Bevel

Gears

Gears
Spur
Helical
Gears
MHP MBSG SBSG MBSA/MBSB SBS SBZG
High-Ratio Hypoid Gears Ground Spiral Bevel Gears Ground Spiral Bevel Gears Finished Bore Spiral Bevel Gears Spiral Bevel Gears Ground Zerol Bevel Gears

Internal
Gears
Gear Ratio Gear Ratio 2 Gear Ratio Gear Ratio Gear Ratio Gear Ratio
15 ～ 60 1.5 ～ 3 1.5 ～ 3 1.5 ～ 4 1.5 ～ 2

Precision: 3 Precision: 1 Precision: 2 Precision: 4 Precision: 2

Material: SCM415 Material: SCM415 Material: S45C Precision: 4 Material: S45C Material: S45C
Heat Treatment: Tooth area Heat Treatment: Tooth area Heat Treatment: Gear teeth Material: SCM415 Heat Treatment: Gear teeth Heat Treatment: Gear teeth
carburized carburized induction hardened Heat Treatment: Carburized induction hardened induction hardened
m 1, 1.5 Page 308 m2 ～ 4 Page 310 m2 ～ 4 Page 312 m2 ～ 6 Page 314 m1 ～ 5 Page 318 m2 ～ 3 Page 322

Racks
SB SBY SB SUB PB DB
Steel Bevel Gears Steel Bevel Gears Steel Bevel Gears & Pinion Shafts Stainless Steel Bevel Gears Plastic Bevel Gears Injection Molded Bevel Gears
Gear Ratio Gear Ratio Gear Ratio 5 Gear Ratio Gear Ratio Gear Ratio 2
1.5 ～ 4 2～4 1.5 ～ 3 1.5 ～ 3

CP Racks
& Pinions
Precision: 3 Precision: 3 Precision: 3 Precision: 3 Precision: 4 Precision: 6
Material: S45C Material: S45C Material: S45C Material: SUS303 Material: MC901 Material: Duracon (M90-44)
m1 ～ 6 Page 324 m5 ～ 8 Page 324 m 1.5 ～ 3 Page 328 m 1.5 ～ 3 Page 330 m1 ～ 3 Page 332 m 0.5 ～ 1 Page 334

BB Nissei KSP
Sintered Metal Bushings Ground Spiral Bevel Gears

Gears
Miter
Gear Ratio
1.5 ～ 2

Precision: 0
Material: SCM415
Heat Treatment: Tooth area
Material: Oil-free copper alloy carburized
φ5 ～ 6 m 1.5 ～ 5

Gears
Page 334 Page 336

Bevel
Catalog Number of KHK Stock Gears

Screw
Gears
The Catalog Number for KHK stock gears is based on the simple formula listed below. Please order KHK gears by specifying the Catalog
Numbers.

(Example) Bevel Gears

Products Gearboxes Gear Pairs

M BS G 2 - 40 20 R Material Type

Worm
S S45C B Straight Bevel Gears
M SCM415 BS Spiral Bevel Gears
SU SUS303 HP High Ratio Hypoid Gears
Direction of Spiral ( R )
P MC901
No. of teeth of mating gear (20) D DURACON Other Information
Bevel

No. of teeth (40) G Ground Gears

Module (2)
Others (Ground Gear)
Other

Type (Spiral Bevel Gear)

Material (SCM415)

301
 Bevel Gears KHK Technical Information

Characteristics Selection Hints

KHK stock bevel gears are available in two types, spiral and straight tooth, in gear ratios of 1.5 through 5, and are offered in a large Please select the most suitable products by carefully considering the characteristics of items and contents of the product ta-
variety of modules, numbers of teeth, materials and styles. The following table lists the main features for easy selection. bles. It is also important to read all applicable “CAUTION” notes shown below before the final selection.

Tooth Precision 1. Caution in Selecting the Mating Gears

Type

Heat Treat- Secondary

Catalog No. Module Gear Ratio Material Surface JIS B 1704 Features
ment
Finish : 1978
Operations Basically, KHK stock bevel gears should be selected as
High speed reduction ratio, high efficiency,
shown in the catalog in pairs (e.g. MBSG2-4020R should
1、1.5 15 ～ 60 SCM415 Carburized Cut 3 △ mate with MBSG2-2040L). But, for straight tooth bevel
Hypoid

MHP
Gear

Note 1 high rigidity and compact gear assembly.

Carburized High strength, abrasion-resistant and com- gears, there is some interchangeability with different series.
MBSG 2～4 2 SCM415 Ground 1 △
Note 1 pact for high-speed & torque use. For plastic bevel gears, we recommend metal mating gears
Gear teeth Reasonably priced ground gear, for good heat conductivity.
Spiral bevel gears

SBSG 2～4 1.5 ～ 3 S45C induction Ground 2 △

hardened yet remachinable except for the gear teeth.

Carburized Superior performance with regard to high

KSP 1.5 ～ 5 1.5、2 SCM415 Ground 0 △ ■ Selection Chart for Straight Bevel Gears ( ○ Allowable × Not allowable)
Note 1 speed, low noise, and low vibration.
Ready to use without performing secondary Right（R） Left（L）
MBSA・MBSB 2～6 1.5 ～ 3 SCM415 Carburized Cut 4 ×
operations. Strong and abrasion resistant.
Gear
SB SUB PB DB
Pinion
Gear teeth Large nos. of teeth and modules are offered ■ Selection Chart for Spiral Bevel Gears ( ○ Allowable × Not allowable)
SBS 1～5 1.5 ～ 4 S45C induction Cut 4 △ SB ○ ○ ○ ×
hardened in these affordable spiral bevel gears.
SUB ○ ○ ○ × Gear MBSA
Gear teeth A spiral bevel gears with a helix angle less than 10°. MBSG SBSG
MBSB
SBS
2～3 1.5 ～ 2 S45C induction Ground 2 △ ○ ○ ○ ×
Gears
Bevel

Pinion
Receives forces from the same directions straight bevel
Zerol

SBZG PB
hardened gears receive and have excellent precision. MBSG ○ × × ×
DB × × × ○
Popular series of straight bevel gears for
SB・SBY 1～8 1.5 ～ 5 S45C ― Cut 3 ○ × ○ × ×
Straight bevel gears

many uses. SBSG

■ Zerol Bevel Gears
1.5 ～ 3 1.5 ～ 3 SUS303 ― Cut 3 ○
Suitable for food machinery due to SUS303's MBSA・MBSB × × ○ ×
SUB rust-resistant quality. SBZG products are not interchangeable with products in
other series. SBS × × × ○
MC nylon products are light and can be
PB 1～3 1.5 ～ 3 MC901 ― Cut 4 ○
used without lubricant.
Duracon Injection Injection molded, mass-produced produc- 2. Caution in Selecting Gears Based on Gear Strength
DB 0.5 ～ 1 2 ― 6 △
（M90-44） Molded tions, suitable for office machines. The gear strength values shown in the product pages were computed by assuming a certain application environment. Therefore,
〔NOTE 1〕Although these are carburized products, secondary operations can be performed as
○ Possible △ Partly possible they should be used as reference only. We recommend that each user computes their own values by applying the actual usage
the bore and the hub portions are masked during the carburization. However, as a
× Not possible conditions. To learn more about strength calculation, please refer to the technical information contained in the “Bending Strength
precaution, high hardness (HRC40 at maximum) occurs in some cases.
of Bevel Gears” section on Page 87, and the “Surface Durability of Bevel Gears” section on Page 92.

■ Calculation assumptions for Bending Strength of Gears

Catalog No. MBSG SBSG
　 SB NOTE 3
MBSA SBZG SUB PB DB
Application Examples SBY
Item MBSB SBS

KHK stock bevel gears are used as gears for power transmission of intersecting axes in various devices. Formula NOTE 1 Formula of bevel gears on bending strength(JGMA403-01) The Lewis formula
No. of teeth of mating gear No. of teeth of the mating gear of the set －－－
Rotational Speed 100rpm（600rpm for MBSG, SBSG and SBZG） 100rpm
■ Differential Gear Mechanism Example ■ SHESCO 2WD Bike Design Life (Durability) Over 107cycles －－－
Impact from motor Uniform load Allowable bending stress（kgf/mm2）
Impact from load Uniform load m 0.5 4.0
Direction of load Bidirectional 1.15 m 0.8 4.0
（40℃ with No m 1.0 3.5
Allowable bending stress at root σFlim(kgf/mm2) NOTE 2 47 21 19（24.5） 10.5 Lubrication） （40℃ with Grease
Safety factor KR 1.2 Lubrication）

■ Calculation assumptions for Surface Durability (Except those in common with bending strength)
Formula NOTE 1 Formula of bevel gears on surface durability（JGMA404-01）
Kinematic viscosity of lubricant 100cSt（50℃）
Gear support Shafts & gear box have normal stiffness, and gears are supported on one end
Allowable Hertz stress σHlim(kgf/mm2) 166 90 49（62.5） 41.3
Safety factor CR 1.15
〔NOTE 1〕The gear strength formula is based on JGMA (Japanese Gear Manufacturers Association) specifications. “MC Nylon Technical Data” by Nippon
Polypenco Limited and “Duracon Gear Data” by Polyplastic Co. Also, the units (rpm) of number of rotations and unit (kgf/mm2) of stress are
adjusted to the units needed in the formula.
〔NOTE 2〕The allowable bending stress at the root σFlim is calculated from JGMA403-01, and set to 2/3 of the value in the consideration of the use of planetary-,
idler-, or other gear systems, loaded in both directions.
〔NOTE 3〕Since SB Bevel Pinion Shafts are thermally refined, the allowable tooth-root bending stress and allowable hertz stress are the value shown in parentheses.
Image provided by: PK Design SB Bevel Gears are used in the driving components in both the front and rear wheels

302 303
 Bevel Gears KHK Technical Information

Application Hints
In order to use KHK stock gears safely, carefully read the Application Hints before proceeding. If there are questions or you re- ④ When installing MBSA or MBSB spiral bevel gears pro- 4. Cautions on Starting
quire clarifications, please contact our technical department or your nearest distributor. duced in B7 style (ring type), always secure the gears onto
▪ TEL: 81-48-254-1744 FAX: 81-48-254-1765 E-mail: info@khkgears.net the mounting base with taper pins to absorb the rota- ① Check the following items before starting.
tional loads. It is dangerous to secure with bolts only. • Are the gears installed securely?
1. Cautions on Handling ⑦ When heat treating S45C products, it is possible to get • Is there uneven tooth contact?
thermal stress cracks. It is best to subject them to pen- • I s there adequate backlash? Be sure to avoid ze-
① KHK products are packaged one by one to prevent etrant inspection afterwards. While the teeth strength ro-backlash.
Taper pin

scratches and dents, but if you find issues such as rust, may increase four fold, the precision of the gear will • Has proper lubrication been supplied?
scratches, or dents when the product is removed from drop approximately one grade. ② If gears are exposed, be sure to attach a safety cover to
the box after purchase, please contact the supplier.
Gear

⑧ For the handling conveniences, the SB and SBY series ensure safety. Also, be careful not to touch rotating gears.
② Depending on the handling method, the product may be- listed below have the tapped holes (180 apart, 2 places)
o
③ Gears can be lubricated with the "grease lubrication
come deformed or damaged. Resin gears and ring gears
Mounting base

on the holding surface. method", "splash lubrication method (oil bath method),"
deform particularly easily, so please handle with care.
or "forced lubrication method (circulation lubrication
2. Caution on Performing Secondary Operations Catalog No. L（mm） Tap Size
method)". For initial operation, the lubricant may dete-
⑤ KHK stock bevel gears are designed such that, when as-
① If you are reboring, it is important to pay special atten- SB6-4515 130 M10 deep 20 riorate markedly, so check the condition of the lubricant
sembled according to the specified mounting distance
tion to locating the center in order to avoid runout. SBY8-4020 160 M10 deep 20 after starting. For more technical information, please
with a tolerance of H7 to H8, the normal direction back-
② The reference datum for gear cutting is the bore. There- 210 M10 deep 20 see the section "Gear Lubrication" (Page 112) of our
SBY8-4515 lash shown in the table is obtained. Mounting distance
fore, it is best to use the bore for locating the center. If technical reference book.
SBY5-6015 160 M10 deep 20 error, offset error and shaft angle error must be mini-
it is too difficult to do for small bores, the alternative is ④ If there is any abnormality such as noise or vibration
SBY6-6015 220 M10 deep 20 mized to avoid excessive noise and wear. For various
to use one spot on the bore and the runout of the side during startup, check the gears and assembly condi-
conditions of teeth contact, please see the following il-
surface. tion. “High gear accuracy”, “smooth gear teeth surface”
lustrations, “Correct Tooth Contact” and “Incorrect Tooth
③ If reworking using scroll chucks, we recommend the use and “correct tooth contact” are some of the measures
Contact”.
of new or rebored jaws for improved precision. Please against gear noise. For more technical information,
exercise caution not to crush the teeth by applying too please see the section “Gear Noise and Countermea-
much pressure. Any scarring will cause noise during op- 3. Points of Caution in Assembling sures” (Page 119) of our technical reference book.
eration.
① Since bevel gears are cone shaped, they produce axial
thrust forces. Especially for spiral bevel gears, the direc- Gear Ratio Normal direction Travel in axial direction
Correct Tooth Contact
tions of thrust changes with the hand of spiral and the
(Reduction Ratio) Backlash Pinions Gears
● When assembled correctly, the contact will occur
direction of rotation. This is illustrated below. The bear- 1.5 0.81 x jn 1.22 x jn on both gears in the middle of the flank and center
of face width but somewhat closer to the toe.
ings must be selected properly to be able to handle these 2 0.65 x jn 1.31 x jn
thrust forces. For details, please refer to separate technical 2.5 0.54 x jn 1.36 x jn
reference book, section of “Gear Forces” (Page 107). jn
3 0.46 x jn 1.39 x jn
Direction of rotation and thrust force 4 0.35 x jn 1.42 x jn

Thrust Thrust 5 0.29 x jn 1.43 x jn

Lathe operations Drive 15 or more 1.4 x jn ÷ Gear Ratio 1.40 x jn Center contact closer to toes
④ For items with induction hardened teeth, such as SBSG and
SBS series, the hardness is high near the tooth root. When ma- Incorrect Tooth Contact
chining the front end, the machined area should be 4 to 6mm Thrust Thrust
Thrust
smaller than the dimension, J. Thrust
■ Mounting Distance Error ■ Offset Error ■ Shaft Angle Error
● When the mounting distance of the ● When the pinion shaft is offset, the ● When there is an angular error of
Drive
pinion is incorrect, the contact will contact surface is near the toe of one shafts, the gears will contact at the
occur too high on the flank on one gear and near the heel of the other. toes or heels depending on whether
Thrust Thrust
gear and too low on the other. the angle is greater or less than 90° .
Low contact Heel contact
High contact
[NOTE] Bevel gears with the gear ratio 1.57 or less, produce a thrust force which Error
is the same as miter gears. For details, see page 274. Error
Error

② If a bevel gear is mounted on a shaft far from the bear-

ings, the shaft may bend. We recommend mounting Toe contact
bevel gears as close to the bearings as possible. This is es- Toe contact
High contact
pecially important since most bevel gears are supported
Toe contact
Lathe operations Heel contact
Low contact
on one end. The bending of shafts will cause abnormal
⑤ For tapping and keyway operations, see the examples
Error Error
noise and wear, and may even cause fatigue failure of the Error
given in “1. Caution on Performing Secondary Oper-
shafts. Both shafts and bearings must be designed with
ations” in KHK Stock Spur Gear section. When cutting
sufficient strength.
keyways, to avoid stress concentrations, always leave Heel contact
③ Due to the thrust load of bevel gears, the gears, shafts
radii on corners.
and bearings have the tendency to loosen up during op-
⑥ PB plastic bevel gears are susceptible to changes due
to temperature and humidity. Dimensions may change eration. Bevel gears should be fastened to the shaft with
between, during, and after re-machining operations. keys and set screws, taper pins, step shafts, etc.

