500 1 900
320 112 4 16 8 1 800 2 270 183 000 231 000 1 200 1 600
380 126 4 21 10 2 420 2 810 247 000 286 000 1 100 1 400
260 52 2 10 5 603 935 61 500 95 400 1 600 2 000
290 75 2.1 13 6 1 140 1 570 116 000 160 000 1 500 1 900
290 75 2.1 13 6 1 140 1 570 116 000 160 000 1 500 1 900
290 100 2.1 13 6 1 360 2 000 138 000 204 000 1 300 1 700
190 320 104 3 17 8 1 670 2 250 170 000 230 000 1 200 1 600
320 128 3 16 8 1 900 2 700 194 000 275 000 1 200 1 500
340 92 4 20 9 1 620 1 870 165 000 191 000 1 400 1 800
340 120 4 18 8 1 990 2 480 203 000 253 000 1 200 1 500
400 132 5 21 10 2 600 3 120 265 000 318 000 1 000 1 300
280 60 2.1 12 6 766 1 190 78 100 121 000 1 500 1 900
310 82 2.1 15 7 1 310 1 790 134 000 182 000 1 400 1 800
310 109 2.1 14 7 1 570 2 280 160 000 233 000 1 200 1 600
340 112 3 18 8 1 890 2 510 192 000 256 000 1 100 1 400
200
340 140 3 17 8 2 130 2 930 218 000 299 000 1 100 1 400
360 98 4 20 10 1 810 2 100 184 000 214 000 1 400 1 700
360 128 4 19 9 2 250 2 840 230 000 290 000 1 100 1 300
420 138 5 21 10 2 830 3 530 289 000 360 000 950 1 200
300 60 2.1 12 6 789 1 260 80 500 128 000 1 400 1 700
340 90 3 15 7 1 530 2 110 156 000 215 000 1 300 1 600
340 118 3 15 7 1 850 2 720 189 000 278 000 1 100 1 400
220 370 120 4 19 9 2 190 2 940 223 000 300 000 1 000 1 300
370 150 4 19 9 2 540 3 620 259 000 369 000 1 000 1 300
400 108 4 21 11 2 210 2 690 225 000 274 000 1 200 1 500
400 144 4 20 10 2 890 3 830 295 000 391 000 1 000 1 200
320 60 2.1 12 6 815 1 350 83 100 138 000 1 300 1 600
360 92 3 16 8 1 630 2 350 166 000 240 000 1 100 1 400
240 360 118 3 16 8 1 940 2 980 198 000 304 000 1 000 1 300
400 128 4 20 9 2 510 3 500 256 000 357 000 960 1 200
400 160 4 19 9 2 910 4 290 297 000 438 000 960 1 200
360 75 2.1 14 7 1 130 1 940 115 000 198 000 1 100 1 400
260 400 104 4 18 8 2 060 2 910 210 000 297 000 1 000 1 300
400 140 4 18 8 2 520 3 820 257 000 390 000 960 1 200
380 75 2.1 14 7 1 180 2 050 120 000 209 000 1 000 1 300
280 420 106 4 18 8 2 170 3 150 221 000 321 000 960 1 200
420 140 4 18 8 2 620 4 060 267 000 414 000 880 1 100

➀ Items marked ‘K’ indicate bearings with a bore taper ratio of 1/12, and items marked ‘K30’ indicate bearings with a bore taper ratio of 1/30. ➁ Indicates the minimum allowed chamfer dimension r.

27
 Products for Paper Manufacturing Machinery

Dynamic equivalent radial load

Pr = XFr + YFa
r r
ra ra Fa Fa
　　 ≦ e 　　 > e
Fr Fr

ra ra X Y X Y

1 Y1 0.67 Y2

Static equivalent radial load

Por = Fr + Yo Fa
φ d φ d1φ d1 φdφd φ Daφ Da φ daφ da
e , Y1 , Y2 and Yo are obtained from the tables
ype EA)
EA) Tapered
Tapered borebore
(Type(Type
EA) EA)
below.

Part Number Installation Dimensions Constant Axial Load Coefficient Weight (Ref.)