304 305
 MHP MHP
High-Ratio Hypoid Gears High-Ratio Hypoid Gears

■ Features of MHP High Ratio Hypoid Gears ■ Variations in tooth contact due to poor alignment of gears
A pair of MHP high-ratio hypoid gears are able to produce an amazing reduction of speed of 60:1 in one stage.
If the gear engagement position is out of the normal position, variations in tooth contact, as illustrated below,
Gears

Gears
Spur

Spur
may appear.
1. Total-cost reduction
The MHP provides a compact gearing
body replacing several stages of reduction
Efficiency

Comparison of the efficiency of MHP High Ratio Hypoid Gear and Worm Gear
Helical

Helical
gears. This reduces the cost sharply. (1) Tooth contact in case of a shaft-angle error (2) Tooth contact in case of a shaft-offset error
Gears

Gears
2. High efficiency
Compared to worm gear drives, the MHP
Toe contact
has less sliding contact. The resulting MHP
Internal

Internal
higher efficiency allows the use of smaller
Gears

Gears
Toe Toe High heel
contact contact contact
Error
motors (See the graph on the right).
Worm Gear
Toe Low toe
contact contact
3. High rigidity High toe
contact
The carburized hypoid gears lead to small-
Racks

Racks
er size than comparable worms gears. Error

4. Compact gear assembly Low heel

contact
(Offset is large)

The size of the gear housing is nearly the

same as outer diameter of the large gear.
CP Racks

CP Racks
& Pinions

& Pinions
(See the diagrams below)
Low toe
contact

■ How to determine the radial and thrust loads Heel

Error
contact
High toe
Before using the MHP high-ratio hypoid gears, be sure to confirm the Heel contact
Gears

Gears
Heel
Miter

Miter
contact contact

direction of radial and thrust loads. Following equations are used to

Error
(Offset is small)
Comparison of MHP and Worm Gear
compute these loads. The radial and thrust load coefficients are given
on the product pages.
Worm Gear

High heel
Gears

Gears
Low heel
Bevel

Bevel
Position contact contact
Heel contact
Reduction
Radial load calculation
WRP ：Radial load on the pinion or L(N)
n (3) Tooth contact in case of a pinion set position error (4) Tooth contact in case of a gear set position error
　　 WRP ＝ WKP × TG × z
Screw

Screw
Gears

Gears
Raw Material
WKP ：Radial load coefficient of pinion or L (given on the product pages)
TG ：Torque of gear or R(N.m)
Strength
Low heel
n ：Number of teeth of pinion or L
contact
Miniaturization Toe
contact
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

of Main Body
+ z ：Number of teeth of gear or R High toe
Worm

Worm
contact Error
Induction Hardened
+
WRG ：Radial load on the gear or R(N) Toe
contact
　　 WRG ＝ WKG × TG
Heat Treated

WKG ：Radial load coefficient of gear or R (given on the product pages)

TG ：Torque of gear or R(N.m)
Efficiency
Reduced Mo-
High heel
Bevel

Bevel
tor Capacity Low toe contact
contact Heel
contact Error
Heel
contact

ex,50W
Thrust load calculation
WXP ：Thrust load on the pinion or L(N)
Other

Other
n
ex,60W
　　 WXP ＝ WNP × TG × z
WNP ：Thrust load coefficient of pinion or L (given on the product page) High toe
Heel
contact
contact
TG ：Torque of gear or R(N.m) Heel Error
n ：Number of teeth of pinion or L Low toe
contact Low heel
Toe
contact
contact

z ：Number of teeth of gear or R contact

Error

WXG ：Thrust load of gear or R(N)

　　 WXG ＝ WNG × TG
WNG ：Thrust load coefficient of gear or R (given on the product pages) Toe contact

TG ：Torque of gear or R(N.m) High heel

contact

306 307
 MHP Module 1、1.5 MHP
High-Ratio Hypoid Gears High-Ratio Hypoid Gears
E
Specifications F
Precision grade JIS B 1704 : 1978 grade 3 H
E

(J )
Gear teeth Gleason F
Pressure angle 20° ＊ I
(J) I
Gears

Gears
Spur

Spur
G
Material SCM415 CW CCW

C(D)
L

A
B
G

D
Carburizing

A
Heat treatment

L
Tooth hardness 60 ～ 63HRC

＊ 22°30′for MHP1.5-0453R/3045L and

Helical

Helical
MHP1.5-0451R/1045L
Gears

Gears
B8 B9

Reduction Nominal Actual No. of Direction Bore・Shaft Dia. Hub dia. Pitch dia. Outside dia. Mounting distance Total length Hub width Length of bore and shaft Face width Holding surface dia. Offset Radial load coefficient Thrust load coefficient Allowable transmission Allowable transmission Backlash Weight
Catalog No. ratio module module teeth of spiral
Shape Catalog No.
A（Bore: H7・Shaft: h7） B C D E F H I (J) K L CW CCW CW CCW torque (N·m) torque (kgf·m) (mm) (kg)

MHP1-0453R 45 R B9 12 30 48 48 19 16.3 7 14 35.1 48.48 −37.67 13 31.74 0.15 MHP1-0453R

Internal

Internal
15 m1 1.067 (6) 10 10.3 1.05 0.05~0.15
Gears

Gears
MHP1-3045L 3 L B8 22.1 ― 10.3 10.3 127 113 ― 94 ― 147.3 523.74 969.92 −831.16 0.29 MHP1-3045L
MHP1.5-0453R 45 R B9 14 40 78 78 28 23.7 10 20 56.5 26.78 −18.67 8.98 21.19 0.50 MHP1.5-0453R
15 m1.5 1.733 (10) 18 41.2 4.20 0.10~0.20
MHP1.5-3045L 3 L B8 31.1 ― 17.6 17.6 170 148 ― 116 ― 100.09 338.45 566.72 −466.63 0.73 MHP1.5-3045L
MHP1.5-0603R 60 R B9 20 50 98 98 33 28.7 13 25 76.8 20.44 −16.54 7.15 13.95 0.94 MHP1.5-0603R
20 m1.5 1.633 (10) 22 82.4 8.40 0.10~0.20
MHP1.5-3060L 3 L B8 36.1 ― 15.7 15.7 199 168 ― 135 ― 119.32 302.18 577.56 −511.77 1.15 MHP1.5-3060L
Racks

Racks
MHP1-0602R 60 R B9 12 34 63 63 21 17.8 8 16 46.4 33.59 −24.15 8.21 24.77 0.29 MHP1-0602R
30 m1 1.05 (8) 18 24.1 2.46 0.05~0.15
MHP1-2060L 2 L B8 22.1 ― 12.8 12.8 134 120 ― 94 ― 186.59 784.31 1461.23 −1248.6 0.28 MHP1-2060L
MHP1-0451R 45 R B9 12 30 48 48 19 16.5 7 14 34.9 48.04 −35.58 11.13 34.11 0.16 MHP1-0451R
45 m1 1.067 (6) 14 11.3 1.15 0.05~0.15
MHP1-1045L 1 L B8 20.1 ― 10.1 10.1 115 104 ― 85 ― 400.81 1579.79 3014.6 −2605.26 0.22 MHP1-1045L
CP Racks

CP Racks
& Pinions

& Pinions
MHP1.5-0451R 45 R B9 14 40 78 78 28 23.9 10 20 56 26.36 −16.04 6.88 22.02 0.50 MHP1.5-0451R
45 m1.5 1.733 (10) 25 46.6 4.75 0.10~0.20
MHP1.5-1045L 1 L B8 26.1 ― 18.3 18.3 152 138 ― 102 ― 233.59 1034.08 1755.84 −1439.58 0.48 MHP1.5-1045L
MHP1-0601R 60 R B9 12 34 63 63 21 17.9 8 16 46.3 33.34 −23.12 7.41 25.14 0.29 MHP1-0601R
60 m1 1.05 (8) 20 25.3 2.58 0.05~0.15
MHP1-1060L 1 L B8 22.1 ― 12.9 12.9 134 122 ― 94 ― 357.61 1564.81 2936.72 −2514.09 0.28 MHP1-1060L
MHP1.5-0601R 60 R B9 20 50 98 98 33 28.2 13 25 76.8 22.63 −17.19 5.82 15.81 0.94 MHP1.5-0601R
60 m1.5 1.633 (10) 30 94.0 9.58 0.10~0.20
MHP1.5-1060L 1 L B8 31.1 ― 17.7 17.7 175 151 ― 116 ― 303.06 974.4 1912.11 −1675.65 0.77 MHP1.5-1060L
Gears

Gears
Miter

Miter
[Caution on Product Characteristics] ① The allowable torques are obtained from the results of experimentation with the pinion at 600 rpm, lubricated with [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/or second-
Kingstar SG-O (NIHON GREASE). ary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is
② Radial and thrust load coefficients are the factors used for calculation of those loads. As shown in the figure B8, CW and also available.
CCW stand for clockwise and counterclockwise rotation. A plus sign means that the two gears in a set move away each ② In the illustration, the area surrounded with line is masked during the carburization process and can be modified.
other when load is applied. A minus sign means that two gears in a set approach each other when load is applied. For However, care should be exercised since the hardness is high (approx. HRC40, maximum).
Gears

Gears
Bevel

Bevel
more details, see the section “How to determine the radial and thrust loads” on Page 306.
Screw

Screw
Gears

Gears
■ Helix Hands and Offset Position
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

MHP High Ratio Hypoid Gears are designed to be right hand helix for gears, left hand helix for pin-
Worm

Worm
ions. The opposite helix hand gears are not available for these products. Also, the offset position is
already set, so please refer to the illustration bellow when designing or assembling.
Bevel

Bevel
Other

Other
308 Inquiries are now being accepted on our website. 309
 MBSG Module 2、2.5、3、4 MBSG
Ground Spiral Bevel Gears Ground Spiral Bevel Gears
E
Specifications F
J
Precision grade JIS B 1704 : 1978 grade 1 G K
J H G
Gear teeth Gleason G

E
G
Pressure angle 20°

F
Gears

Gears
Spur

Spur
I

G
H
Helix angle 35°
G

D
K

A
B
C
Material SCM415 A
Heat treatment Carburizing B
C
Tooth hardness 55 ～ 60HRC
Helical

Helical
Gears

Gears
D
B3 B4

Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module No. of teeth
of spiral
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

MBSG2-4020R 40 R B4 15 45 80 81.1 45 31.78 26.1 18 29 52.7 56.5 94.2 5.76 9.61 0.57 MBSG2-4020R
Internal

Internal
m2 14 0.04~0.10
Gears

Gears
MBSG2-2040L 20 L B3 12 35 40 44.1 55 28.16 16.02 13.75 27 25.39 28.2 47.1 2.88 4.80 0.18 MBSG2-2040L
MBSG2.5-4020R 40 R B4 16 55 100 101.29 50 33.35 26.29 16 30 66.99 108 184 11.0 18.7 1.01 MBSG2.5-4020R
m2.5 17 0.05~0.11
MBSG2.5-2040L 20 L B3 12 43 50 55.12 65 31.01 16.28 13.25 29 29.97 54.1 91.8 5.52 9.37 0.31 MBSG2.5-2040L
2
MBSG3-4020R 40 R B4 20 65 120 121.57 60 39.81 31.57 20 35 80.28 185 318 18.8 32.4 1.64 MBSG3-4020R
m3 20 0.06~0.12
MBSG3-2040L 20 L B3 16 52 60 66.03 80 38.9 21.51 18 36.5 36.56 92.4 159 9.42 16.2 0.56 MBSG3-2040L
Racks

Racks
MBSG4-4020R 40 R B4 25 80 160 162.06 75 48.27 37.06 22 42 106.63 441 778 45.0 79.3 3.55 MBSG4-4020R
m4 27 0.09~0.15
MBSG4-2040L 20 L B3 20 70 80 88.46 100 45.38 22.12 17.5 43 51.25 221 389 22.5 39.7 1.20 MBSG4-2040L
[Caution on Product Characteristics] ① Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/or second-
page 303 for more details. ary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is
CP Racks

CP Racks
& Pinions

& Pinions
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- also available.
ferences will occur due to the corner chamfering of the gear tips. ② In the illustration, the area surrounded with line is masked during the carburization process and can be modified.
③ These gears produce axial thrust forces. Please see Page 304 for more details. However, care should be exercised since the hardness is high (approx. HRC40, maximum).
Gears

Gears
Miter

Miter
Gears

Gears
Bevel

Bevel
Screw

Screw
Gears

Gears
■ Contact Surface of Spiral Bevel Gears RH Spiral as a driving gear ■ Forces Acting on Spiral Bevel Gear Teeth
Rotating Direction of Contact Surface
Tooth surfaces of spiral gears have concave and convex sides. For a spiral bevel gear with shaft angle Σ=90°, pressure angle αn=20°, and spiral angle βm=35°, the
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Changes in the rotational direction of the driving gear alter the Driving Gear Note 1 Driving Gear (RH Spiral) Driving Gear (LH Spiral) tables below show the axial thrust force Fx and the radial force Fr when a tangential force Ft of 100
Worm

Worm
contact surface accordingly. The illustrations show the top view units is applied at the center of face width. For details, please refer to separate technical reference
RH Rotation
of RH and LH Spiral Gears, and the tables on the right explain the Convex Surface Concave Surface book, section of “Features of Tooth Surface Contact” (Page 107).
(Clockwise)
different contact surface depending on the situation.
LH rotation
Concave Surface Convex Surface
Bevel

Bevel
Concave surface (counterclockwise) Axial Thrust Force Fx
The tables show the values of
Radial Force Fr

LH Spiral as a driving gear （1）Forces acting upon pinion （2）Forces acting upon gear
Other

Other
Rotating Direction of Contact Surface Contact Gear Ratio　z2/z1 Contact Gear Ratio　z2/z1
Driving Gear Note 1 Driving Gear (LH Spiral) Driving Gear (RH Spiral) Surface Surface
Tooth Tooth 1.0 1.5 2.0 2.5 3.0 4.0 5.0 1.0 1.5 2.0 2.5 3.0 4.0 5.0
Convex surface
RH spiral LH spiral
RH Rotation Concave 80.9 82.9 82.5 81.5 80.5 78.7 77.4 Concave 80.9 75.8 71.1 67.3 64.3 60.1 57.3
Concave Surface Convex Surface
(Clockwise) Surface － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8 Surface － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9

LH Rotation Convex － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9 Convex － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8
Convex Surface Concave Surface
(Counterclockwise) Surface 80.9 75.8 71.1 67.3 64.3 60.1 57.3 Surface 80.9 82.9 82.5 81.5 80.5 78.7 77.4

〔Note 1〕Rotation directions given in the tables are for viewing the
gears from the hub side.

310 Inquiries are now being accepted on our website. 311

 SBSG Module 2、2.5、3、4 SBSG
Ground Spiral Bevel Gears Ground Spiral Bevel Gears
E
Specifications F
J
G
Precision grade JIS B 1704 : 1978 grade 2 K
J H
Gear teeth Gleason G
G

E
Pressure angle 20°
Gears

Gears
G
Spur

Spur
F
I

G
I
Helix angle 35°

H
G

D
K

A
B
C
Material S45C
A
Heat treatment Teeth induction hardened
B
Tooth hardness 50 ～ 60HRC C
Helical

Helical
D
Gears

Gears
B3 B4
Surface treatment Black oxide coated except for ground part

No. of Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth of spiral
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SBSG2-3020R 30 R B4 12 35 60 61.6 40 26.6 21.2 15 23 37.56 14.1 14.2 1.44 1.44 0.26 SBSG2-3020R
Internal

Internal
m2 11 0.05~0.11
Gears

Gears
SBSG2-2030L 20 L B3 10 30 40 43.55 45 24.91 16.18 11.67 22 21.34 9.61 9.44 0.98 0.96 0.13 SBSG2-2030L
SBSG2.5-3020R 30 R B4 15 45 75 77.09 50 33.86 26.56 18 30 45.61 29.0 29.7 2.96 3.03 0.55 SBSG2.5-3020R
m2.5 15 0.06~0.12
SBSG2.5-2030L 20 L B3 12 40 50 54.43 55 30.88 18.98 14.17 28 27.42 19.8 19.8 2.02 2.02 0.28 SBSG2.5-2030L
1.5
SBSG3-3020R 30 R B4 16 50 90 92.21 55 35.34 26.66 17 31 57.14 48.4 50.4 4.94 5.14 0.82 SBSG3-3020R
m3 17 0.07~0.13
SBSG3-2030L 20 L B3 16 45 60 65.58 70 40.17 26.86 20 37 34.71 33.1 33.6 3.37 3.42 0.49 SBSG3-2030L
Racks

Racks
SBSG4-3020R 30 R B4 20 70 120 122.85 75 47.49 37.14 25 40 78.59 106 113 10.8 11.5 1.90 SBSG4-3020R
m4 20 0.10~0.16
SBSG4-2030L 20 L B3 20 60 80 87.34 90 48.17 32.45 23.33 43 46.89 72.2 75.3 7.36 7.68 1.05 SBSG4-2030L
SBSG2-4020R 40 R B4 12 40 80 80.99 45 32.26 25.99 18 27 48.46 25.5 26.7 2.60 2.73 0.51 SBSG2-4020R
m2 15 0.05~0.11
SBSG2-2040L 20 L B3 12 32 40 44.10 60 34.04 21.02 18 32 20.92 12.8 13.4 1.30 1.36 0.19 SBSG2-2040L
CP Racks

CP Racks
& Pinions

& Pinions
SBSG2.5-4020R 40 R B4 15 50 100 101.27 55 39.65 31.27 20 34 59.28 51.7 55.1 5.27 5.62 1.06 SBSG2.5-4020R
m2.5 20 0.06~0.12
SBSG2.5-2040L 20 L B3 12 40 50 55.21 75 43.61 26.30 22.5 40 20.56 25.9 27.6 2.64 2.81 0.42 SBSG2.5-2040L
2
SBSG3-4020R 40 R B4 20 60 120 121.48 65 45.76 36.48 24 38 73.81 84.8 91.9 8.65 9.38 1.67 SBSG3-4020R
m3 22 0.07~0.13
SBSG3-2040L 20 L B3 16 50 60 66.06 90 50.63 31.52 27.5 47 29.61 42.5 46.0 4.33 4.69 0.69 SBSG3-2040L
SBSG4-4020R 40 R B4 20 70 160 162.07 80 53.69 42.07 28 45 102.39 195 217 19.9 22.2 3.33 SBSG4-4020R
m4 28 0.10~0.16
SBSG4-2040L 20 L B3 20 60 80 88.50 120 66.24 42.12 35 62 42.78 97.9 109 9.98 11.1 1.53 SBSG4-2040L
Gears

Gears
Miter

Miter
SBSG2-4515R 45 R B4 12 40 90 90.67 40 30.29 26.01 17 26 59.04 34.8 28.1 3.55 2.87 0.60 SBSG2-4515R
m2 15 0.05~0.11
SBSG2-1545L 15 L B3 10 24 30 34.78 60 29.66 15.80 14 29 19.13 11.2 9.38 1.14 0.96 0.095 SBSG2-1545L
SBSG2.5-4515R 45 R B4 15 50 112.5 113.32 50 38.25 32.47 22 35 72.84 59.0 48.3 6.01 4.93 1.21 SBSG2.5-4515R
3 m2.5 20 0.06~0.12
SBSG2.5-1545L 15 L B3 12 30 37.5 43.36 75 38.27 19.73 17.5 37 20.51 18.9 16.1 1.93 1.64 0.19 SBSG2.5-1545L
Gears

Gears
SBSG3-4515R 45 R B4 20 60 135 135.99 55 40.59 33.98 20 35 88.18 99.3 82.5 10.1 8.41 1.99 SBSG3-4515R
Bevel

Bevel
m3 23 0.07~0.13
SBSG3-1545L 15 L B3 15 38 45 52.08 90 44.98 23.68 21.33 44 28.54 31.8 27.5 3.24 2.80 0.34 SBSG3-1545L
[Caution on Product Characteristics] ① Allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/or second-
page 303 for more details. ary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- also available.
ferences will occur due to the corner chamfering of the gear tips. ② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including
Screw

Screw
Gears

Gears
③ These gears produce axial thrust forces. Please see Page 304 for more details. the bottom land (approx. 2 to 3 mm).
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Worm

Worm
■ Contact Surface of Spiral Bevel Gears RH Spiral as a driving gear ■ Forces Acting on Spiral Bevel Gear Teeth
Rotating Direction of Contact Surface
Tooth surfaces of spiral gears have concave and convex sides. For a spiral bevel gear with shaft angle Σ=90°, pressure angle αn=20°, and spiral angle βm=35°, the
Changes in the rotational direction of the driving gear alter the Driving Gear Note 1 Driving Gear (RH Spiral) Driving Gear (LH Spiral) tables below show the axial thrust force Fx and the radial force Fr when a tangential force Ft of 100
contact surface accordingly. The illustrations show the top view units is applied at the center of face width. For details, please refer to separate technical reference
RH Rotation
Bevel

Bevel
of RH and LH Spiral Gears, and the tables on the right explain the Convex Surface Concave Surface book, section of “Features of Tooth Surface Contact” (Page 107).
(Clockwise)
different contact surface depending on the situation.
LH rotation
Concave Surface Convex Surface
Concave surface (counterclockwise) Axial Thrust Force Fx
The tables show the values of
Radial Force Fr
Other

Other
LH Spiral as a driving gear （1）Forces acting upon pinion （2）Forces acting upon gear

Rotating Direction of Contact Surface Contact Gear Ratio　z2/z1 Contact Gear Ratio　z2/z1
Driving Gear Note 1 Surface Surface
Tooth Tooth Driving Gear (LH Spiral) Driving Gear (RH Spiral) 1.0 1.5 2.0 2.5 3.0 4.0 5.0 1.0 1.5 2.0 2.5 3.0 4.0 5.0
Convex surface
RH spiral LH spiral
RH Rotation Concave 80.9 82.9 82.5 81.5 80.5 78.7 77.4 Concave 80.9 75.8 71.1 67.3 64.3 60.1 57.3
Concave Surface Convex Surface
(Clockwise) Surface － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8 Surface － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9

LH Rotation Convex － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9 Convex － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8
Convex Surface Concave Surface
(Counterclockwise) Surface 80.9 75.8 71.1 67.3 64.3 60.1 57.3 Surface 80.9 82.9 82.5 81.5 80.5 78.7 77.4

〔Note 1〕Rotation directions given in the tables are for viewing the
gears from the hub side.
312 Inquiries are now being accepted on our website. 313
 MBSA・MBSB Module 2 ～ 6 MBSA・MBSB
Finished Bore Spiral Bevel Gears Finished Bore Spiral Bevel Gears
Specifications
E J
K
Precision grade JIS B 1704 : 1978 grade 4 F
G
Gear teeth Gleason J H J
K

E
G

G
Pressure angle 20°

F
Gears

Gears
E
I

G
Spur

Spur
G
H

F
Helix angle 35°

G
16
I

L
K

D
SCM415

A
B
C
Material G L A A G
B L
Heat treatment Overall carburizing
C C
Tooth hardness 55 ～ 60HRC D
Helical

Helical
Gears

Gears
BK B4 B7

No. of Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Keyway Set Screw Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth of spiral
Shape Catalog No.
AH7 B C D E F G H I J K Width×Depth Size L Bending strength Surface durability Bending strength Surface durability (mm) (kg)

MBSA2-3020R 20 6 x 2.8 2-M5 0.26 MBSA2-3020R

Internal

Internal
m2 30 R B4 40 60 61.36 40 26.8 21.02 14 23 11 37.56 7 34.4 38.4 3.51 3.91
Gears

Gears
MBSB2-3020R 22 6 x 2.8 2-M5 0.24 MBSB2-3020R
0.06~0.16
MBSA2-2030L 15 5 x 2.3 2-M4 0.14 MBSA2-2030L
m2 20 L BK 35 40 43.49 45 24.96 16.16 13.33 23 11 24.34 6.5 23.5 25.6 2.39 2.61
MBSB2-2030L 18 6 x 2.8 2-M5 0.13 MBSB2-2030L
MBSA2.5-3020R 22 6 x 2.8 2-M5 0.52 MBSA2.5-3020R
m2.5 30 R B4 48 75 76.74 50 33.6 26.31 18 30 14 48.01 9 68.0 76.8 6.93 7.84
MBSB2.5-3020R 25 8 x 3.3 2-M6 0.49 MBSB2.5-3020R
0.07~0.17
Racks

Racks
MBSA2.5-2030L 18 6 x 2.8 2-M5 0.26 MBSA2.5-2030L
m2.5 20 L BK 43 50 54.43 55 30.08 18.98 15.17 28 14 31.02 7.5 46.4 51.2 4.73 5.22
MBSB2.5-2030L 20 6 x 2.8 2-M5 0.25 MBSB2.5-2030L
MBSA3-3020R 25 8 x 3.3 2-M6 0.96 MBSA3-3020R
m3 30 R B4 60 90 92.21 60 40.34 31.66 21 36 17 57.14 11 118 135 12.1 13.8
MBSB3-3020R 30 8 x 3.3 2-M6 0.90 MBSB3-3020R
0.08~0.18
CP Racks

CP Racks
MBSA3-2030L MBSA3-2030L
& Pinions

& Pinions
22 6 x 2.8 2-M5 0.46
1.5 m3 20 L BK 53 60 65.58 65 35.17 21.86 17.67 32.5 17 36.2 9 80.7 90.1 8.23 9.19
MBSB3-2030L 25 8 x 3.3 2-M6 0.43 MBSB3-2030L
MBSA4-3020R 35 10 x 3.3 2-M8 1.77 MBSA4-3020R
m4 30 R B4 75 120 122.91 70 43.99 32.18 21 39 23 76.72 10 283 328 28.9 33.5
MBSB4-3020R 40 12 x 3.3 2-M8 1.68 MBSB4-3020R
0.12~0.27
MBSA4-2030L 30 8 x 3.3 2-M6 1.03 MBSA4-2030L
m4 20 L BK 70 80 87.34 85 45.53 27.45 21.67 42 23 48.07 11 193 219 19.7 22.3
MBSB4-2030L 35 10 x 3.3 2-M8 0.95 MBSB4-2030L
Gears

Gears
MBSA5-3020R m5 30 R B7 80 ― 150 ― 70 35.53 23.8 ― 31 28 97.36 ― 6-M10 110 544 637 55.4 64.9 2.80 MBSA5-3020R
Miter

Miter
MBSA5-2030L 35 10 x 3.3 2-M8 0.14~0.34 2.01 MBSA5-2030L
m5 20 L BK 87 100 109.2 105 55.05 33.07 25.67 51 28 62.04 13 371 425 37.8 43.3
MBSB5-2030L 40 12 x 3.3 2-M8 1.89 MBSB5-2030L
MBSA6-3020R m6 30 R B7 90 ― 180 ― 80 38.86 24.37 ― 33 34 115.61 ― 6-M10 120 927 1120 94.6 114 4.55 MBSA6-3020R
MBSA6-2030L 45 14 x 3.8 2-M10 0.16~0.36 3.56 MBSA6-2030L
m6 20 L BK 105 120 130.48 125 65.57 38.49 30 60 34 72.41 15 633 745 64.5 76.0
MBSB6-2030L 50 14 x 3.8 2-M10 3.38 MBSB6-2030L
Gears

Gears
Bevel

Bevel
MBSA2-4020R 20 6 x 2.8 2-M5 0.53 MBSA2-4020R
m2 40 R B4 45 80 81.06 45 31.83 26.06 18 29 14 52.7 9 59.6 69.6 6.08 7.09
MBSB2-4020R 22 6 x 2.8 2-M5 0.51 MBSB2-4020R
0.06~0.16
MBSA2-2040L 15 5 x 2.3 2-M4 0.16 MBSA2-2040L
m2 20 L BK 35 40 44.2 55 28.16 16.05 13.75 27 14 25.39 7 29.9 34.8 3.05 3.55
MBSB2-2040L 18 6 x 2.8 2-M5 0.14 MBSB2-2040L
MBSA2.5-4020R 25 8 x 3.3 2-M6 0.93 MBSA2.5-4020R
Screw

Screw
Gears

Gears
m2.5 40 R B4 55 100 101.29 50 33.35 26.29 16 30 17 66.99 8 114 135 11.7 13.8
MBSB2.5-4020R 28 8 x 3.3 2-M6 0.90 MBSB2.5-4020R
0.07~0.17
MBSA2.5-2040L 20 6 x 2.8 2-M5 0.26 MBSA2.5-2040L
m2.5 20 L BK 43 50 55.12 65 31.01 16.28 13.25 29 17 29.97 7 57.3 67.6 5.84 6.89
MBSB2.5-2040L 22 6 x 2.8 2-M5 0.25 MBSB2.5-2040L
MBSA3-4020R 30 8 x 3.3 2-M6 1.47 MBSA3-4020R
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

m3 40 R B4 65 120 121.57 60 39.81 31.57 21 35 20 80.28 11 195 233 19.9 23.7
MBSB3-4020R 35 10 x 3.3 2-M8 1.40 MBSB3-4020R
Worm

Worm
0.08~0.18
MBSA3-2040L 2 22 6 x 2.8 2-M5 0.51 MBSA3-2040L
m3 20 L BK 53 60 66.03 80 38.9 21.51 18.25 36.5 20 36.56 9.5 97.7 116 9.97 11.9
MBSB3-2040L 25 8 x 3.3 2-M6 0.48 MBSB3-2040L
MBSA4-4020R m4 40 R B7 80 ― 160 ― 60 32.08 22.53 ― 28 27 107.63 ― 6-M10 110 466 564 47.5 57.5 3.11 MBSA4-4020R
MBSA4-2040L 30 8 x 3.3 2-M6 0.12~0.27 1.05 MBSA4-2040L
m4 20 L BK 70 80 88.46 100 45.38 22.12 17.5 43 27 51.25 9 234 282 23.8 28.8
MBSB4-2040L 35 10 x 3.3 2-M8 0.96 MBSB4-2040L
Bevel

Bevel
MBSA5-4020R m5 40 R B7 90 ― 200 ― 70 35.2 22.98 ― 30 34 133.97 ― 6-M10 120 915 1120 93.3 114 5.59 MBSA5-4020R
MBSA5-2040L 40 12 x 3.3 2-M8 0.14~0.34 1.96 MBSA5-2040L
m5 20 L BK 87 100 109.91 125 57.11 27.48 21.75 53.5 34 61.95 11 458 559 46.7 57.0
MBSB5-2040L 45 14 x 3.8 2-M10 1.82 MBSB5-2040L
MBSA6-4020R m6 40 R B7 110 ― 240 ― 80 37.89 23.62 ― 32 40 162.56 ― 6-M10 140 1530 1920 156 196 8.48 MBSA6-4020R
MBSA6-2040L 50 14 x 3.8 2-M10 0.16~0.36 3.33 MBSA6-2040L
Other

Other
m6 20 L BK 105 120 132.04 150 67.8 33.01 26.25 64 40 77.11 14 766 961 78.1 97.9
MBSB6-2040L 55 16 x 4.3 2-M10 3.11 MBSB6-2040L
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please
see page 303 for more details. When installing B7 type (ring type) Spiral Bevel Taper pin
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- Gears to the base, always secure the gears onto
ferences will occur due to the corner chamfering of the gear tips. the mounting base with taper pins to absorb
③ These gears produce axial thrust forces. See Page 304 for more details.
the rotational loads. Fastening and securing Gear
④ Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the
effects of heat treatment. with only mounting screws could possibly
⑤ For products having a tapped hole (Except for B7-shaped products), a set screw is attached as an accessory. cause the screws to snap due to heavy loads.
Mounting base
[Caution on Secondary Operations] ① These products which are hardened by carburizing allow no secondary machining. However, for B7 type gears, the area
surrounded with line (in the illustration) is masked during the carburization process and can be modified. Care
should be exercised since the hardness is high (approx. HRC40, maximum).

314 Inquiries are now being accepted on our website. 315

 MBSA・MBSB Module 2 ～ 6 MBSA・MBSB
Finished Bore Spiral Bevel Gears Finished Bore Spiral Bevel Gears
Specifications
E E J
F K
Precision grade JIS B 1704 : 1978 grade 4 F
G G
Gear teeth Gleason J H J H J
K

E
G

G
Pressure angle 20°

F
Gears

Gears
E
I

G
Spur

Spur
G
H

F
Helix angle 35°

G
16
I I

L
K

D
SCM415

A
B
C

A
B
C
K
Material G L G A A G
L
B L
Heat treatment Overall carburizing
C C
Tooth hardness 55 ～ 60HRC D
Helical

Helical
Gears

Gears
BK BT B4 B7

No. of Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Keyway Set Screw Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth of spiral
Shape Catalog No.
AH7 B C D E F G H I J K Width×Depth Size L Bending strength Surface durability Bending strength Surface durability (mm) (kg)

MBSA2-4518R 20 6 x 2.8 2-M5 0.60 MBSA2-4518R

Internal

Internal
m2 45 R B4 48 90 90.79 40 27.67 22.98 15 25 14 62.24 8 69.3 74.3 7.06 7.58
Gears

Gears
MBSB2-4518R 25 8 x 3.3 2-M6 0.56 MBSB2-4518R
0.06~0.16
MBSA2-1845L 12 4 x 1.8 2-M4 0.14 MBSA2-1845L
m2 18 L BK 32 36 40.42 60 28.54 15.88 14.2 27.5 14 23.11 7 27.2 29.7 2.77 3.03
MBSB2-1845L 16 5 x 2.3 2-M4 0.12 MBSB2-1845L
MBSA2.5-4518R 25 8 x 3.3 2-M6 1.09 MBSA2.5-4518R
m2.5 45 R B4 55 112.5 113.49 50 34.94 28.74 19 31 18 76.53 10 138 150 14.1 15.3
MBSB2.5-4518R 30 8 x 3.3 2-M6 1.04 MBSB2.5-4518R
0.07~0.17
Racks

Racks
MBSA2.5-1845L 15 5 x 2.3 2-M4 0.26 MBSA2.5-1845L
m2.5 18 L BK 40 45 50.35 72 33.19 16.82 14.75 31.5 18 26.82 8 54.1 59.9 5.52 6.11
MBSB2.5-1845L 20 6 x 2.8 2-M5 0.22 MBSB2.5-1845L
MBSA3-4518R 30 8 x 3.3 2-M6 1.92 MBSA3-4518R
m3 45 R B4 65 135 136.24 60 41.65 34.55 22 37 21 92.96 11 234 256 23.8 26.1
MBSB3-4518R 35 10 x 3.3 2-M8 1.84 MBSB3-4518R
0.08~0.18
CP Racks

CP Racks
MBSA3-1845L MBSA3-1845L
& Pinions

& Pinions
2.5 20 6 x 2.8 2-M5 0.41
m3 18 L BK 48 54 60.69 85 37.82 18.84 16.3 36 21 33.41 9 91.8 103 9.36 10.5
MBSB3-1845L 25 8 x 3.3 2-M6 0.36 MBSB3-1845L
MBSA4-4518R m4 45 R B7 80 ― 180 ― 55 29.77 21.25 ― 25 29 122.33 ― 6-M10 110 567 630 57.8 64.3 3.92 MBSA4-4518R
MBSA4-1845L 28 8 x 3.3 2-M6 0.12~0.27 0.89 MBSA4-1845L
m4 18 L BK 63 72 80.86 110 48.03 21.77 18.2 46 29 45.83 10 223 252 22.7 25.7
MBSB4-1845L 32 10 x 3.3 2-M8 0.82 MBSB4-1845L
MBSA5-4518R m5 45 R B7 100 ― 225 ― 65 33.37 22.82 ― 28 36 153.85 ― 6-M10 130 1100 1240 112 126 6.82 MBSA5-4518R
Gears