kg
Cylindrical Tapered
Cylindrical Bore Tapered Bore➀ d1 da min Da max D1 r as max e Y1 Y2 YO Bore Bore
23936EMD1 23936EMKD1 199 189 241 232 2 0.17 3.90 5.81 3.81 7.79 7.56
23036EAD1 23036EAKD1 201 191 269 255 2.1 0.23 2.95 4.40 2.89 16.8 16.3
23036EMD1 23036EMKD1 201 191 269 255 2.1 0.23 2.95 4.40 2.89 16.9 16.4
24036EMD1 24036EMK30D1 199 191 269 248 2.1 0.31 2.15 3.20 2.10 22.8 22.4
23136EAD1 23136EAKD1 205 194 286 267 3 0.29 2.32 3.45 2.26 27.2 26.4
23136EMD1 23136EMKD1 205 194 286 267 3 0.29 2.32 3.45 2.26 27.4 26.5
24136EMD1 24136EMK30D1 202 194 286 259 3 0.36 1.87 2.79 1.83 33.5 33.0
22236EMD1 22236EMKD1 209 197 303 287 4 0.25 2.74 4.08 2.68 29.3 28.7
23236EMD1 23236EMKD1 210 197 303 282 4 0.33 2.06 3.06 2.01 38.2 37.1
22336EMD1 22336EMKD1 229 197 363 329 4 0.32 2.09 3.11 2.04 70.2 68.7
23938EMD1 23938EMKD1 209 199 251 243 2 0.17 4.05 6.04 3.96 8.20 7.96
23038EAD1 23038EAKD1 213 201 279 266 2.1 0.22 3.01 4.48 2.94 17.8 17.3
23038EMD1 23038EMKD1 213 201 279 266 2.1 0.22 3.01 4.48 2.94 17.9 17.4
24038EMD1 24038EMK30D1 209 201 279 258 2.1 0.30 2.23 3.32 2.18 23.8 23.4
23138EMD1 23138EMKD1 221 204 306 284 3 0.29 2.32 3.45 2.26 34.3 33.2
24138EMD1 24138EMK30D1 216 204 306 275 3 0.37 1.84 2.74 1.80 42.1 41.5
22238EMD1 22238EMKD1 222 207 323 305 4 0.25 2.74 4.08 2.68 35.6 34.9
23238EMD1 23238EMKD1 220 207 323 299 4 0.33 2.03 3.02 1.98 46.1 44.7
22338EMD1 22338EMKD1 247 210 380 346 5 0.32 2.12 3.15 2.07 81.5 79.9
23940EMD1 23940EMKD1 221 211 269 260 2.1 0.18 3.76 5.59 3.67 12.0 11.6
23040EMD1 23040EMKD1 223 211 299 283 2.1 0.23 2.95 4.40 2.89 22.8 22.1
24040EMD1 24040EMK30D1 221 211 299 275 2.1 0.31 2.18 3.24 2.13 30.2 29.7
23140EMD1 23140EMKD1 231 214 326 301 3 0.30 2.25 3.34 2.20 41.9 40.6
24140EMD1 24140EMK30D1 224 214 326 291 3 0.39 1.74 2.59 1.70 51.5 50.7
22240EMD1 22240EMKD1 234 217 343 323 4 0.25 2.74 4.08 2.68 42.7 41.8
23240EMD1 23240EMKD1 232 217 343 315 4 0.34 1.98 2.94 1.93 55.2 53.6
22340EMD1 22340EMKD1 265 220 400 364 5 0.31 2.15 3.20 2.10 94.6 92.7
23944EMD1 23944EMKD1 241 231 289 280 2.1 0.17 4.05 6.04 3.96 12.5 12.1
23044EMD1 23044EMKD1 246 233 327 310 3 0.23 2.95 4.40 2.89 29.9 29.1
24044EMD1 24044EMK30D1 243 233 327 302 3 0.31 2.20 3.27 2.15 39.2 38.6
23144EMD1 23144EMKD1 252 237 353 328 4 0.30 2.28 3.39 2.23 52.3 50.7
24144EMD1 24144EMK30D1 247 237 353 317 4 0.38 1.78 2.65 1.74 65.2 64.3
22244EMD1 22244EMKD1 264 237 383 358 4 0.25 2.74 4.08 2.68 59.6 58.4
23244EMD1 23244EMKD1 261 237 383 349 4 0.34 2.00 2.98 1.96 79.4 77.1
23948EMD1 23948EMKD1 262 251 309 301 2.1 0.15 4.40 6.56 4.31 13.5 13.1
23048EMD1 23048EMKD1 267 253 347 329 3 0.22 3.07 4.57 3.00 32.0 31.7
24048EMD1 24048EMK30D1 264 253 347 322 3 0.28 2.37 3.53 2.32 42.2 41.6
23148EMD1 23148EMKD1 276 257 383 356 4 0.29 2.32 3.45 2.26 65.1 63.1
24148EMD1 24148EMK30D1 270 257 383 344 4 0.37 1.82 2.70 1.78 81.0 79.8
23952EMD1 23952EMKD1 292 271 349 335 2.1 0.17 3.90 5.81 3.81 23.9 23.1
23052EMD1 23052EMKD1 291 275 385 366 4 0.23 2.95 4.40 2.89 47.8 46.3
24052EMD1 24052EMK30D1 286 275 385 354 4 0.31 2.16 3.22 2.12 63.6 62.6
23956EMD1 23956EMKD1 310 291 369 356 2.1 0.16 4.16 6.20 4.07 25.2 24.4
23056EMD1 23056EMKD1 310 295 405 386 4 0.22 3.07 4.57 3.00 51.3 49.7
24056EMD1 24056EMK30D1 306 295 405 376 4 0.29 2.30 3.42 2.25 67.3 66.3