Gears
MBSA5-1845L 10 x 3.3 2-M8 0.14~0.34 MBSA5-1845L
Miter

35 1.68

Miter
m5 18 L BK 80 90 101.07 135 57.3 24.71 20.5 54.5 36 56.13 11 433 495 44.2 50.5
MBSB5-1845L 42 12 x 3.3 2-M8 1.50 MBSB5-1845L
MBSA6-4518R m6 45 R B7 110 ― 270 ― 75 36.97 24.19 ― 30 43 184.57 ― 6-M10 140 1860 2150 190 219 11.1 MBSA6-4518R
MBSA6-1845L 45 14 x 3.8 2-M10 0.16~0.36 2.66 MBSA6-1845L
m6 18 L BK 95 108 120.55 160 66.73 27.51 22.4 63 43 66.44 12 731 859 74.6 87.6
MBSB6-1845L 50 14 x 3.8 2-M10 2.48 MBSB6-1845L
Gears

Gears
Bevel

Bevel
MBSA2-4515R 20 6 x 2.8 2-M5 0.61 MBSA2-4515R
m2 45 R B4 48 90 90.66 40 30.01 25.99 18 27 14 61.82 9 67.8 61.3 6.91 6.25
MBSB2-4515R 22 6 x 2.8 2-M5 0.60 MBSB2-4515R
0.06~0.16
MBSA2-1545L BT 10 ― 2-M4 0.081 MBSA2-1545L
m2 15 L 26 30 34.59 55 23.78 10.77 9.33 22.5 14 16.46 5 21.7 20.4 2.22 2.08
MBSB2-1545L BK 12 4 x 1.8 2-M4 0.073 MBSB2-1545L
MBSA2.5-4515R 22 6 x 2.8 2-M5 1.01 MBSA2.5-4515R
m2.5 45 R B4 55 112.5 113.28 45 32.43 27.42 18 28 17 77.83 9 130 119 13.3 12.1
MBSB2.5-4515R 25 8 x 3.3 2-M6 0.98 MBSB2.5-4515R
Screw

Screw
Gears

Gears
0.07~0.17
MBSA2.5-1545L 12 4 x 1.8 2-M4 0.16 MBSA2.5-1545L
m2.5 15 L BK 32 37.5 43.06 70 30.51 14.68 12.84 29 17 21.48 7 41.6 39.6 4.24 4.04
MBSB2.5-1545L 15 5 x 2.3 2-M4 0.15 MBSB2.5-1545L
MBSA3-4515R 30 8 x 3.3 2-M6 1.78 MBSA3-4515R
m3 45 R B4 65 135 136.03 55 39.94 34.05 22 35 21 92.39 11 229 211 23.3 21.6
MBSB3-4515R 32 10 x 3.3 2-M8 1.75 MBSB3-4515R
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

0.08~0.18
MBSA3-1545L 3 18 6 x 2.8 2-M5 0.26 MBSA3-1545L
Worm

Worm
m3 15 L BK 38 45 52 85 38.12 18.67 16.33 36.5 21 26.18 9 73.3 70.5 7.48 7.18
MBSB3-1545L 20 6 x 2.8 2-M5 0.24 MBSB3-1545L
MBSA4-4515R m4 45 R B7 80 ― 180 ― 50 28.85 22.14 ― 25 28 124.3 ― 6-M10 110 542 508 55.3 51.8 3.93 MBSA4-4515R
MBSA4-1545L 22 6 x 2.8 2-M5 0.12~0.27 0.63 MBSA4-1545L
m4 15 L BK 52 60 69.24 110 47.51 21.54 18.67 45.5 28 35.91 10 174 169 17.7 17.3
MBSB4-1545L 25 8 x 3.3 2-M6 0.58 MBSB4-1545L
MBSA5-4515R m5 45 R B7 90 ― 225 ― 60 33.57 25.16 ― 28 35 154.88 ― 6-M10 120 1060 1000 108 102 7.38 MBSA5-4515R
Bevel

Bevel
MBSA5-1545L 28 8 x 3.3 2-M6 0.14~0.34 1.16 MBSA5-1545L
m5 15 L BK 65 75 86.55 135 56.89 24.43 20.83 54 35 42.64 11 339 334 34.6 34.1
MBSB5-1545L 32 10 x 3.3 2-M8 1.07 MBSB5-1545L
MBSA6-4515R m6 45 R B7 110 ― 270 ― 70 38.28 28.05 ― 32 42 186.12 ― 6-M10 140 1790 1740 183 178 12.0 MBSA6-4515R
MBSA6-1545L 35 10 x 3.3 2-M8 0.16~0.36 1.90 MBSA6-1545L
m6 15 L BK 78 90 103.13 160 66.39 27.19 23 63 42 52.37 12 575 581 58.6 59.3
MBSB6-1545L 40 12 x 3.3 2-M8 1.75 MBSB6-1545L
Other

Other
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please When installing B7 type (ring type) Spiral Bevel
see page 303 for more details. Gears to the base, always secure the gears onto Taper pin
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif-
the mounting base with taper pins to absorb
ferences will occur due to the corner chamfering of the gear tips.
③ These gears produce axial thrust forces. See Page 304 for more details. the rotational loads. Fastening and securing
Gear
④ Although the dimensions of the keyway are made to the JIS (Js9) tolerance, there may be some deviations due to the with only mounting screws could possibly
effects of heat treatment. cause the screws to snap due to heavy loads.
⑤ For products having a tapped hole (Except for B7-shaped products), a set screw is attached as an accessory.
Mounting base
[Caution on Secondary Operations] ① These products which are hardened by carburizing allow no secondary machining. However, for B7 type gears, the area
surrounded with line (in the illustration) is masked during the carburization. process and can be modified. Care
should be exercised since the hardness is high (approx. HRC40, maximum).

316 Inquiries are now being accepted on our website. 317

 SBS Module 1 ～ 5 SBS
Spiral Bevel Gears Spiral Bevel Gears
Specifications
E K
Precision grade JIS B 1704 : 1978 grade 4 F
B J
G J
Gear teeth Gleason J H K FD

Pressure angle 20°

E
E
Gears

Gears
Spur

Spur
F
I

I
35° FD

G
Helix angle

G
H

H
D
S45C

A
B
C
Material
A A
Heat treatment Teeth induction hardened B B
C C
Tooth hardness 50 ～ 60HRC D D
Helical

Helical
Gears

Gears
B3 B4 B5
Surface treatment Black oxide coating
＊ FD has die-forged finish.

Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module No. of teeth
of spiral
Shape Catalog No.
A B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SBS2-3020R 30 R B4 12 35 60 61.36 40 26.8 21.02 15 23 37.56 15.4 11.3 1.57 1.15 0.26 SBS2-3020R
Internal

Internal
m2 11 0.06~0.16
Gears

Gears
SBS2-2030L 20 L B3 10 30 40 43.49 45 24.96 16.16 11.67 22 21.34 10.5 7.52 1.07 0.77 0.13 SBS2-2030L
SBS2.5-3020R 30 R B4 15 45 75 77.09 50 33.86 26.56 18 30 45.61 31.7 23.6 3.23 2.40 0.55 SBS2.5-3020R
m2.5 15 0.07~0.17
SBS2.5-2030L 20 L B3 12 40 50 54.43 55 30.88 18.98 14.17 28 27.42 21.6 15.7 2.20 1.60 0.28 SBS2.5-2030L
SBS3-3020R 30 R B4 16 50 90 92.21 55 35.34 26.66 17 31 57.14 52.9 39.7 5.39 4.05 0.82 SBS3-3020R
1.5 m3 17 0.08~0.18
SBS3-2030L 20 L B3 16 45 60 65.58 70 40.17 26.86 20 37 34.71 36.1 26.5 3.68 2.70 0.49 SBS3-2030L
Racks

Racks
SBS4-3020R 30 R B4 20 70 120 122.85 75 47.49 37.14 25 40 78.59 115 88.1 11.8 8.99 1.90 SBS4-3020R
m4 20 0.12~0.27
SBS4-2030L 20 L B3 20 60 80 87.34 90 48.17 32.45 23.33 43 46.89 78.7 58.8 8.03 5.99 1.05 SBS4-2030L
SBS5-3020R 30 R B4 25 90 150 153.67 90 58.08 42.75 24 50 91.22 253 195 25.8 19.9 4.11 SBS5-3020R
m5 30 0.14~0.34
SBS5-2030L 20 L B3 22 80 100 109.2 110 61.62 38.07 28.33 56 54.83 173 130 17.6 13.3 2.29 SBS5-2030L
CP Racks

CP Racks
& Pinions

& Pinions
SBS1-4020R 40 R B4 8 25 40 40.52 22 15.02 12.52 8 12 26.58 3.01 2.22 0.31 0.23 0.068 SBS1-4020R
m1 6 0.03~0.13
SBS1-2040L 20 L B3 6 16 20 22.08 28 13.73 8.52 7 12 9.17 1.51 1.11 0.15 0.11 0.019 SBS1-2040L
SBS1.5-4020R 40 R B4 10 38 60 60.75 35 24.93 20.75 15 22 39.64 10.9 8.22 1.11 0.84 0.27 SBS1.5-4020R
m1.5 10 0.05~0.15
SBS1.5-2040L 20 L B3 8 25 30 33.08 46 25.45 16.77 14.75 24 17.28 5.46 4.11 0.56 0.42 0.088 SBS1.5-2040L
SBS2-4020R 40 R B4 12 40 80 81 45 32.27 26 18 27 48.46 27.8 21.3 2.83 2.17 0.51 SBS2-4020R
m2 15 0.06~0.16
SBS2-2040L 20 L B3 12 32 40 44.1 60 34.04 21.02 18 32 20.92 13.9 10.7 1.42 1.09 0.19 SBS2-2040L
Gears

Gears
Miter

Miter
SBS2.5-4020R 40 R B4 15 50 100 101.27 55 39.65 31.27 20 34 59.28 56.4 43.7 5.75 4.46 1.06 SBS2.5-4020R
2 m2.5 20 0.07~0.17
SBS2.5-2040L 20 L B3 12 40 50 55.2 75 43.61 26.30 22.5 40 20.56 28.2 21.9 2.88 2.23 0.40 SBS2.5-2040L
SBS3-4020R 40 R B4 20 60 120 121.48 65 45.76 36.47 24 38 73.81 92.5 72.6 9.44 7.40 1.67 SBS3-4020R
m3 22 0.08~0.18
SBS3-2040L 20 L B3 16 50 60 66.07 90 50.63 31.52 27.5 47 29.61 46.4 36.3 4.73 3.70 0.69 SBS3-2040L
Gears

Gears
SBS4-4020R 40 R B4 20 70 160 162.07 80 53.69 42.07 28 45 102.39 213 170 21.7 17.3 3.33 SBS4-4020R
Bevel

Bevel
m4 28 0.12~0.27
SBS4-2040L 20 L B3 20 60 80 88.50 120 66.24 42.12 35 62 42.78 107 84.8 10.9 8.65 1.46 SBS4-2040L
SBS5-4020R 40 R B5 25 100 200 202.54 90 55.02 42.54 26 50 138.92 376 302 38.3 30.8 5.67 SBS5-4020R
m5 30 0.14~0.34
SBS5-2040L 20 L B3 22 80 100 110.45 140 68.48 42.61 35 63 57.84 188 151 19.2 15.4 2.61 SBS5-2040L
SBS2.5-3618R 36 R B4 15 55 90 91.29 43 28.38 21.79 13 24 57.72 41.7 29.3 4.26 2.99 0.72 SBS2.5-3618R
m2.5 16 0.07~0.17
Screw

Screw
Gears

Gears
SBS2.5-1836L 18 L B3 12 38 45 50.30 64 34.06 20.32 17.25 32 25.45 20.9 14.7 2.13 1.49 0.27 SBS2.5-1836L
SBS3-3618R 36 R B4 20 60 108 109.53 52 34.82 26.53 17 30 68.27 74.0 52.4 7.54 5.35 1.15 SBS3-3618R
2 m3 20 0.08~0.18
SBS3-1836L 18 L B3 16 46 54 60.28 75 39.78 22.57 19 37 28.56 37.0 26.2 3.78 2.67 0.44 SBS3-1836L
SBS4-3618R 36 R B4 20 70 144 145.99 72 48.84 37.99 25 42 91.87 173 124 17.6 12.7 2.65 SBS4-3618R
m4 26 0.12~0.27
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

SBS4-1836L 18 L B3 20 60 72 80.19 100 52.51 30.05 25 49 39.72 86.4 62.1 8.81 6.33 1.03 SBS4-1836L
Worm

Worm
SBS2-4518R 45 R B4 12 48 90 90.79 40 27.67 22.98 15 25 62.24 31.0 21.9 3.16 2.23 0.65 SBS2-4518R
m2 14 0.06~0.16
SBS2-1845L 18 L B3 10 32 36 40.42 60 28.54 15.88 14.2 27.5 23.11 12.2 8.74 1.24 0.89 0.15 SBS2-1845L
SBS2.5-4518R 45 R B4 15 55 112.5 113.49 50 34.94 28.74 18 31 76.53 61.6 44.0 6.28 4.49 1.23 SBS2.5-4518R
m2.5 18 0.07~0.17
SBS2.5-1845L 18 L B3 12 40 45 50.35 72 33.19 16.82 14.75 31.5 26.82 24.2 17.6 2.47 1.80 0.28 SBS2.5-1845L
SBS3-4518R 45 R B4 20 65 135 136.24 60 41.65 34.55 22 37 92.96 104 75.4 10.7 7.69 2.05 SBS3-4518R
2.5 m3 21 0.08~0.18
Bevel

Bevel
SBS3-1845L 18 L B3 16 48 54 60.69 85 37.82 18.84 16.3 36 33.41 41.0 30.2 4.18 3.07 0.45 SBS3-1845L
SBS4-4518R 45 R B4 25 80 180 181.57 75 50.98 40.96 24 45 122.33 253 185 25.8 18.9 4.62 SBS4-4518R
m4 29 0.12~0.27
SBS4-1845L 18 L B3 20 62 72 80.86 110 48.03 21.77 18 46 45.83 99.5 74.1 10.2 7.56 1.00 SBS4-1845L
SBS5-4518R 45 R B4 30 100 225 225.81 90 57.9 46.01 28 51 156.56 474 350 48.4 35.7 8.11 SBS5-4518R
m5 34 0.14~0.34
SBS5-1845L 18 L B3 22 80 90 103.87 135 56.02 25.27 20.5 52.5 56.9 186 140 19.0 14.3 1.94 SBS5-1845L
Other

Other
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modification and/or secondary operations
see page 303 for more details. for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- ② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including
ferences will occur due to the corner chamfering of the gear tips. the bottom land (approx. 2 to 3 mm).
③ These gears produce axial thrust forces. See Page 304 for more details.
④ Due to heat treating, some deformation of the bore may occur. It may be necessary to ream the bore to bring it to the
stated dimensions.

318 Inquiries are now being accepted on our website. 319

 SBS Module 1.5 ～ 5 SBS
Spiral Bevel Gears Spiral Bevel Gears
Specifications
E K
Precision grade JIS B 1704 : 1978 grade 4 F
B J
G J
Gear teeth Gleason J H K FD

Pressure angle 20°

E
E
Gears

Gears
Spur

Spur
F
I

F
35° ＊

I
FD

G
Helix angle

G
H

H
D
S45C

A
B
C
Material
A A
Heat treatment Teeth induction hardened B B
C C
Tooth hardness 50 ～ 60HRC D D
Helical

Helical
Gears

Gears
B3 B4 B5
Surface treatment Black oxide coating
＊ FD has die-forged finish.
＊ 39̊ for 6015R and 1560L of SBS1.5/2 products.

Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module No. of teeth Shape Catalog No.
Internal

Internal
of spiral A B C D E F G H I J K (mm) (kg)
Gears

Gears
Bending strength Surface durability Bending strength Surface durability

SBS2-4515R 45 R B4 12 40 90 90.67 40 30.29 26.01 17 26 59.04 31.7 18.8 3.23 1.92 0.60 SBS2-4515R
m2 15 0.06~0.16
SBS2-1545L 15 L B3 10 24 30 34.78 60 29.66 15.80 14 29 19.13 10.1 6.27 1.03 0.64 0.095 SBS2-1545L
SBS2.5-4515R 45 R B4 15 50 112.5 113.32 50 38.25 32.47 22 35 72.82 64.3 38.7 6.56 3.94 1.21 SBS2.5-4515R
m2.5 20 0.07~0.17
SBS2.5-1545L 15 L B3 12 30 37.5 43.36 75 38.27 19.73 17.5 37 20.51 20.6 12.9 2.10 1.31 0.19 SBS2.5-1545L
SBS3-4515R 45 R B4 20 60 135 135.99 55 40.59 33.98 20 35 88.18 108 65.8 11.1 6.71 1.99 SBS3-4515R
Racks

Racks
3 m3 23 0.08~0.18
SBS3-1545L 15 L B3 15 38 45 52.08 90 44.98 23.68 21.33 44 28.54 34.7 21.9 3.54 2.24 0.34 SBS3-1545L
SBS4-4515R 45 R B5 20 80 180 181.3 70 50.62 41.95 24 45 118.08 253 156 25.8 15.9 4.04 SBS4-4515R
m4 30 0.12~0.27
SBS4-1545L 15 L B3 16 50 60 69.30 115 54.37 26.55 23.33 52 32.26 81.1 52.0 8.27 5.30 0.76 SBS4-1545L
SBS5-4515R 45 R B5 30 90 225 226.61 75 50.05 39.92 20 44 152.88 473 295 48.3 30.0 6.08 SBS5-4515R
CP Racks

CP Racks
& Pinions

& Pinions
m5 35 0.14~0.34
SBS5-1545L 15 L B3 20 60 75 86.55 145 66.89 34.43 30 65 48.64 152 98.2 15.5 10.0 1.44 SBS5-1545L
SBS1.5-6015R 60 R B4 12 60 90 90.36 32 24.08 21.48 12 21 65.39 17.9 12.9 1.83 1.31 0.70 SBS1.5-6015R
m1.5 12 0.05~0.15
SBS1.5-1560L 15 L B3 8 18 22.5 26.09 56 22.95 11.45 10.43 22.5 15.55 4.22 3.21 0.43 0.33 0.042 SBS1.5-1560L
SBS2-6015R 60 R B4 15 80 120 120.46 42 31.5 27.91 16 27 87.02 42.5 30.9 4.33 3.15 1.59 SBS2-6015R
m2 16 0.06~0.16
SBS2-1560L 15 L B3 10 24 30 34.68 75 30.94 15.58 14.25 30 18.06 10.0 7.73 1.02 0.79 0.10 SBS2-1560L
4
Gears

Gears
SBS2.5-6015R 60 R B4 20 100 150 150.5 53 39.68 35.24 20 34 108.64 96.1 58.4 9.79 5.95 3.13 SBS2.5-6015R
Miter

Miter
m2.5 20 0.07~0.17
SBS2.5-1560L 15 L B3 12 30 37.5 44.16 94 38.9 19.83 18.06 37.5 20.58 22.6 14.6 2.31 1.49 0.20 SBS2.5-1560L
SBS3-6015R 60 R B4 20 120 180 180.57 64 47.61 42.64 25 41 134.4 156 95.7 15.9 9.76 5.38 SBS3-6015R
m3 22 0.08~0.18
SBS3-1560L 15 L B3 15 38 45 52.64 112 44.01 22.96 21.12 43 31.58 36.8 23.9 3.75 2.44 0.35 SBS3-1560L
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modification and/or secondary operations
Gears

Gears
Bevel

Bevel
see page 303 for more details. for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of KHK stock gears is also available.
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- ② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including
ferences will occur due to the corner chamfering of the gear tips. the bottom land (approx. 2 to 3 mm).
③ These gears produce axial thrust forces. See Page 304 for more details.
④ Due to heat treating, some deformation of the bore may occur. It may be necessary to ream the bore to bring it to the
stated dimensions.
Screw

Screw
Gears

Gears
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Worm

Worm
■ Contact Surface of Spiral Bevel Gears RH Spiral as a driving gear ■ Forces Acting on Spiral Bevel Gear Teeth
Rotating Direction of Contact Surface
Tooth surfaces of spiral gears have concave and convex sides. For a spiral bevel gear with shaft angle Σ=90°, pressure angle αn=20°, and spiral angle βm=35°, the
Changes in the rotational direction of the driving gear alter the Driving Gear Note 1 Driving Gear (RH Spiral) Driving Gear (LH Spiral) tables below show the axial thrust force Fx and the radial force Fr when a tangential force Ft of 100
contact surface accordingly. The illustrations show the top view units is applied at the center of face width. For details, please refer to separate technical reference
RH Rotation
Bevel

Bevel
of RH and LH Spiral Gears, and the tables on the right explain the Convex Surface Concave Surface book, section of “Features of Tooth Surface Contact” (Page 107).
(Clockwise)
different contact surface depending on the situation.
LH rotation
Concave Surface Convex Surface
Concave surface (counterclockwise) Axial Thrust Force Fx
The tables show the values of
Radial Force Fr
Other

Other
LH Spiral as a driving gear （1）Forces acting upon pinion （2）Forces acting upon gear

Rotating Direction of Contact Surface Contact Gear Ratio　z2/z1 Contact Gear Ratio　z2/z1
Driving Gear Note 1 Surface Surface
Tooth Tooth Driving Gear (LH Spiral) Driving Gear (RH Spiral) 1.0 1.5 2.0 2.5 3.0 4.0 5.0 1.0 1.5 2.0 2.5 3.0 4.0 5.0
Convex surface
RH spiral LH spiral
RH Rotation Concave 80.9 82.9 82.5 81.5 80.5 78.7 77.4 Concave 80.9 75.8 71.1 67.3 64.3 60.1 57.3
Concave Surface Convex Surface
(Clockwise) Surface － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8 Surface － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9

LH Rotation Convex － 18.1 － 33.6 － 42.8 － 48.5 － 52.4 － 57.2 － 59.9 Convex － 18.1 － 1.9 8.4 15.2 20.0 26.1 29.8
Convex Surface Concave Surface
(Counterclockwise) Surface 80.9 75.8 71.1 67.3 64.3 60.1 57.3 Surface 80.9 82.9 82.5 81.5 80.5 78.7 77.4

〔Note 1〕Rotation directions given in the tables are for viewing the
gears from the hub side.
320 Inquiries are now being accepted on our website. 321
 SBZG Module 2 ～ 3 SBZG
Ground Zerol Bevel Gears Ground Zerol Bevel Gears
E
Specifications F
G J
Precision grade JIS B 1704 : 1978 grade 2
K
J H
Gear teeth Gleason G
G

E
Pressure angle 20°
Gears

Gears
Spur

Spur
F
I

G
I
Material S45C

H
D
K

A
B
C
Heat treatment Teeth induction hardened
A
Tooth hardness 50 ～ 60HRC
B
Surface treatment Black oxide coated except for ground part C
Helical

Helical
Gears

Gears
B3 D B4

No. of Helix Direction Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth angle of spiral
Shape Catalog No.
A B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SBZG2-3020R 30 R B4 10 35 60 62.16 40 26.48 21.62 15 23 11 37.56 14.3 8.88 1.46 0.91 0.27 SBZG2-3020R
Internal

Internal
m2 7° 0.05~0.11
Gears

Gears
SBZG2-2030L 20 L B3 10 30 40 44.18 45 25.05 16.39 11.67 22 11 21.34 9.89 5.92 1.01 0.60 0.14 SBZG2-2030L
SBZG2.5-3020R 30 R B4 15 45 75 77.77 50 33.69 27.08 18 30 15 45.61 29.4 18.8 3.00 1.92 0.55 SBZG2.5-3020R
1.5 m2.5 7° 0.06~0.12
SBZG2.5-2030L 20 L B3 12 35 50 55.23 55 31.05 19.24 12.5 28 15 27.42 20.4 12.5 2.08 1.28 0.25 SBZG2.5-2030L
SBZG3-3020R 30 R B4 15 50 90 93.27 55 35.01 27.45 17 31 17 57.14 51.7 31.6 5.27 3.22 0.84 SBZG3-3020R
m3 7° 0.07~0.13
SBZG3-2030L 20 L B3 15 45 60 66.32 70 40.50 27.11 20 37 17 34.71 35.8 21.1 3.65 2.15 0.50 SBZG3-2030L
Racks

Racks
SBZG2-4020R 40 R B4 12 40 80 81.58 45 31.91 26.58 18 27 15 48.46 26.0 18.4 2.66 1.87 0.52 SBZG2-4020R
m2 9° 0.05~0.11
SBZG2-2040L 20 L B3 12 32 40 44.76 60 34.15 21.19 18 32 15 20.92 13.1 9.18 1.33 0.94 0.19 SBZG2-2040L
SBZG2.5-4020R 40 R B4 15 50 100 102.01 55 39.16 32.01 20 35 20 60.28 55.6 38.5 5.67 3.92 1.10 SBZG2.5-4020R
2 m2.5 9° 0.06~0.12
SBZG2.5-2040L 20 L B3 12 40 50 55.99 75 43.77 26.50 22.5 41 20 24.56 27.9 19.2 2.85 1.96 0.40 SBZG2.5-2040L
CP Racks

CP Racks
& Pinions

& Pinions
SBZG3-4020R 40 R B4 20 60 120 122.31 65 45.30 37.31 24 38 22 73.81 96.3 62.8 9.82 6.40 1.69 SBZG3-4020R
m3 9° 0.07~0.13
SBZG3-2040L 20 L B3 16 50 60 67.21 90 50.81 31.80 27.5 47 22 29.61 48.4 31.4 4.93 3.20 0.70 SBZG3-2040L
[Caution on Product Characteristics] ① Allowable torques shown in the table are the calculated values according to the assumed usage conditions. [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modification and/or secondary operations
Please see page 303 for more details. for safety concerns. KHK Quick-Mod Gears, the KHK’s system for quick modification of KHK stock gears is also available.
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some ② Due to the gear teeth being induction hardened, no secondary operations can be performed on tooth areas including
differences will occur due to the corner chamfering of the gear tips. the bottom land (approx. 2 to 3 mm).
Gears

Gears
Miter

Miter
③ It produces an axial thrust force, which has the same direction as straight bevel gears. For details, see separate technical
reference book (Page 108).

■ Features of Zerol Bevel Gears

Zerol Bevel Gears are spiral Bevel gears with a helix angle of less than 10 degree. Balanced,
Gears

Gears
Bevel

Bevel
and superior performance as they combine the features of straight and spiral bevel gears.
● Allows compact design as no inward thrust force ( ＊ Reference to the figure) is produced, ■ Zerol Bevel Gear Set Example
which causes problems when using spiral Bevel gears.
● Unlike straight Bevel gears, Zerol Bevel Gears can be ground finished, allowing higher
precision, wear-resistance and are quieter, compared with straight Bevel gears.
Screw

Screw
Gears

Gears
● Drop in replacement for SB Bevel Gears can easily be made due to the gears have similar
dimensions for the mounting distance. When replacing, please use a set of Zerol Bevel
gears with opposite spiral hands, one right-hand and the other left-hand.

■ Performance Comparison
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Worm

Worm
Interchangeability Precision Strength Durability Noise/Vibration Price
Gear Type Bearing Design ＊ Surface Roughness/Total
Mounting Distance JIS B 1704 : 1978 Bending Strength Surface Durability Contact Ratio for single item

○ ○△△ × △◎
Bevel Gears

Easy Many Normal Normal Bad Normal Low

Bevel

Bevel
No thrust force produced inward SUB、PB、SBZG grade 3 24.2N・ｍ /12.2N・ｍ 2.92N・ｍ /1.46N・ｍ 3.2a/1.63
SB2-4020/2040

○ ○○△○○△
Ground Zerol Bevel Gears
Other

Other
Easy Many Good Normal Good Low Normal

No thrust force produced inward SB、SUB、PB grade 2 26.0N・ｍ /13.1N・ｍ 18.4N・ｍ /9.18N・ｍ 0.4a/1.84
SBZG2-4020R/2040L

△ × ○○◎○△
Ground Spiral Bevel Gears

Difficult None Good Strong Good Low Normal

Thrust force produced inward ー grade 2 56.5N・ｍ /28.2N・ｍ 94.2N・ｍ /47.1N・ｍ 0.4a/3.13
MBSG2-4020R/2040L
NOTE: The above evaluations were based on a comparison of 3 products.

322 Inquiries are now being accepted on our website. 323

 SB・SBY Module 1 ～ 8 SB・SBY
Steel Bevel Gears Steel Bevel Gears
Specifications
E K
Precision grade JIS B 1704 : 1978 grade 3 F
B J
G J K
Gear teeth Gleason J H K FD L J

Pressure angle 20°

E
E
Gears

Gears
Spur

Spur
F
I

E
F

I
S45C FD

G
Material

F
G
H

H
―

D
K

A
B
C
Heat treatment
A A A
Tooth hardness (less than 194HB) B B B
C C C
Surface treatment Black oxide coating
D D D
Helical

Helical
Gears

Gears
B3 B4 B5 BT
＊ FD has die-forged finish.

No. of Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SB1.5-3020 30 B4 10 30 45 46.24 28 18.53 13.93 8 16 27.37 5.82 0.65 0.59 0.07 0.12 SB1.5-3020
Internal

Internal
m1.5 9 0.05~0.15
Gears

Gears
SB1.5-2030 20 B3 8 25 30 33.13 33 18.63 11.54 8.83 17 17.05 4.04 0.44 0.41 0.04 0.063 SB1.5-2030
SB2-3020 30 B4 10 35 60 61.65 40 26.87 21.24 15 23 37.56 13.1 1.52 1.33 0.16 0.26 SB2-3020
m2 11 0.06~0.16
SB2-2030 20 B3 10 30 40 44.18 45 25.06 16.39 11.67 22 21.34 9.07 1.01 0.92 0.10 0.14 SB2-2030
SB2.5-3020 30 B4 15 45 75 77.07 50 34.22 26.55 18 30 45.61 26.9 3.21 2.75 0.33 0.55 SB2.5-3020
m2.5 15 0.07~0.17
SB2.5-2030 20 B3 12 35 50 55.22 55 31.06 19.24 12.5 28 27.42 18.7 2.14 1.91 0.22 0.25 SB2.5-2030
1.5
Racks

Racks
SB3-3020 30 B4 15 50 90 92.48 55 35.56 26.86 17 31 57.14 44.9 5.45 4.58 0.56 0.83 SB3-3020
m3 17 0.08~0.18
SB3-2030 20 B3 15 45 60 66.27 70 40.48 27.09 20 37 34.71 31.2 3.63 3.18 0.37 0.50 SB3-2030
SB4-3020 30 B4 20 70 120 123.3 75 47.71 37.48 25 40 78.59 98.2 12.3 10.0 1.25 1.91 SB4-3020
m4 20 0.12~0.27
SB4-2030 20 B3 15 60 80 88.32 90 48.53 32.77 23.33 43 46.89 68.1 8.20 6.95 0.84 1.10 SB4-2030
CP Racks

CP Racks
SB5-3020
& Pinions

SB5-3020

& Pinions
30 B4 25 90 150 154.13 90 58.45 43.1 24 50 91.22 215 27.6 22.0 2.81 4.13
m5 30 0.14~0.34
SB5-2030 20 B3 20 80 100 110.45 110 62.11 38.48 28.33 56 54.83 150 18.4 15.3 1.87 2.34 SB5-2030
SB1.5-3015 30 B4 8 25 45 45.88 25 17.85 14.63 9 15 28.36 5.02 0.47 0.51 0.05 0.10 SB1.5-3015
m1.5 8 0.05~0.15
SB1.5-1530 15 B3 6 16 22.5 26.11 32 17.23 10.4 7.88 15.5 10.72 2.60 0.24 0.26 0.02 0.028 SB1.5-1530
SB2-3015 30 B4 10 30 60 61.17 31 21.6 17.17 10 18 37.4 12.1 1.18 1.24 0.12 0.21 SB2-3015
m2 11 0.06~0.16
SB2-1530 15 B3 8 22 30 34.81 40 20.59 11.2 8 19 16.81 6.28 0.59 0.64 0.06 0.064 SB2-1530
Gears

Gears
SB2.5-3015 30 B4 15 40 75 76.46 40 28.75 22.71 15 24 44.21 24.9 2.48 2.54 0.25 0.41 SB2.5-3015
Miter

Miter
m2.5 15 0.07~0.17
SB2.5-1530 15 B3 12 30 37.5 43.51 55 31.81 19 15.63 29 16.42 12.9 1.24 1.32 0.13 0.15 SB2.5-1530
SB3-3015 30 B4 16 50 90 91.76 50 37.31 29.26 18 30 47.78 45.6 4.60 4.65 0.47 0.83 SB3-3015
2 m3 20 0.08~0.18
SB3-1530 15 B3 12 35 45 52.22 70 43.88 26.8 22.5 41 19.56 23.6 2.30 2.41 0.23 0.31 SB3-1530
SB4-3015 30 B4 20 60 120 122.34 60 42.4 32.34 20 36 70.1 104 10.9 10.7 1.11 1.64 SB4-3015
m4 25 0.12~0.27
SB4-1530 15 B3 16 50 60 69.62 85 48.74 27.41 22.5 46 32.2 54.0 5.43 5.51 0.55 0.66 SB4-1530
Gears

Gears
Bevel

Bevel
SB5-3015 30 B5 20 70 150 152.93 75 52.5 40.43 25 48 90.41 199 21.3 20.3 2.17 2.72 SB5-3015
m5 30 0.14~0.34
SB5-1530 15 B3 20 60 75 87.03 110 63.61 38.01 31.25 58 32.83 103 10.6 10.5 1.09 1.28 SB5-1530
SB6-3015 30 B5 25 80 180 183.5 90 62.56 48.49 28 57 109.74 336 36.9 34.2 3.77 4.75 SB6-3015
m6 35 0.16~0.36
SB6-1530 15 B3 25 70 90 104.44 125 68.48 38.6 30 63 45.47 174 18.5 17.7 1.88 1.94 SB6-1530
SB2.5-3618 36 B4 15 55 90 91.46 43 28.52 21.96 13 24 57.72 35.9 4.08 3.66 0.42 0.72 SB2.5-3618
Screw

Screw
Gears

Gears
m2.5 16 0.07~0.17
SB2.5-1836 18 B3 12 38 45 51.01 64 34.27 20.5 17.25 32 25.44 18.1 2.04 1.84 0.21 0.27 SB2.5-1836
SB3-3618 36 B4 20 60 108 109.76 52 34.95 26.76 17 30 68.28 63.7 7.34 6.49 0.75 1.15 SB3-3618
2 m3 20 0.08~0.18
SB3-1836 18 B3 16 46 54 61.22 75 40.01 22.81 19 37 28.56 32.0 3.67 3.27 0.37 0.44 SB3-1836
SB4-3618 36 B4 20 70 144 146.34 72 49 38.34 25 42 91.86 149 17.7 15.2 1.80 2.66 SB4-3618
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

m4 26 0.12~0.27
SB4-1836 18 B3 20 60 72 81.62 100 52.77 30.41 25 49 39.72 74.8 8.85 7.62 0.90 1.04 SB4-1836
Worm