28
 Size Charts

ULTAGE Series Sealed Spherical Roller Bearings [Type WA]

Bearing Number

WA 222 20 EA LLS K D1 C3
Internal clearance code
Internal clearance code – D1 : oil groove w/oil hole (Japan manufacturing spec.) ;
W33 : oil groove w/oil hole (Europe manufacturing spec.)
Bore shape code – no code : inside diameter cylindrical bore ;
K : tapered bore
Dual-side contact seal
Bearing type code – EA : pressed steel pocket-type retainer
Inside diameter
Bearing series (type code + width series code + diameter series code.)
Bearings with width dimensions different to standard sizes

Basic Basic Basic Basic

Basic Dimensions Dynamic Static Dynamic Static Part Number
Load Rating Load Rating Load Rating Load Rating
mm kN kgf

d D B r s min ➁
Wo do Cr Cor Cr Cor Cylindrical Bore Tapered Bore➀

25 52 23 1 3 1.5 57.3 46.1 5 840 4 700 WA22205EALLSW33 —

30 62 25 1 4 2 75.7 64.5 7 720 6 580 WA22206EALLSW33 —

35 72 28 1.1 5 2 100 92 10 200 9 380 WA22207EALLSW33 WA22207EALLSKW33

40 80 28 1.1 5 2.5 116 105 11 800 10 700 WA22208EALLSD1 WA22208EALLSKD1

45 85 28 1.1 6 2.5 121 113 12 300 11 500 WA22209EALLSD1 WA22209EALLSKD1

50 90 28 1.1 6 2.5 130 124 13 300 12 600 WA22210EALLSD1 WA22210EALLSKD1

55 100 31 1.5 6 3 155 148 15 800 15 100 WA22211EALLSD1 WA22211EALLSKD1

60 110 34 1.5 7 3 187 181 19 100 18 400 WA22212EALLSD1 WA22212EALLSKD1

65 120 38 1.5 8 3.5 226 224 23 100 22 900 WA22213EALLSD1 WA22213EALLSKD1

70 125 38 1.5 7 3.5 235 240 24 000 24 400 WA22214EALLSD1 WA22214EALLSKD1

75 130 38 1.5 7 3.5 244 249 24 800 25 400 WA22215EALLSD1 WA22215EALLSKD1

80 140 40 2 8 3.5 278 287 28 400 29 300 WA22216EALLSD1 WA22216EALLSKD1

85 150 44 2 8 3.5 324 330 33 000 33 600 WA22217EALLSD1 WA22217EALLSKD1

90 160 48 2 10 4.5 384 398 39 200 40 600 WA22218EALLSD1 WA22218EALLSKD1

100 180 55 2.1 11 5 472 495 48 100 50 500 WA22220EALLSD1 WA22220EALLSKD1

110 200 63 2.1 12 6 602 643 61 400 65 600 WA22222EALLSD1 WA22222EALLSKD1

120 215 69 2.1 12 6 688 753 70 100 76 800 WA22224EALLSD1 WA22224EALLSKD1

130 230 75 3 13 6 808 898 82 400 91 600 WA22226EALLSD1 WA22226EALLSKD1

➀ Indicates bearings with a bore taper ratio of 1/12. ➁ Indicates the minimum allowed chamfer dimension r.

Caution when handling bearings

1. Because the internal radial clearance of "ULTAGE Series Sealed 3. Please use Lithium mineral grease. In case other types of
Spherical Roller Bearings" with tapered bores cannot be grease are to be used, please consult NTN.
measured with a thickness gauge, please monitor clearances 4. If a shrink fit is to be applied, please do not exceed a bearing
by measuring the axial movement of the inner ring as shown temperature of 100˚C. However, these bearing cannot be
in Table 1. shrink fit via immersion in a hot oil bath.
2. During assembly, if misalignment exceeding the allowable
misalignment angle of ± 0.5 ˚ is applied to the bearing,
rollers may come in direct contact with seals causing seal
deformation. Furthermore, if additional force is applied under
these conditions, seals may separate from the bearing entirely.
Therefore, caution is advised.

29
 Products for Paper Manufacturing Machinery

B B Dynamic equivalent radial load

WO WO Pr = XFr + YFa
ZO × dO ZO × dO
Number of outer Fa Fa
r r
ring oil holes
ra ra 　　 ≦ e 　　 > e
Fr Fr
ZO X Y X Y
r r D1 W33 ra ra
1 Y1 0.67 Y2
4 3
Static equivalent radial load

φDa

φDa
Por = Fr + Yo Fa

φda

φda
φD1

φD1

φd1

φd1
φD

φD

φd

φd

φd

φd
e , Y1 , Y2 and Yo are obtained from
Cylindrical bore Cylindrical bore
Tapered bore Tapered bore the tables below.