Worm
SB1-4020 40 B4 8 25 40 40.59 22 15.07 12.59 8 12 26.58 2.61 0.29 0.27 0.03 0.068 SB1-4020
m1 6 0.03~0.13
SB1-2040 20 B3 6 16 20 22.41 28 13.78 8.6 7 12 9.17 1.32 0.15 0.13 0.02 0.019 SB1-2040
SB1.25-4020 40 B4 10 32 50 50.73 27 18.54 15.23 10 16 33.61 5.33 0.61 0.54 0.06 0.14 SB1.25-4020
m1.25 8 0.04~0.14
SB1.25-2040 20 B3 8 22 25 28.01 36 18.66 11.75 10.25 17 13.22 2.69 0.31 0.27 0.03 0.046 SB1.25-2040
SB1.5-4020 40 B4 10 38 60 60.88 35 25.01 20.88 15 22 39.64 9.47 1.11 0.97 0.11 0.27 SB1.5-4020
m1.5 10 0.05~0.15
Bevel

Bevel
SB1.5-2040 20 B3 8 25 30 33.61 46 25.54 16.9 14.75 24 17.28 4.77 0.56 0.49 0.06 0.089 SB1.5-2040
SB2-4020 40 B4 12 40 80 81.17 45 32.37 26.17 18 27 48.46 24.2 2.92 2.46 0.30 0.51 SB2-4020
m2 15 0.06~0.16
SB2-2040 20 B3 12 32 40 44.81 60 34.16 21.2 18 32 20.92 12.2 1.46 1.24 0.15 0.19 SB2-2040
SB2.5-4020 40 B4 15 50 100 101.46 55 39.73 31.46 20 35 60.28 49.0 6.04 4.99 0.62 1.09 SB2.5-4020
m2.5 20 0.07~0.17
SB2.5-2040 20 B3 12 40 50 56.01 75 43.78 26.5 22.5 41 24.56 24.7 3.02 2.52 0.31 0.40 SB2.5-2040
2
Other

Other
SB3-4020 40 B4 20 60 120 121.76 65 45.85 36.76 24 38 73.81 80.4 10.1 8.20 1.03 1.68 SB3-4020
m3 22 0.08~0.18
SB3-2040 20 B3 16 50 60 67.22 90 50.81 31.8 27.5 47 29.61 40.5 5.06 4.13 0.52 0.70 SB3-2040
SB4-4020 40 B4 20 70 160 162.34 80 53.92 42.34 28 45 102.39 185 24.1 18.9 2.46 3.34 SB4-4020
m4 28 0.12~0.27
SB4-2040 20 B3 20 60 80 89.62 120 66.59 42.41 35 62 42.78 93.3 12.0 9.51 1.23 1.47 SB4-2040
SB5-4020 40 B5 25 100 200 202.93 90 55.33 42.93 26 50 138.92 327 43.9 33.3 4.47 5.63 SB5-4020
m5 30 0.14~0.34
SB5-2040 20 B3 20 80 100 112.03 140 68.92 43.01 35 63 57.84 165 21.9 16.8 2.24 2.67 SB5-2040
SB6-4020 40 B5 25 85 240 243.52 105 65.05 48.52 28 58 158.56 600 83.2 61.2 8.48 7.77 SB6-4020
m6 40 0.16~0.36
SB6-2040 20 B3 25 90 120 134.44 160 78.16 43.6 32.5 70 61.11 302 41.6 30.8 4.24 4.08 SB6-2040
SBY8-4020 40 BT 35 180 320 324.69 130 75.36 54.69 25 61 219.2 1350 196 138 20.0 25.75 SBY8-4020
m8 50 0.20~0.45
SBY8-2040 20 B3 30 120 160 179.25 210 98 54.81 40 90 96.39 679 98.1 69.3 10.0 9.41 SBY8-2040
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please see page 303 for more details. [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some differences will occur due to the corner chamfering of or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
the gear tips. KHK stock gears is also available.
③ For convenience in handling, BT Shaped Gears have tapped holes on their holding surface. To find the L dimensions and tap sizes, please refer to Page 304.

324 Inquiries are now being accepted on our website. 325

 SB・SBY Module 1 ～ 8 SB・SBY
Steel Bevel Gears Steel Bevel Gears
Specifications
E K
Precision grade JIS B 1704 : 1978 grade 3 F
B J
G J K
Gear teeth Gleason J H K FD L J

Pressure angle 20°

E
E
Gears

Gears
Spur

Spur
F
I

E
F

I
S45C FD

G
Material

F
G
H

H
―

D
K

A
B
C
Heat treatment
A A A
Tooth hardness (less than 194HB) B B B
C C C
Surface treatment Black oxide coating
D D D
Helical

Helical
Gears

Gears
B3 B4 B5 BT
＊ FD has die-forged finish.

No. of Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SB1-4518 45 B4 8 30 45 45.46 23 16.95 14.57 10 15 30.73 3.35 0.35 0.34 0.04 0.11 SB1-4518
Internal

Internal
m1 7 0.03~0.13
Gears

Gears
SB1-1845 18 B3 6 15 18 20.57 32 16.34 10.02 8.9 15.5 10.31 1.33 0.14 0.14 0.01 0.019 SB1-1845
SB1.25-4518 45 B4 10 34 56.25 56.82 26 18.53 15.46 10 16 37.86 6.67 0.72 0.68 0.07 0.17 SB1.25-4518
m1.25 9 0.04~0.14
SB1.25-1845 18 B3 8 19 22.5 25.72 40 20.66 12.52 11.17 19.5 12.16 2.65 0.29 0.27 0.03 0.038 SB1.25-1845
SB1.5-4518 45 B4 10 36 67.5 68.18 30 21.1 17.35 10 18 45 11.7 1.29 1.19 0.13 0.28 SB1.5-4518
m1.5 11 0.05~0.15
SB1.5-1845 18 B3 8 23 27 30.86 45 21.97 12.02 10.45 21 16.51 4.64 0.51 0.47 0.05 0.063 SB1.5-1845
Racks

Racks
SB2-4518 45 B4 12 48 90 90.91 40 27.91 23.14 15 25 62.24 26.8 3.05 2.74 0.31 0.65 SB2-4518
m2 14 0.06~0.16
SB2-1845 18 B3 10 32 36 41.15 60 28.69 16.03 14.2 27.5 23.11 10.7 1.22 1.09 0.12 0.16 SB2-1845
2.5
SB2.5-4518 45 B4 15 55 112.5 113.64 50 35.06 28.92 18 31 76.53 53.4 6.20 5.44 0.63 1.23 SB2.5-4518
m2.5 18 0.07~0.17
SB2.5-1845 18 B3 12 40 45 51.44 72 33.31 17.04 14.75 31.5 26.82 21.2 2.48 2.16 0.25 0.28 SB2.5-1845
CP Racks

CP Racks
SB3-4518
& Pinions

SB3-4518

& Pinions
45 B4 20 65 135 136.37 60 41.86 34.71 22 37 92.96 90.5 10.7 9.23 1.09 2.05
m3 21 0.08~0.18
SB3-1845 18 B3 16 48 54 61.72 85 38.04 19.05 16.3 36 33.41 36.0 4.29 3.67 0.44 0.46 SB3-1845
SB4-4518 45 B4 20 80 180 181.82 75 51.16 41.28 24 45 122.33 220 26.8 22.4 2.73 4.69 SB4-4518
m4 29 0.12~0.27
SB4-1845 18 B3 20 62 72 82.3 110 48.28 22.06 18 46 45.83 87.3 10.7 8.91 1.09 1.01 SB4-1845
SB5-4518 45 B4 25 100 225 227.28 90 59.43 47.85 28 51 156.56 411 51.8 41.9 5.28 8.31 SB5-4518
m5 34 0.14~0.34
SB5-1845 18 B3 20 80 90 102.87 135 55.82 25.07 20.5 52.5 56.9 164 20.7 16.7 2.11 1.95 SB5-1845
Gears

Gears
SB1-4515 45 B4 8 30 45 45.37 17 11.77 10.06 5 9 32.02 2.84 0.27 0.29 0.027 0.078 SB1-4515
Miter

Miter
m1 6 0.03~0.13
SB1-1545 15 B3 6 12 15 17.67 29 12.51 6.95 6 12 10.05 0.98 0.09 0.10 0.0091 0.095 SB1-1545
SB1.25-4515 45 B4 10 34 56.25 56.72 21 14.61 12.33 6 12 39.63 5.80 0.56 0.59 0.057 0.15 SB1.25-4515
m1.25 8 0.04~0.14
SB1.25-1545 15 B3 8 15 18.75 22.09 36 15.85 8.43 7.25 15 10.9 2.00 0.19 0.20 0.019 0.018 SB1.25-1545
SB1.5-4515 45 B4 10 36 67.5 68.06 28 20.44 17.59 11 17 46.58 10.3 1.02 1.05 0.10 0.25 SB1.5-4515
m1.5 10 0.05~0.15
SB1.5-1545 15 B3 8 18 22.5 26.54 47 23.19 13.92 12.5 22.5 14.75 3.56 0.34 0.36 0.035 0.041 SB1.5-1545
Gears

Gears
Bevel

Bevel
SB2-4515 45 B4 12 40 90 90.75 40 30.4 26.12 17 26 59.04 26.4 2.68 2.69 0.27 0.60 SB2-4515
m2 15 0.06~0.16
SB2-1545 15 B3 10 24 30 35.35 60 29.8 15.89 14 29 19.13 9.10 0.89 0.93 0.091 0.096 SB2-1545
SB2.5-4515 45 B4 15 50 112.5 113.43 50 38.35 32.65 22 35 72.84 53.6 5.55 5.46 0.57 1.22 SB2.5-4515
m2.5 20 0.07~0.17
SB2.5-1545 15 B3 12 30 37.5 44.18 75 38.41 19.86 17.5 37 20.51 18.5 1.85 1.89 0.19 0.19 SB2.5-1545
3
SB3-4515 45 B4 20 60 135 136.12 55 40.74 34.18 20 35 88.18 90.2 9.53 9.20 0.97 1.99 SB3-4515
Screw

Screw
Gears

Gears
m3 23 0.08~0.18
SB3-1545 15 B3 15 38 45 53.02 90 45.17 23.84 21.33 43 22.53 31.2 3.18 3.18 0.32 0.34 SB3-1545
SB4-4515 45 B5 20 80 180 181.5 70 50.79 42.24 24 45 118.09 211 23.0 21.5 2.35 3.89 SB4-4515
m4 30 0.12~0.27
SB4-1545 15 B3 16 50 60 70.69 115 54.6 26.78 23.33 52 32.26 72.8 7.67 7.43 0.78 0.77 SB4-1545
SB5-4515 45 B5 25 90 225 226.87 75 50.28 40.3 20 44 152.88 394 44.3 40.2 4.52 6.10 SB5-4515
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

m5 35 0.14~0.34
SB5-1545 15 B3 20 60 75 88.37 145 67.19 34.73 30 65 48.64 136 14.8 13.9 1.51 1.46 SB5-1545
Worm

Worm
SB6-4515 45 BT 30 160 270 272.24 100 72.62 58.36 30 62 169.26 751 87.0 76.6 8.87 18.0 SB6-4515
m6 50 0.16~0.36
SB6-1545 15 B3 25 70 90 106.03 175 89.04 42.67 36.67 86 49.77 259 39.9 26.4 4.06 2.61 SB6-1545
SBY8-4515 45 BT 35 200 360 362.99 125 83.74 69.49 30 67 255.92 1470 179 150 18.3 36.4 SBY8-4515
m8 50 0.20~0.45
SBY8-1545 15 B3 30 100 120 141.39 230 99.93 53.56 46.67 93 61.77 506 59.7 51.6 6.09 5.80 SBY8-1545
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
Bevel

Bevel
see page 303 for more details. or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- KHK stock gears is also available.
ferences will occur due to the corner chamfering of the gear tips.
③ For convenience in handling, BT Shaped Gears have tapped holes on their holding surface. To find the L dimensions and
tap sizes, please refer to Page 304.
Other

Other
326 Inquiries are now being accepted on our website. 327
 SB・SBY Module 1.5 ～ 6 SB・SBY
Steel Bevel Gears Steel Bevel Gears
Specifications
E K
Precision grade JIS B 1704 : 1978 grade 3 F
B J
G J K
Gear teeth Gleason J H K FD L J

Pressure angle 20°

E
E
Gears

Gears
Spur

Spur
F
I

E
F

I
S45C FD

G
Material

F
G
H

H
―

D
K

A
B
C
Heat treatment
A A A
Tooth hardness (less than 194HB) B B B
C C C
Surface treatment Black oxide coating
D D D
Helical

Helical
Gears

Gears
B3 B4 B5 BT
＊ FD has die-forged finish.

No. of Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SB1.5-6015 60 B4 12 50 90 90.41 32 24.2 21.58 12 21 65.38 17.3 1.75 1.77 0.18 0.62 SB1.5-6015
Internal

Internal
m1.5 12 0.05~0.15
Gears

Gears
SB1.5-1560 15 B3 8 18 22.5 26.66 56 23.01 11.52 10.43 22.5 15.54 4.46 0.44 0.45 0.045 0.043 SB1.5-1560
SB2-6015 60 B4 15 60 120 120.55 42 31.6 28.1 16 27 87.02 41.3 4.30 4.21 0.44 1.35 SB2-6015
m2 16 0.06~0.16
SB2-1560 15 B3 10 24 30 35.55 75 31.01 15.69 14.25 30 18.06 10.6 1.07 1.08 0.11 0.10 SB2-1560
SB2.5-6015 60 B4 20 70 150 150.69 53 40 35.63 20 34 108.64 80.2 8.54 8.18 0.87 2.51 SB2.5-6015
m2.5 20 0.07~0.17
SB2.5-1560 15 B3 12 30 37.5 44.44 94 39.02 19.87 18.06 37.5 20.57 20.6 2.13 2.10 0.22 0.21 SB2.5-1560
Racks

Racks
SB3-6015 60 B4 20 80 180 180.83 64 47.97 43.15 25 41 134.4 130 14.2 13.3 1.44 4.16 SB3-6015
4 m3 22 0.08~0.18
SB3-1560 15 B3 15 38 45 53.33 112 44.1 23.04 21.12 43 31.58 33.5 3.54 3.42 0.36 0.36 SB3-1560
SB4-6015 60 B5 25 85 240 241.1 80 59.2 52.2 36 53 174.03 328 37.0 33.5 3.77 6.00 SB4-6015
m4 32 0.12~0.27
SB4-1560 15 B3 16 50 60 71.10 150 62.03 31.4 28.75 60 36.12 84.5 9.24 8.62 0.94 0.91 SB4-1560
CP Racks

CP Racks
SBY5-6015
& Pinions

SBY5-6015

& Pinions
60 BT 30 180 300 301.36 80 53.97 45.22 20 45 218.79 642 74.4 65.4 7.59 17.5
m5 40 0.14~0.34
SBY5-1560 15 B3 25 60 75 88.9 185 75.03 36.74 33.13 73 49.15 165 18.6 16.8 1.90 1.58 SBY5-1560
SBY6-6015 60 BT 35 200 360 361.66 100 68.16 58.31 25 56 267.73 1050 126 107 12.8 30.7 SBY6-6015
m6 45 0.16~0.36
SBY6-1560 15 B3 25 75 90 106.66 220 85.17 42.08 38.13 82 54.92 270 31.5 27.5 3.21 2.83 SBY6-1560
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
see page 303 for more details. or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- KHK stock gears is also available.
Gears

Gears
Miter

Miter
ferences will occur due to the corner chamfering of the gear tips.
③ For convenience in handling, BT Shaped Gears have tapped holes on their holding surface. To find the L dimensions and
tap sizes, please refer to Page 304.
Gears

Gears
Bevel

Bevel
SB Module 1.5 ～ 3 SB
Steel Bevel Gears & Pinion Shafts Steel Bevel Gears & Pinion Shafts
E
Specifications
Screw

Screw
Gears

Gears
F
J
Precision grade JIS B 1704 : 1978 grade 3 I M K
Gear teeth Gleason J G

E
Pressure angle 20°

F
I

G
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

H
Material S45C H
Worm

Worm
C
D
B

A
Heat treatment ―＊
B
Tooth hardness (less than 194HB) ＊ C
D
Surface treatment Black oxide coating

＊ Pinions are thermal refined. The hardness of a gear

B8 B4
tooth is 200 to 270HB.
Bevel

Bevel
No. of Bore・Shaft dia. Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore・shaft Face width Holding surface dia. Shaft length Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Screw size Catalog No.
B C D E F G H I J K M Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SB1.5-6012 60 B4 12 50 90 90.33 30 23.89 21.82 12 21 65.52 ― ― 18.0 1.41 1.83 0.14 0.62 SB1.5-6012
m1.5 12 0.05~0.15
SB1.5-1260 12 B8 12.2 15 18 22.24 50 97.06 5.42 4.7 17.06 ― 80 M5 4.01 0.46 0.41 0.047 0.097 SB1.5-1260
Other

Other
SB2-6012 60 B4 15 60 120 120.43 40 31.85 29.09 16 27 86.96 ― ― 42.6 3.43 4.34 0.35 1.34 SB2-6012
m2 16 0.06~0.16
SB2-1260 12 B8 15.2 20 24 29.65 66 117.08 6.56 5.6 22.08 ― 95 M6 9.50 1.12 0.97 0.11 0.19 SB2-1260
5
SB2.5-6012 60 B4 20 70 150 150.54 50 39.81 36.36 20 34 108.8 ― ― 83.2 6.85 8.48 0.70 2.54 SB2.5-6012
m2.5 20 0.07~0.17
SB2.5-1260 12 B8 20.2 25 30 37.06 83 143.1 8.7 7.5 28.1 ― 115 M8 18.5 2.23 1.89 0.23 0.40 SB2.5-1260
SB3-6012 60 B4 20 80 180 180.65 60 47.43 43.64 25 41 134.73 ― ― 135 11.4 13.8 1.16 4.18 SB3-6012
m3 22 0.08~0.18
SB3-1260 12 B8 25.25 30 36 44.48 100 172.19 10.85 9.4 32.19 ― 140 M8 30.1 3.70 3.07 0.38 0.74 SB3-1260
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
see page 303 for more details. or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- KHK stock gears is also available.
ferences will occur due to the corner chamfering of the gear tips.