Installation Dimensions Constant Axial Load Coefficient Weight (Ref.) Grease Pack Amount (Ref.)

kg g
Cylindrical Tapered
d1 da min Da max D1 r as max e Y1 Y2 YO Bore Bore
29 29 47 47 1 0.34 2.00 2.98 1.96 0.19 — 1.4 ~ 2.4

36 36 56 56 1 0.31 2.15 3.20 2.10 0.30 — 2.0 ~ 3.3

43 42 65 65 1.1 0.31 2.21 3.29 2.16 0.50 0.49 2.3 ~ 3.9

48 47 73 73 1.1 0.27 2.47 3.67 2.41 0.58 0.57 3.1 ~ 5.2

53 52 78 78 1.1 0.26 2.64 3.93 2.58 0.63 0.61 3.4 ~ 5.7

58 57 83 83 1.1 0.24 2.84 4.23 2.78 0.70 0.68 3.4 ~ 5.6

64 64 93 93 1.5 0.23 2.95 4.40 2.89 0.94 0.91 5.2 ~ 7.9

70 69 102 102 1.5 0.24 2.84 4.23 2.78 1.25 1.22 6.6 ~ 11.0

76 74 111 110 1.5 0.24 2.79 4.15 2.73 1.72 1.67 8.5 ~ 14.2

82 79 116 116 1.5 0.22 3.01 4.48 2.94 1.78 1.73 9.6 ~ 16.0

86 84 121 121 1.5 0.22 3.14 4.67 3.07 1.88 1.83 9.9 ~ 16.4

93 91 131 131 2 0.22 3.14 4.67 3.07 2.32 2.27 12.2 ~ 20.3

98 96 140 140 2 0.22 3.07 4.57 3.00 2.90 2.83 16.9 ~ 28.1

103 101 149 147 2 0.23 2.90 4.31 2.83 3.68 3.59 20.4 ~ 34.1

115 112 168 165 2.1 0.24 2.84 4.23 2.78 5.40 5.25 28.8 ~ 48.0

127 122 188 183 2.1 0.25 2.69 4.00 2.63 7.79 7.58 41.6 ~ 69.3

138 132 203 197 2.1 0.25 2.74 4.08 2.68 9.76 9.48 52.8 ~ 88.0

148 144 216 211 3 0.25 2.69 4.00 2.63 11.9 11.6 62.6 ~ 104.4

Table 1. Installation of Tapered Bore Sealed Spherical Roller Bearings Units : mm

Nominal Bearing Radial Internal Axial Displacement Minimum Residual Radial

Inside Diameter Clearance Reduction Drive-up Internal Clearance
d

Equal to or
Greater Than Min. Max. Min. Max. CN C3 C4
Less Than
24 30 0.010 0.015 0.15 0.20 0.015 0.025 0.040

30 40 0.015 0.020 0.25 0.30 0.015 0.030 0.045

40 50 0.020 0.025 0.35 0.40 0.020 0.035 0.055

50 65 0.025 0.030 0.40 0.45 0.025 0.045 0.065

65 80 0.035 0.040 0.50 0.60 0.030 0.055 0.080

80 100 0.040 0.050 0.60 0.70 0.030 0.060 0.090

100 120 0.055 0.065 0.80 0.90 0.035 0.070 0.105

120 130 0.065 0.075 0.90 1.00 0.045 0.085 0.125

30
 Size Charts

Triple-Lip Sealed Bearings for Bearing Units

Bearing Number
G C
Ca
2 × ds (120˚ )
UC 3 05 D1 LLJ

Triple-Lip seal code r

Lubricating method SφD

Inside diameter d4 d

Diameter series Triple-Lip seal

Bearing type code

S1 S
B

Basic Basic
Shaft Bearing
Part Number Dimensions Dynamic Static Coefficient
Diameter Weight
Load Rating Load Rating

mm mm kN kN kg

d D B C r s min ➀
S S1 G ds Ca d4 Cr Cor fo (Ref.)

12 UC201D1LLJ 12 47 31 17 0.6 12.7 18.3 4.5 M 5 × 0.8 3.8 29.6 12.8 6.65 13.2 0.21

15 UC202D1LLJ 15 47 31 17 0.6 12.7 18.3 4.5 M 5 × 0.8 3.8 29.6 12.8 6.65 13.2 0.20

17 UC203D1LLJ 17 47 31 17 0.6 12.7 18.3 4.5 M 5 × 0.8 3.8 29.6 12.8 6.65 13.2 0.18

20 UC204D1LLJ 20 47 31 17 1 12.7 18.3 4.5 M 5 × 0.8 3.8 29.6 12.8 6.65 13.2 0.17

25 UC205D1LLJ 25 52 34.1 17 1 14.3 19.8 5 M 5 × 0.8 4 33.9 14.0 7.85 13.9 0.20

30 UC206D1LLJ 30 62 38.1 19 1 15.9 22.2 5 M 6 × 0.75 4.9 40.8 19.5 11.3 13.8 0.32

35 UC207D1LLJ 35 72 42.9 20 1.5 17.5 25.4 6 M 6 × 0.75 5.4 46.8 25.7 15.3 13.8 0.46

40 UC208D1LLJ 40 80 49.2 21 1.5 19 30.2 8 M 8×1 6 53 29.1 17.8 14.0 0.64

45 UC209D1LLJ 45 85 49.2 22 1.5 19 30.2 8 M 8×1 6.1 57.5 32.5 20.4 14.1 0.68

50 UC210D1LLJ 50 90 51.6 24 1.5 19 32.6 9 M 8×1 6.1 62.4 35.0 23.2 14.4 0.78

55 UC211D1LLJ 55 100 55.6 25 2 22.2 33.4 9 M 8×1 6.5 69 43.5 29.2 14.3 1.04

60 UC212D1LLJ 60 110 65.1 27 2 25.4 39.7 10 M10 × 1.25 7.3 77 52.5 36.0 14.3 1.46

65 UC213D1LLJ 65 120 65.1 32 2 25.4 39.7 10 M10 × 1.25 7.3 82.5 57.5 40.0 14.4 1.86

70 UC214D1LLJ 70 125 74.6 33 2 30.2 44.4 12 M10 × 1.25 7.7 87 62.0 44.0 14.5 2.10

75 UC215D1LLJ 75 130 77.8 34 2 33.3 44.5 12 M10 × 1.25 8 93 66.0 49.5 14.7 2.34

80 UC216D1LLJ 80 140 82.6 35 2.5 33.3 49.3 12 M10 × 1.25 8 98.1 72.5 53.0 14.6 2.78

85 UC217D1LLJ 85 150 85.7 36 2.5 34.1 51.6 12 M12 × 1.5 7.9 106.4 83.5 64.0 14.7 3.54

90 UC218D1LLJ 90 160 96 37 2.5 39.7 56.3 12 M12 × 1.5 8.7 111.6 96.0 71.5 14.5 4.40

➀ Indicates the minimum allowed chamfer dimension r.

Note 1 : Refer to the related Bearing Units catalog (Cat. No. 2400) for the shaft size tolerances.
2 : The precision of the ball bearings is identical to JIS B1558 (ball bearings for rolling bearings units).
3 : Contact NTN for inch size shaft dimensions and tapered bore style.

31
 Products for Paper Manufacturing Machinery

G C
Ca
2 × ds (120˚ )

r
SφD
d4 d

Triple-Lip seal

S1 S
B

Basic Basic
Shaft Bearing
Part Number Dimensions Dynamic Static Coefficient
Diameter Weight
Load Rating Load Rating

mm mm kN kN kg

d D B C r s min ➀
S S1 G ds Ca d4 Cr Cor fo (Ref.)