328 Inquiries are now being accepted on our website. 329

 SUB Module 1.5、2、2.5、3 SUB
Stainless Steel Bevel Gears Stainless Steel Bevel Gears
Specifications
E
Precision grade JIS B 1704 : 1978 grade 3 F
G J
Gear teeth Gleason J H K

Pressure angle 20°

E
Gears

Gears
Spur

Spur
I

F
Material SUS303

G
H
―

D
K

A
B
C
Heat treatment
A
Tooth hardness (less than 187HB) B
C
D
Helical

Helical
Gears

Gears
B3 B4

No. of Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Catalog No.
AH7 B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

SUB1.5-3020 30 B4 10 30 45 46.24 28 18.53 13.93 8 16 27.37 3.22 0.46 0.33 0.047 0.12 SUB1.5-3020
Internal

Internal
m1.5 9 0.05~0.15
Gears

Gears
SUB1.5-2030 20 B3 8 25 30 33.13 33 18.63 11.54 8.83 17 17.05 2.23 0.31 0.23 0.032 0.063 SUB1.5-2030
SUB2-3020 30 B4 10 35 60 61.65 40 26.87 21.24 15 23 37.56 7.22 1.08 0.74 0.11 0.26 SUB2-3020
m2 11 0.06~0.16
SUB2-2030 20 B3 10 35 40 44.18 45 25.06 16.39 13.33 22 21.34 5.01 0.72 0.51 0.074 0.16 SUB2-2030
1.5
SUB2.5-3020 30 B4 15 45 75 77.07 50 34.22 26.55 18 30 45.61 14.9 2.28 1.52 0.23 0.54 SUB2.5-3020
m2.5 15 0.07~0.17
SUB2.5-2030 20 B3 12 40 50 55.22 55 31.06 19.24 14.16 28 27.42 10.3 1.52 1.05 0.15 0.28 SUB2.5-2030
Racks

Racks
SUB3-3020 30 B4 15 60 90 92.48 55 35.56 26.86 17 31 57.14 24.8 3.87 2.53 0.39 0.94 SUB3-3020
m3 17 0.08~0.18
SUB3-2030 20 B3 15 50 60 66.27 70 40.48 27.09 21.66 37 34.71 17.2 2.58 1.76 0.26 0.55 SUB3-2030
SUB1.5-4020 40 B4 10 38 60 60.88 35 25.01 20.88 15 22 39.64 5.23 0.79 0.53 0.081 0.27 SUB1.5-4020
m1.5 10 0.05~0.15
SUB1.5-2040 20 B3 8 25 30 33.61 46 25.54 16.9 14.75 24 17.28 2.64 0.40 0.27 0.040 0.088 SUB1.5-2040
CP Racks

CP Racks
& Pinions

& Pinions
SUB2-4020 40 B4 12 50 80 81.17 45 32.37 26.17 18 27 48.46 13.4 2.07 1.36 0.21 0.61 SUB2-4020
m2 15 0.06~0.16
SUB2-2040 20 B3 12 32 40 44.81 60 34.16 21.2 18 32 20.92 6.72 1.04 0.69 0.11 0.19 SUB2-2040
2
SUB2.5-4020 40 B4 15 60 100 101.46 55 39.73 31.46 20 35 60.28 27.1 4.29 2.76 0.44 1.21 SUB2.5-4020
m2.5 20 0.07~0.17
SUB2.5-2040 20 B3 12 40 50 56.01 75 43.78 26.5 22.5 41 24.56 13.6 2.15 1.39 0.22 0.40 SUB2.5-2040
SUB3-4020 40 B4 20 70 120 121.76 65 45.85 36.76 24 38 73.81 44.4 7.19 4.53 0.73 1.86 SUB3-4020
m3 22 0.08~0.18
SUB3-2040 20 B3 16 50 60 67.22 90 50.81 31.8 27.5 47 29.61 22.4 3.60 2.28 0.37 0.69 SUB3-2040
Gears

Gears
Miter

Miter
SUB1.5-4515 45 B4 10 36 67.5 68.06 28 20.44 17.59 11 17 46.58 5.70 0.72 0.58 0.074 0.25 SUB1.5-4515
m1.5 10 0.05~0.15
SUB1.5-1545 15 B3 8 18 22.5 26.54 47 23.19 13.92 12.5 22.5 14.75 1.97 0.24 0.20 0.025 0.041 SUB1.5-1545
SUB2-4515 45 B4 12 60 90 90.75 40 30.4 26.12 17 26 59.04 14.6 1.90 1.49 0.19 0.80 SUB2-4515
m2 15 0.06~0.16
SUB2-1545 15 B3 10 24 30 35.35 60 29.8 15.89 14 29 19.13 5.03 0.63 0.51 0.065 0.095 SUB2-1545
3
Gears

Gears
SUB2.5-4515 45 B4 15 60 112.5 113.43 50 38.35 32.65 22 35 72.84 29.6 3.94 3.02 0.40 1.36 SUB2.5-4515
Bevel

Bevel
m2.5 20 0.07~0.17
SUB2.5-1545 15 B3 12 30 37.5 44.18 75 38.41 19.86 17.5 37 20.51 10.2 1.31 1.04 0.13 0.19 SUB2.5-1545
SUB3-4515 45 B4 20 80 135 136.12 55 40.74 34.18 20 35 88.18 49.9 6.77 5.09 0.69 2.32 SUB3-4515
m3 23 0.08~0.18
SUB3-1545 15 B3 15 38 45 53.02 90 45.17 23.84 21.33 43 22.53 17.2 2.26 1.76 0.23 0.34 SUB3-1545

[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
Screw

Screw
Gears

Gears
see page 303 for more details. or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
② Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif- KHK stock gears is also available.
ferences will occur due to the corner chamfering of the gear tips.
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Worm

Worm
Bevel

Bevel
Other

Other
330 Inquiries are now being accepted on our website. 331
 PB Module 1 ～ 3 PB
Plastic Bevel Gears Plastic Bevel Gears
Specifications
E
Precision grade JIS B 1704 : 1978 grade 4 ＊ F
G J
Gear teeth Gleason J H K

Pressure angle 20°

E
Gears

Gears
Spur

Spur
I

F
Material MC901

G
H
―

D
K

A
B
C
Heat treatment
A
Tooth hardness (115 ～ 120HRR) B
＊ The precision grade of this product is C
equivalent to the value shown in the table. D
Helical

Helical
Gears

Gears
B3 B4

No. of Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module
teeth
Shape Catalog No.
A B C D E F G H I J K Bending strength Surface durability Bending strength Surface durability (mm) (kg)

PB1.5-3020 30 B4 10 30 45 46.24 28 18.53 13.93 8 16 27.37 1.61 0.16 0.018 PB1.5-3020

Internal

Internal
m1.5 9 ― ― 0~0.25
Gears

Gears
PB1.5-2030 20 B3 8 25 30 33.13 33 18.63 11.54 8.83 17 17.05 0.87 0.089 0.0093 PB1.5-2030
PB2-3020 30 B4 10 35 60 61.65 40 26.87 21.24 15 23 37.56 3.65 0.37 0.039 PB2-3020
m2 11 ― ― 0~0.26
PB2-2030 20 B3 10 35 40 44.18 45 25.06 16.39 13.33 22 21.34 1.97 0.20 0.024 PB2-2030
1.5
PB2.5-3020 30 B4 15 45 75 77.07 50 34.22 26.55 18 30 45.61 7.46 0.76 0.081 PB2.5-3020
m2.5 15 ― ― 0~0.27
PB2.5-2030 20 B3 12 40 50 55.22 55 31.06 19.24 14.16 28 27.42 4.04 0.41 0.042 PB2.5-2030
Racks

Racks
PB3-3020 30 B4 15 60 90 92.48 55 35.56 26.86 17 31 57.14 12.5 1.28 0.14 PB3-3020
m3 17 ― ― 0~0.28
PB3-2030 20 B3 15 50 60 66.27 70 40.48 27.09 21.66 37 34.71 6.77 0.69 0.082 PB3-2030
PB1-4020 40 B4 8 25 40 40.59 22 15.07 12.59 8 12 26.58 0.74 0.075 0.010 PB1-4020
m1 6 ― ― 0~0.23
PB1-2040 20 B3 6 16 20 22.41 28 13.78 8.6 7 12 9.17 0.28 0.028 0.0029 PB1-2040
CP Racks

CP Racks
& Pinions

& Pinions
PB1.25-4020 40 B4 10 32 50 50.73 27 18.54 15.23 10 16 33.61 1.50 0.15 0.021 PB1.25-4020
m1.25 8 ― ― 0~0.24
PB1.25-2040 20 B3 8 22 25 28.01 36 18.66 11.75 10.25 17 13.22 0.56 0.058 0.0068 PB1.25-2040
PB1.5-4020 40 B4 10 38 60 60.88 35 25.01 20.88 15 22 39.64 2.66 0.27 0.039 PB1.5-4020
m1.5 10 ― ― 0~0.25
PB1.5-2040 20 B3 8 25 30 33.61 46 25.54 16.9 14.75 24 17.28 1.00 0.10 0.013 PB1.5-2040
2
PB2-4020 40 B4 12 40 80 81.17 45 32.37 26.17 18 27 48.46 6.72 0.69 0.076 PB2-4020
m2 15 ― ― 0~0.26
PB2-2040 20 B3 12 32 40 44.81 60 34.16 21.2 18 32 20.92 2.52 0.26 0.028 PB2-2040
Gears

Gears
Miter

Miter
PB2.5-4020 40 B4 15 50 100 101.47 55 39.73 31.47 20 35 60.28 13.5 1.38 0.16 PB2.5-4020
m2.5 20 ― ― 0~0.27
PB2.5-2040 20 B3 12 40 50 56.01 75 43.78 26.5 22.5 41 24.56 5.08 0.52 0.060 PB2.5-2040
PB3-4020 40 B4 20 60 120 121.76 65 45.85 36.76 24 38 73.81 22.4 2.29 0.25 PB3-4020
m3 22 ― ― 0~0.28
PB3-2040 20 B3 16 50 60 67.22 90 50.81 31.8 27.5 47 29.61 8.42 0.86 0.10 PB3-2040
Gears

Gears
PB1.5-4515 45 B4 10 40 67.5 68.06 28 20.44 17.59 11 17 46.58 3.18 0.32 0.040 PB1.5-4515
Bevel

Bevel
m1.5 10 ― ― 0~0.25
PB1.5-1545 15 B3 8 18 22.5 26.54 47 23.19 13.92 12.5 22.5 14.75 0.68 0.070 0.0061 PB1.5-1545
PB2-4515 45 B4 12 60 90 90.75 40 30.4 26.12 17 26 59.04 8.07 0.82 0.12 PB2-4515
m2 15 ― ― 0~0.26
PB2-1545 15 B3 10 24 30 35.35 60 29.8 15.89 14 29 19.13 1.73 0.18 0.014 PB2-1545
3
PB2.5-4515 45 B4 15 60 112.5 113.43 50 38.35 32.65 22 35 72.84 16.3 1.66 0.20 PB2.5-4515
m2.5 20 ― ― 0~0.27
Screw

Screw
Gears

Gears
PB2.5-1545 15 B3 12 30 37.5 44.18 75 38.41 19.86 17.5 37 20.51 3.50 0.36 0.028 PB2.5-1545
PB3-4515 45 B4 20 80 135 136.12 55 40.74 34.18 20 35 88.18 27.6 2.81 0.35 PB3-4515
m3 23 ― ― 0~0.28
PB3-1545 15 B3 15 38 45 53.02 90 45.17 23.84 21.33 43 22.54 5.92 0.60 0.050 PB3-1545
[Caution on Product Characteristics] ① Significant variations in temperature or humidity can cause dimensional changes in plastic gears (MC Nylon gears), in- [Caution on Secondary Operations] ① Please read “Caution on Performing Secondary Operations” (Page 304) when performing modifications and/
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

cluding bore size (H8 when produced), tooth diameter, and backlash. Please see the section “Design of Plastic Gears” in or secondary operations for safety concerns. KHK Quick-Mod Gears, the KHK's system for quick modification of
Worm

Worm
separate technical reference book. (Page 101). KHK stock gears is also available.
② The allowable torques shown in the table are calculated values according to the assumed usage conditions. Please see ② Plastic gears are susceptible to the effects of temperature and moisture. Dimensional changes may occur while
page 303 for more details. performing secondary operations and during post-machining operations.
③ Dimensions of the outside diameter, the overall length and crown to back length are all theoretical values, and some dif-
ferences will occur due to the corner chamfering of the gear tips.
④ Without lubrication, using plastic gears in pairs may generate heat and dilation. It is recommended to mate them with
Bevel

Bevel
steel gears.
Other

Other
＊ In regards to MC Nylon gears, other materials are available, including Ultra
High Molecular Weight Polyethylene (UHMW-PE), which has excellent abrasion
resistance, and resin conforming to the Plastic Implementation Measure (PIM).
A single piece order is acceptable and will be produced as a custom-made
gear. For details on quotations and orders please see Page 16.

332 Inquiries are now being accepted on our website. 333

 DB Module 0.5 ～ 1 DB
Injection Molded Bevel Gears Injection Molded Bevel Gears
Specifications E
Precision grade JIS B 1704 : 1978 grade 6 F
G K J
Gear teeth Gleason J H

E
Pressure angle 20°
Gears

Gears
Spur

Spur
F
G
Material Duracon（M90-44）

H
Heat treatment ―

D
A
B
Tooth hardness (110 ～ 120HRR) A
B
D
Helical

Helical
Gears

Gears
B1 B9

Bore Hub dia. Pitch dia. Outside dia. Mounting distance Total length Crown to back length Hub width Length of bore Face width Holding surface dia. Allowable torque (N·m) Allowable torque (kgf·m) Backlash Weight
Catalog No. Gear ratio Module No. of teeth Shape Catalog No.
A B C D E F G H I J K Bending strength Bending strength (mm) (g)

DB0.5-4020 40 B9 4 12 20 20.29 12 8.33 7.29 4 7 14.41 0.24 0.025 2.00 DB0.5-4020

Internal

Internal
m0.5 2.5 0 ~ 0.30
Gears

Gears
DB0.5-2040 20 B1 3 8 10 11.2 16 8.46 6.3 4 ― ― 0.092 0.0094 0.54 DB0.5-2040
DB0.8-4020 40 B9 5 15 32 32.47 18 11.91 10.47 6 10 24.17 0.91 0.093 6.26 DB0.8-4020
2 m0.8 3.5 0 ~ 0.48
DB0.8-2040 20 B1 4 12 16 17.92 24 11.5 8.48 5 ― ― 0.34 0.035 1.87 DB0.8-2040
DB1-4020 40 B9 6 18 40 40.59 22 14.45 12.59 7.5 12.5 30.44 1.59 0.16 11.9 DB1-4020
m1 4.5 0 ~ 0.60
DB1-2040 20 B1 5 15 20 22.4 30 14.49 10.6 7 ― ― 0.60 0.061 3.54 DB1-2040
Racks

Racks
[Caution on Product Characteristics] ① The allowable torques shown in the table are the calculated values according to the assumed usage conditions. Please [Caution on Secondary Operations] ① Avoid performing secondary operations as reworking material may expose air bubbles (voids).
see page 303 for more details.
② The bore tolerance is generally -0.05 to -0.3 but may be + values at the central portion of the hole.
③ To find the dimensional tolerance of these gears, please see the Dimensional Tolerance Table. ■ Dimensional tolerance table（Unit : mm）
CP Racks

CP Racks
& Pinions

& Pinions
Range Tolerance

below 3 mm ± 0.20
3 up to 6 mm ± 0.25
6 up to 10 mm ± 0.30
Gears

Gears
Miter

Miter
10 up to 18 mm ± 0.35
18 up to 30 mm ± 0.40
30 mm up ± 0.50
Gears

Gears
Bevel

Bevel
Screw

Screw
Gears

Gears
BB
Sintered Metal Bushings Sintered Metal Bushings
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

Worm

Worm
The table shows a series of standard metal
L

bushings that can be pressed into standard

Injection Molded Gears. They can be used
as bearing metal on idler gears or to reduce
D
d
Bevel

Bevel
the bore of the gears.

T8
Other

Other
I.D. of bushing O.D. of bushing Total Length Products that can
Catalog No.
d +0.02
0 D +－0.01
0.02 0
L －0.3
－0.01
use the bushing

BB30507 3 5 7 DB0.8
BB40612 4 6 12 DB1
Material : Oil impregnated sintered bronze.