25 UC305D1LLJ 25 62 38 20 1.5 15 23 6 M 6 × 0.75 5 36.8 21.2 10.9 12.6 0.35

30 UC306D1LLJ 30 72 43 23 1.5 17 26 6 M 6 × 0.75 5.6 44.9 26.7 15.0 13.3 0.56

35 UC307D1LLJ 35 80 48 25 2 19 29 8 M 8×1 5.7 49.4 33.5 19.1 13.1 0.70

40 UC308D1LLJ 40 90 52 27 2 19 33 10 M10 × 1.25 6.1 56 40.5 24.0 13.2 0.96

45 UC309D1LLJ 45 100 57 29 2 22 35 10 M10 × 1.25 7.1 63.5 53.0 32.0 13.1 1.28

50 UC310D1LLJ 50 110 61 32 2.5 22 39 12 M12 × 1.5 7.9 70.6 62.0 38.5 13.2 1.68

55 UC311D1LLJ 55 120 66 34 2.5 25 41 12 M12 × 1.5 8.5 76.6 71.5 45.0 13.2 2.08

60 UC312D1LLJ 60 130 71 36 2.5 26 45 12 M12 × 1.5 9 82.7 82.0 52.0 13.2 2.62

65 UC313D1LLJ 65 140 75 39 2.5 30 45 12 M12 × 1.5 9.4 88.2 92.5 60.0 13.2 3.22

70 UC314D1LLJ 70 150 78 41 2.5 33 45 12 M12 × 1.5 10 94.8 104 68.0 13.2 3.86

75 UC315D1LLJ 75 160 82 43 2.5 32 50 14 M14 × 1.5 10.5 101.3 113 77.0 13.2 4.70

80 UC316D1LLJ 80 170 86 45 2.5 34 52 14 M14 × 1.5 11.1 107.9 123 86.5 13.3 5.60

85 UC317D1LLJ 85 180 96 47 3 40 56 16 M16 × 1.5 11.5 114.4 133 97.0 13.3 6.70

90 UC318D1LLJ 90 190 96 49 3 40 56 16 M16 × 1.5 12.2 120.9 143 107 13.3 7.60

95 UC319D1LLJ 95 200 103 51 3 41 62 16 M16 × 1.5 12.7 127.5 153 119 13.3 8.70

100 UC320D1LLJ 100 215 108 55 3 42 66 18 M18 × 1.5 14 135.6 173 141 13.2 10.8

➀ Indicates the minimum allowed chamfer dimension r.

Note 1 : Refer to the related Bearing Units catalog (Cat. No. 2400) for the shaft size tolerances.
2 : The precision of the ball bearings is identical to JIS B1558 (ball bearings for rolling bearings units).
3 : Contact NTN for inch size shaft dimensions and tapered bore style.

32
 Size Charts

ULTAGE Series Thrust Spherical Roller Bearings

Bearing Number

φd1
294 20 E
φd A
Bearing type code r

Inside diameter B1
B2 T
Bearing series (type code + height series code + diameter series code.) C
r
φD1
φD

Basic Dynamic Basic Static Basic Dynamic Basic Static

Basic Dimensions Permitted Rotational Speed
Load Rating Load Rating Load Rating Load Rating
Part Number mm kN kgf min-1
Oil Grease
d D T r s min ➀
Ca Coa Ca Coa Lubrication Lubrication
29412E 60 130 42 0.5 451 928 45 900 94 700 3 050 1 650

29413E 65 140 45 2 531 1 120 54 200 114 000 2 850 1 530

29414E 70 150 48 2 608 1 290 62 000 132 000 2 650 1 420

29415E 75 160 51 2 675 1 470 68 800 150 000 2 500 1 330

29416E 80 170 54 2.1 788 1 690 80 400 173 000 2 350 1 250

29417E 85 180 58 2.1 820 1 860 83 600 190 000 2 200 1 170

29418E 90 190 60 2.1 934 2 050 95 200 209 000 2 100 1 110

29420E 100 210 67 3 1 170 2 570 119 000 262 000 1 850 1 000

29422E 110 230 73 3 1 380 3 100 141 000 316 000 1 700 900

29424E 120 250 78 4 1 520 3 550 155 000 362 000 1 550 830

29426E 130 270 85 4 1 770 4 270 181 000 435 000 1 450 760

29428E 140 280 85 4 1 850 4 350 188 000 443 000 1 400 710

29430E 150 300 90 4 2 200 5 270 225 000 537 000 1 300 660

29432E 160 320 95 5 2 410 5 790 246 000 590 000 1 200 620

➀ Indicates the minimum allowed chamfer dimension r.

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 Products for Paper Manufacturing Machinery

φda
Dynamic equivalent axial load
Pa = Fa + 1.2Fr

ra Static equivalent axial load

φdb1 Poa = Fa + 2.7Fr
30˚ Fr
However, 　 ≦ 0.55 is required
Fa
ra

φDa φdb2

Installation Dimensions Static Space

Dimensions Weight
mm Capacity
mm da db1 db2 Da r as kg cm3

B1 B2 C A d1 Min. Max. Max. D1 Max. Max. (Ref.) (Ref.)

27 37 20.5 38 110 90 65 67 85 108 1.5 2.50 83.2

29.3 40 22.5 42 116 100 70 72 95 115 2 3.10 98.6

31.3 43 23.7 44 125 105 75 77 100 125 2 3.75 122

35.4 46 23.9 47 135 115 79 83 104 132 2 4.56 143

35.3 49 26.5 50 143 120 87 87 114 140 2 5.47 173

38.6 51 27.8 54 152 130 92 95 121 150 2 6.54 216

40.5 55 27 56 162 135 95 102 126 157 2 7.51 251

44 58.9 32 62 181 150 107 114 141 175 2.5 10.3 340

48.5 65 35 69 199 165 118 125 156 190 2.5 13.1 439

52.7 71 35.9 74 218 180 128 135 171 205 3 16.7 563

58.5 74 39.6 81 238 195 138 146 180 225 3 21.4 695

56 74.5 42 86 244 205 149 158 196 235 3 22.3 739

60.5 81 43.2 92 264 220 158 168 204 250 3 27.4 838

63 84.9 45.5 99 280 230 170 182 221 265 4 32.5 1 050

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 Bearing Inspection and Maintenance

● Bearing inspection and maintenance ➀ Inspect the bearings while the equipment is
operating
Performing periodic inspections and maintenance
Check the temperature, sound, and vibration of
of the bearings makes it possible to maintain the
the bearings. Examine the characteristics of the
original performance of the bearing for a long time,
lubricant and determine the cycle for refilling or
and also detect any early-stage bearing anomalies.
replacing the lubricant.
Therefore, inspections and maintenance can
increase productivity and economic efficiency by
➁ Visually monitor the bearings
preventing bearing failures before they occur.
Carefully monitor any visible problems that appear
when carrying out periodic inspections after the
The inspection items on the right are generally
bearings have been in use. If there are visible signs
accepted methods for bearing maintenance and
of damage, take measures to prevent recurrence.
care. Depending on the importance of the system
or machinery being used, implementing periodic
✽Bearing Damage – Typical Examples & Causes
inspection cycles is an important aspect of bearing
Refer to the related catalog : Care and Maintenance
maintenance and management.
of Bearings (Cat. No. 3017) for more details.

Installing Tapered Bore Roller Bearings

● Installing tapered bore roller bearings

Install small-sized bearings by using a tapered The appropriate interference fit is obtained by
shaft, withdrawal sleeve, or adapter sleeve. pushing in the axial direction until the correct
Secure the bearing by tightening the locking nut. clearance reduction is achieved. It is also possible
Furthermore, tighten the nut with a mallet or impact to measure the distance the bearing has been
spanner (See Fig. 1). driven axially from the point of initial contact on
the taper to achieve the recommended clearance (a) Installing onto (b) Installing using
a tapered shaft an adapter
Use hydraulic pressure when installing large-size reduction.
bearings, which require a greater force. Figure 2 (a)
shows the method of pushing the bearing onto a A larger interference fit and bearings with a radial
tapered shaft using a hydraulic nut. internal clearance of C3 or higher are required
Figures 2 (b) and (c) show the hydraulic nut when heavy loads are applied, when the bearings
installation method when using an adapter sleeve are running at high speed, and when there is a (c) Installing using
a withdrawal sleeve

or withdrawal sleeve. large temperature difference between the inner and

Fig. 1. Installing using a locking nut
outer rings. Table 1 shows the maximum values
With tapered bore bearings, as the inner ring is for the radial internal clearance reduction and axial
driven axially onto the tapered shaft, adapter or displacement amount used during installation. It is
withdrawal sleeve, the interference will increase and necessary to set the residual clearance above the
the bearing internal radial clearance will decrease. minimum residual clearance value shown in Table 1.
Interference can be estimated by measuring the
decrease in internal radial clearance. [Ref.] Table 2 shows an example calculation for
determining the nut rotation angle when installing a (a) Installing onto
a tapered shaft
(b) Installing using
an adapter

Figure 3 shows the method for measuring the radial spherical roller bearing using an adapter sleeve.
internal clearance of a spherical roller bearing by
inserting a feeler
gauge (thickness
gauge) in between
(c) Installing using
the rollers and the a withdrawal sleeve

outer ring while the Fig. 2. Installing using a hydraulic nut

rollers are sitting

Feeler Gauge
correctly in a non-
Fig. 3. Method of measuring the outer
load position. ring clearance of spherical
roller bearings

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 Products for Paper Manufacturing Machinery

Table 1. Tapered bore spherical roller bearing installation specifications – Type EA/EM Units : mm
Bearing
Radial Internal Clearance (Pre-Installation) Radial Internal Axial Movement Amount (ref.)
Inside Diameter Minimum Residual Radial
Clearance
Internal Clearance
d CN C3 C4 Reduction 1/12 Taper Ratio 1/30

Equal to
Greater
or Less Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. Min. Max. CN C3 C4
Than
Than

24 30 0.030 0.040 0.040 0.055 0.055 0.075 0.010 0.015 0.15 0.20 — — 0.015 0.025 0.040

30 40 0.035 0.050 0.050 0.065 0.065 0.085 0.015 0.020 0.25 0.30 — — 0.015 0.030 0.045

40 50 0.045 0.060 0.060 0.080 0.080 0.100 0.020 0.025 0.35 0.40 — — 0.020 0.035 0.055

50 65 0.055 0.075 0.075 0.095 0.095 0.120 0.025 0.030 0.40 0.45 — — 0.025 0.045 0.065

65 80 0.070 0.095 0.095 0.120 0.120 0.150 0.035 0.040 0.50 0.60 — — 0.030 0.055 0.080

80 100 0.080 0.110 0.110 0.140 0.140 0.180 0.040 0.050 0.60 0.70 — — 0.030 0.060 0.090