334 Inquiries are now being accepted on our website. 335

 KSP KSP
Ground Spiral Bevel Gears Ground Spiral Bevel Gears

■ Notes about the Transmission Capability Table

1. The values given in the table are for a service factor, Sf ■ Service Factor S f
Gears

Gears
1. Using the table on the right, please modify the value
Spur

Spur
Impact from Load Side of Machine
according to the actual conditions. Load torque compen- Impact from Prime Mover
Uniform Load Medium Impact Load Heavy Impact Load
sation is calculated from the load torque at the output
Uniform Load
shaft x service factor (Sf). 1.0 1.25 1.75
（Motor, Turbine, Hydraulic Motor）
Helical

Helical
Gears

Gears
2. For speed increaser applications (where the gear is the Light Impact Load
1.25 1.5 2.0
driver and the pinion is driven), the torque on the pinion （Multicylinder Engine）
Medium Impact Load
is the value in the table multiplied by the speed ratio. 1.5 1.75 2.25
（Single Cylinder Engine）
NOTE 1: For speed ratio of 1/1.5, the torque on the pinion is 1/1.5
Internal

Internal
Gears

Gears
times the value given in the table.

■ Transmission Capability Table（Speed Ratio 1/1） Upper Transmission Capability（kw）Lower Torque（N･m）

Rotation（rpm）
Model 50 100 300 600 900 1200 1800 3000
0.035 0.068 0.195 0.375 0.548 0.716 1.04 1.65
Racks

Racks
KSP031001
6.65 6.51 6.20 5.98 5.82 5.69 5.51 5.25
0.092 0.179 0.511 0.980 1.43 1.86 2.69 4.25
KSP040001
17.6 17.2 16.3 15.6 15.2 14.8 14.3 13.5
0.211 0.412 1.17 2.23 3.25 4.22 6.08 9.55
KSP053001
40.4 39.3 37.3 35.6 34.5 33.6 32.3 30.4
CP Racks

CP Racks
& Pinions

& Pinions
0.367 0.715 2.02 3.85 5.59 7.26 10.4 16.3
KSP066001
70.2 68.3 64.4 61.4 59.3 57.8 55.4 52.0
0.577 1.12 3.16 6.00 8.68 11.2 16.1 25.1
KSP078001
109.8 106.9 101.0 95.5 92.2 89.5 85.5 79.8
0.901 1.75 4.91 9.31 13.5 17.4 24.9 38.6
KSP092001
172.6 166.7 156.9 148.1 143.2 138.3 132.4 122.6
1.44 2.78 7.80 14.7 21.2 27.4 39.1 60.3
KSP105001
274.6 265.8 248.1 234.4 225.6 218.7 207.9 192.2
Gears

Gears
Miter

Miter
2.33 4.50 12.6 23.6 34.0 43.7 62.0 95.0
KSP132001
■ Catalog Number of NISSEI Spiral Bevel Gears ■ The Characteristics of KSP Spiral Bevel Gears 445.2
3.68
430.5
7.10
400.1
19.7
376.6
37.0
360.9
53.0
348.1
68.1
329.5
96.2
302.0
146
KSP157001
The catalog number systems of KSP Ground Spiral Bevel 1. JIS Grade 0, high strength, high precision products 704.1
5.31
678.6
10.2
628.6
28.3
589.4
52.8
562.9
75.5
542.3
96.8
510.9
136
466.8
206
KSP184001
Gears differs from other miter and bevel gears. 2. Superior performance with regard to high speed, low 1010 976.7 901.2 841.4 801.2 770.8 722.8 656.1
Gears

Gears
Bevel

Bevel
noise, and low vibration.
3. Module range from 1.5 to 6 ■ Transmission Capability Table（Speed Ratio 1/1.5） Upper Transmission Capability（kw）Lower Torque（N･m）
Pinion Rotation(rpm)
4. Three gear ratios: 1, 1.5 and 2 50 100 300 600 900 1200 1800 3000
KSP 031 001 G U L Model

KSP0481.5
0.077
22.2
0.151
21.6
0.432
20.6
0.830
19.8
1.21
19.3
1.58
18.9
2.29
18.2
3.64
17.4
Screw

Screw
Gears

Gears
0.159 0.309 0.882 1.69 2.46 3.21 4.64 7.33
KSP0611.5
Hand of Spiral (L) 45.4 44.3 42.2 40.4 39.2 38.3 37.0 35.0

■ Products Style KSP0741.5

0.277 0.540 1.53 2.93 4.27 5.55 8.00 12.6

Products Shape 79.4

0.466
77.4
0.908
73.4
2.57
70.1
4.90
68.0
7.12
66.3
9.24
63.7
13.3
60.1
20.8
(Masked to modify) For Type U products - The hub is masked to allow secondary operations KSP0901.5
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

133.4 130.4 122.6 116.7 113.8 110.8 105.9 99.0

※ The heavy lines in the figure below indicate the masked areas during
Worm

Worm
Surface finish (Ground) KSP1051.5
0.700
201.0
1.36
195.2
3.84
183.4
7.31
174.6
10.6
168.7
13.7
163.8
19.7
156.9
30.7
147.1
carburizing. 1.03 2.00 5.63 10.7 15.5 20.0 28.6 44.5
KSP1241.5
Gear Ratio (1) 295.2 286.4 268.7 255.0 246.1 239.3 227.5 212.8
1.56 3.03 8.51 16.1 23.2 30.1 42.9 66.4
KSP1411.5
OD of the Larger gear 448.2 434.4 406.0 384.4 370.7 358.9 341.3 317.7

(31 mm) KSP1631.5

2.27 4.39 12.3 23.2 33.4 43.1 61.4 94.6
Bevel

Bevel
650.2 628.6 587.4 554.1 532.5 514.8 489.4 452.1

Type (Spiral Miter Gears) KSP1811.5

2.92
836.5
5.64
809.0
15.8
754.1
29.7
710.0
42.7
680.6
55.1
658.0
78.3
623.7
120
574.7

■ Transmission Capability Table（Speed Ratio 1/2） Upper Transmission Capability（kw）Lower Torque（N･m）

Other

Other
Pinion Rotation(rpm)
Model 50 100 300 600 900 1200 1800 3000
0.025 0.049 0.142 0.275 0.404 0.528 0.770 1.23
KSP039002
9.63 9.45 9.07 8.76 8.57 8.41 8.17 7.83
0.075 0.147 0.423 0.814 1.19 1.55 2.26 3.59
KSP056002
28.8 28.1 27.0 26.0 25.3 24.8 23.9 22.8
0.185 0.361 1.03 1.98 2.89 3.76 5.45 8.61
KSP075002
70.7 69.0 65.7 63.1 61.3 59.9 57.9 54.8
0.364 0.710 2.02 3.86 5.62 7.31 10.5 16.6
KSP096002
139.3 135.3 128.5 122.6 119.6 116.7 111.8 105.9
0.649 1.26 3.58 6.82 9.90 12.9 18.5 29.0
KSP119002
248.1 241.2 227.5 217.7 209.9 205.0 196.1 184.4
1.07 2.08 5.87 11.2 16.2 21.0 30.1 46.9
KSP145002
408.9 397.2 373.6 356.0 343.2 333.4 319.7 298.1
1.78 3.45 9.72 18.4 26.6 34.5 49.3 76.5
KSP172002
680.6 660.0 618.8 587.4 565.8 549.2 523.7 487.4

336 337
 KSP Made by Nissei Module 1.5 ～ 6 KSP
Nissei Ground Spiral Miter Gears Ground Spiral Miter Gears
Specifications E E E E
Precision grade JIS B 1704 : 1978 grade 0

Gear teeth Gleason

Pressure angle 20°
Gears

Gears
A

A
D
B

D
B
C

C
Spur

Spur
D
A

C
B

D
A

C
B
Helix angle 35°
Material SCM415＊
Carburizing (bore & hubs are
Heat treatment
masked) F F
F
Tooth hardness 60 ～ 63HRC ＊＊ F
Helical

Helical
G G
Gears

Gears
＊ Module 3.5 and larger are made of SCM420. G G
＊＊ Tooth Hardness for module 1.5 and 2 is between 80 to 83 HRA. H A H A' B C
H H

Direction Outside dia. Holding surface dia. Bore Hub dia. Length of bore Hub width Total length Mounting distance Allowable torque Backlash Weight
Catalog No. Gear ratio Module No. of teeth
of spiral
Pitch dia. Face width Shape Keyway Catalog No.
A B CH7 D E F G H (kgf·m) (mm) (kg)
Internal

Internal
KSP031001GU L L KSP031001GU L
Gears

Gears
KSP031001GU R m1.5 20 R 30 7 A 30.5 16.5 10 22 13 6 15 25 12 0.61 0 ~0.05 0.04 KSP031001GU R
KSP040001GU L m2 20 L 40 9 B 40 22.5 12 31 14 7 16.5 30 16 1.59 0 ~0.05 0.09 KSP040001GU L
KSP040001GU R R KSP040001GU R
KSP053001GU L m2.5 21 L 52.5 12 B 53 31 14 38 20 8 22.8 40 22 3.63 0.05~0.10 0.21 KSP053001GU L
KSP053001GU R R KSP053001GU R
KSP066001GU L m3 21 L 63 15 B 65 33.5 16 47 25 13 29.5 50 25 6.26 0.05~0.10 0.39 KSP066001GU L
Racks

Racks
KSP066001GU R R KSP066001GU R
KSP078001GU L m3.5 22 L 77 18 B 78 43 20 54 27 12 32 57 32 9.74 0.05~0.10 0.59 KSP078001GU L
KSP078001GU R R KSP078001GU R
1
KSP092001GU L m4 22 L 88 21 B 91 49 22 63 32 14 38 66 38 15.1 0.05~0.10 0.96 KSP092001GU L
KSP092001GU R R KSP092001GU R
CP Racks

CP Racks
& Pinions

& Pinions
KSP105001GU L m4.5 23 L 103.5 25 C 105 50 26 70 35 14 39 72 40 23.9 0.05~0.10 1.33 KSP105001GU L
KSP105001GU R R KSP105001GU R
KSP132001GU L m5 26 L 130 29 C 132 64 30 82 41 14 45 88 48 38.4 0.05~0.10 2.49 KSP132001GU L
KSP132001GU R R KSP132001GU R
KSP157001GU L m5.5 28 L 154 34 C 157 76 32 92 47 20 53.5 105 55 60.1 0.05~0.10 3.90 KSP157001GU L
KSP157001GU R R KSP157001GU R
KSP184001GU L m6 30 L 180 38 C 184 84 40 101 51 17 56.5 118 62 85.8 0.05~0.10 5.79 KSP184001GU L
KSP184001GU R R KSP184001GU R
Gears

Gears
Miter

Miter
KSP0481.5GU P m2 16 L 32 9 A' 34 17.5 10 24 13 4.5 14.5 31 ― 2.02 0 ~0.05 0.05 KSP0481.5GU P
KSP0481.5GU G 24 R 48 B 48 30 12 30 17 7 19 30 20 0.14 KSP0481.5GU G
KSP0611.5GU P m2.25 18 L 40.5 12 A' 42 22 12 30 17 5.5 19 39 16 4.12 0.05~0.10 0.10 KSP0611.5GU P
KSP0611.5GU G 27 R 60.75 B 61 36 14 40 20 10 23.5 37 27 0.28 KSP0611.5GU G
KSP0741.5GU P m2.75 18 L 49.5 15 A' 52 27 14 40 20 6 22 46 20 7.15 0.05~0.10 0.20 KSP0741.5GU P
KSP0741.5GU G 27 R 74.25 B 74 44.5 20 50 25 12 29 45 35 0.49 KSP0741.5GU G
Gears

Gears
Bevel

Bevel
KSP0901.5GU P m3 20 L 60 18 B 63 34 16 44 24 8 26.5 56 25 11.9 0.05~0.10 0.34 KSP0901.5GU P
KSP0901.5GU G 30 R 90 B 90 54.5 20 56 29 13 33 53 42 0.84 KSP0901.5GU G
KSP1051.5GU P 1.5 m3.5 20 L 70 21 B 74 38 20 50 25 7 28.5 63 28 17.8 0.05~0.10 0.47 KSP1051.5GU P
KSP1051.5GU G 30 R 105 C 105 53 22 63 32 13 34 57 42 1.18 KSP1051.5GU G
KSP1241.5GU P m3.75 22 L 82.5 24 B 87 46.5 20 56 29 7 33 74 36 26.0 0.05~0.10 0.80 KSP1241.5GU P
KSP1241.5GU G 33 R 123.75 C 124 64 26 69 35 14 36.5 64 48 1.71 KSP1241.5GU G
Screw

Screw
Gears

Gears
KSP1411.5GU P m4.25 22 L 93.5 28 B 99 53 22 63 32 7 36 82 42 39.2 0.05~0.10 1.15 KSP1411.5GU P
KSP1411.5GU G 33 R 140.25 C 141 68 30 73 41 17 43.5 74 50 2.46 KSP1411.5GU G
KSP1631.5GU P m4.5 24 L 108 32 B 113 64.5 26 69 35 7 38.5 92 48 56.5 0.05~0.10 1.64 KSP1631.5GU P
KSP1631.5GU G 36 R 162 C 163 76 32 82 47 19 49.5 85 55 3.84 KSP1631.5GU G
KSP1811.5GU P m5 24 L 120 35 B 126 71.5 30 73 41 10 45.5 105 55 72.4 0.05~0.10 2.21 KSP1811.5GU P
KSP1811.5GU G 36 R 180 C 181 86 38 90 48 19 50.5 90 60 4.85 KSP1811.5GU G
Products Gearboxes Gear Pairs

Products Gearboxes Gear Pairs

KSP039002GU P 13 L 19.5 A 21 10.2 8 16 14 7.6 14.5 28 ― 0.02 KSP039002GU P
Worm

Worm
KSP039002GU G m1.5 26 R 39 7 B 38.5 24 10 24 13 7 15 22 20 0.89 0 ~0.05 0.07 KSP039002GU G
KSP056002GU P m2 14 L 28 10 B 30 15.3 8 20 12 2.5 13 32 10 2.65 0 ~0.05 0.04 KSP056002GU P
KSP056002GU G 28 R 56 B 56 35.5 12 30 18 8 20.5 30 20 0.19 KSP056002GU G
KSP075002GU P m2.5 15 L 37.5 14 A' 40 20 12 30 17 4.5 19.5 44 14 6.43 0.05~0.10 0.10 KSP075002GU P
KSP075002GU G 30 R 75 C 75 36 16 44 24 11 25.5 38 25 0.44 KSP075002GU G
KSP096002GU P 2 m3 16 L 48 18 B 53 23.5 12 36 19 2.5 21.5 53 19 12.5 0.05~0.10 0.20 KSP096002GU P
Bevel

Bevel
KSP096002GU G 32 R 96 C 96 46 20 56 29 12 31 47 32 0.91 KSP096002GU G
KSP119002GU P m3.5 17 L 59.5 22 A 65 34 16 44 25 3.6 27.5 67 25 22.2 0.05~0.10 0.36 KSP119002GU P
KSP119002GU G 34 R 119 C 119 54 26 63 34 15 35.5 55 40 1.45 KSP119002GU G
KSP145002GU P m4 18 L 72 27 A 78 38 20 54 28 3.5 33 80 30 36.3 0.05~0.10 0.65 KSP145002GU P
KSP145002GU G 36 R 144 C 145 60 30 73 39 16 40.5 64 42 2.44 KSP145002GU G
KSP172002GU P m4.5 19 L 85.5 32 A 93 48 26 69 34 4.4 38 94 38 59.9 0.05~0.10 0.97 KSP172002GU P
KSP172002GU G 38 R 171 C 172 70 36 79 46 KSP172002GU G
Other

20 47 75 50 3.80

Other
[Caution on Product Characteristics] ① The allowable torque is calculated by converting the output torque (600 rpm) on Page 337 to kgf/m, according to as- [Caution on Secondary Operations] ①P
 lease read “Caution on Performing Secondary Operations” (Page 304) when performing
sumed usage conditions. modifications and/or secondary operations for safety concerns. KHK Quick-Mod Gears,
② These gears produce axial thrust forces. See Page 274 for more details. the KHK system for quick modification of KHK stock gears, is also available.

338 Inquiries are now being accepted on our website. 339

 KSP
Nissei Ground Spiral Bevel Gears

■ Adjusting Tooth Contact

Gears
Spur

＜ Centering tooth contact ＞ （1）When there is an angular error of the shafts

（1）When assembled correctly, the contact will occur in the middle
Helical
Gears

of the tooth flank.

（2）The contact area along the tooth face should be in the center of
the tooth, but somewhat closer to the toe is ideal.
Internal
Gears

When the gears are assembled in to the gearbox and the Error

backlash is adjusted, adjust the gearbox to obtain the tooth

contact as shown below. Inaccurate assembly will lead to
Racks

Toe contact
irregular noise and uneven wear,

Heel
Heel contact
CP Racks
& Pinions

Error
Gears
Miter

Toe
Gears
Bevel

（2）When the pinion shaft is offset （3）When the mounting distance of the pinion is incorrect
Screw
Gears

Heel contact Low contact

High contact
Heel contact
Toe contact
Products Gearboxes Gear Pairs
Worm

Error Error

High contact
Bevel

Low contact

High contact
Toe contact
Heel contact Low contact

Toe contact
Other

Error

Error

Low contact
High contact

340