100 120 0.100 0.135 0.135 0.170 0.170 0.220 0.055 0.065 0.80 0.90 1.80 2.30 0.035 0.070 0.105

120 140 0.120 0.160 0.160 0.200 0.200 0.260 0.065 0.075 0.90 1.00 1.95 2.70 0.045 0.085 0.125

140 160 0.130 0.180 0.180 0.230 0.230 0.300 0.075 0.090 1.00 1.20 2.35 3.10 0.040 0.090 0.140

160 180 0.140 0.200 0.200 0.260 0.260 0.340 0.080 0.100 1.10 1.40 2.80 3.55 0.040 0.100 0.160

180 200 0.160 0.220 0.220 0.290 0.290 0.370 0.090 0.110 1.20 1.50 3.20 3.95 0.050 0.110 0.180

200 225 0.180 0.250 0.250 0.320 0.320 0.410 0.110 0.130 1.50 1.80 3.85 4.60 0.050 0.120 0.190

225 250 0.200 0.270 0.270 0.350 0.350 0.450 0.120 0.140 1.60 1.90 4.20 4.95 0.060 0.130 0.210

250 280 0.220 0.300 0.300 0.390 0.390 0.490 0.130 0.160 1.60 2.10 4.25 5.40 0.060 0.140 0.230
Note 1 : Applies to solid shaft normal, C3 and C4 clearances
Note 2 : For type 213, refer to the related Ball and Roller Bearings catalog (Cat. No. 2202).
Note 3 : When clearance C2 and P r are > 0.15 C r, a separate evaluation is required. Contact NTN for more information.

Table 2. Example calculation for determining the nut rotation angle

Calculation example (approximation)
Conditions

Bearing part number : 22216EAKD1

Inside diameter : 80 mm, outside diameter : 140 mm, width : 33 mm / 1.299”
EA : EA Type, K : bore taper ratio 1/12, D1 : w/lubricant groove/holes
CN clearance : 0.070-0.095 mm

Adapter sleeve : H316X

Nut : M80 × 2 (inside diameter × pitch)

Reference formula

Axial movement amount

Clearance reduction = × Inner ring expansion coefficient
Taper ratio

Axial movement Nut thread pitch × nut rotation angle

=
amount 360°

Inner ring expansion Inner ring inside diameter 80

= = = 0.8
coefficient Inner ring average groove diameter 100

2 × inner ring inside diameter +

Inner ring average outer ring outside diameter
=
groove diameter
3

2 × 80 + 140
= = 100 mm
3

Nut rotation angle calculation

Radial internal clearance reduction (max.) 0.04 mm

Clearance after Initial clearance clearance
= − = 0.09 − 0.04 = 0.05 mm
installation (measured value) reduction

Axial movement Clearance reduction × taper ratio 0.04 × 12

= = = 0.6 mm
amount Inner ring expansion coefficient 0.8

Axial movement amount × 360° 0.6 × 360

Nut rotation angle = = = 108°
Nut pitch 2

Note : For open type bearings, measure the clearances by using a feeler gauge.
36
 Bearing Damage – Typical Examples & Causes

Creep
The inside or outside diameter surface becomes a mirror
or cloudy.

[Service]
Press Section

Cause
Insufficient interference fit

Correction
Investigate the interference fit

Inner Ring Breakage

Breaking or cracking occurs.

[Service]
Dryer Section

Cause
Excessive inner ring interference stress, thermal shock, impact,
fatigue, poor fitting form

Correction
Investigate the interference fit
Use long operating life EA bearings
✽ See page 11

Rust
Rust and corrosion occur on surfaces of raceways and
rolling elements.

[Service]
Wire Section, Press Section

Cause
Water penetration, condensation, handling with bare hands

Correction
Improve seal performance
Take measures to prevent bearing corrosion during prolonged downtime
Utilization of RustGuard Corrosion-Resistant Bearings
✽ See pages 9-10

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 Products for Paper Manufacturing Machinery

Flaking (Delamination)
The raceway surface peels away in scale-like flakes.

[Service]
Wire Section, Press Section, Dryer Section

Cause
Excessive load, foreign material penetration

Correction
Change to bearings with a larger load capacity
Use of lubricant with a high viscosity

Smearing
Roughening of the raceway surface with minute weld deposits.

[Service]
Calender Stack

Cause
Poor lubricant performance for the rotating motion of the roller elements

Correction
Prevent sliding
(reduce the radial internal clearance, consider precompression).
Use of lubricant with a high viscosity
Use long operating life EA bearings
✽ See pages 11-12

Electrolytic Erosion
Fluting formed by small surface pits across the raceways.

[Service]
Electric Motors

Cause
Raceway surface melting due to electric current conduction and
sparking inside the bearing

Correction
Discharge the current via a slip ring, etc.
Use MEGAOHM™ Insulated Bearings
✽ See page 15

38