Quality Transmission is the largest North American supplier of off-the-shelf metric gearing. KHK Stock Gears are proudly produced by Kohara Gear Industry of Saitama Japan and stocked in North America by Quality Transmission Components



Specifications
Precision grade JIS B 1704 grade 3 Core hardness Less than HB194
(pinion are less then HB225-260)
Gear teeth Gleason Surface hardness
Pressure angle 20 Surface treatment Black oxide
Material S45C (Carbon steel) Surface finish Cut
Heat treatment Normalized (pinion only) Datum reference surface
for gear cutting		 Bore except shaft for pinion


B4

Gear Ratio 5
 Module 1.53
Catalog No. Module No. of
teeth		 Hole dia.
Shaft dia.		 Hub dia. Pitch dia. Outside dia. Mounting
distance		 Total length Crown to
back length		 Hub width HoleShaft
length
Face width Holding
surface dia.		 Face angle Shaft length Bolt Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
m z AH7(hole)
Ah7(shaft)		 B C D E F G H I J K L M Bending
strength		 Surface
durability		 Bending
strength		 Surface
durability
SB1.5-6012
[ DXF| DWG | 3D CAD]
SB1.5-1260
[ DXF| DWG | 3D CAD]		 1.5 60

12

 12

12.2

 50

15

 90

18

 90.33

22.24

 30

50

 23.89

97.06

 21.82

5.42

 12

4.7

 21

17.06

 12

 65.52 8005'

1422'

 80

 M5

 B4

B8

 1.222

0.2112

 0.1945

0.0389

 11.98

2.071

 1.907

0.3815

 0.050.15

 0.42

0.1

 SB1.5-6012

SB1.5-1260

SB2-6012
[ DXF| DWG | 3D CAD]
SB2-1260
[ DXF| DWG | 3D CAD]		 2 60

12

 15

15.2

 60

20

 120

24

 120.43

29.65

 40

66

 31.85

117.08

 29.09

6.56

 16

5.6

 27

22.08

 16

 86.96

8005'

1422'

 95

 M6

 B4

B8

 2.897

0.5006

 0.4688

0.0938

 28.41

4.909

 4.597

0.9199

 0.060.16

 1.3

0.2

 SB2-6012

SB2-1260

SB2.5-6012
[ DXF| DWG | 3D CAD]
SB2.5-1260
[ DXF| DWG | 3D CAD]		 2.5 60

12

 20

20.2

 70

25

 150

30

 150.54

37.06

 50

83

 39.81

143.1

 36.36

8.7

 20

7.5

 34

28.1

 20

 108.8

8005'

1422'

 115

 M8

 B4

B8

 5.657

0.9778

 0.9263

0.1853

 55.48

9.589

 9.084

1.817

 0.070.17

 2.5

0.41

 SB2.5-6012

SB2.5-1260

SB3-6012
[ DXF| DWG | 3D CAD]
SB3-1260
[ DXF| DWG | 3D CAD]		 3 60

12

 20

25.25

 80

30

 180

36

 180.65

44.48

 60

100

 47.43

172.19

 43.64

10.85

 25

9.4

 41

32.19

 22

 134.73

 8005'

1422'

 140

 M8

 B4

B8

 9.187

1.588

 1.519

0.3037

 90.09

15.57

 14.9

2.978

 0.080.18

 4.2

0.75

 SB3-6012

SB3-1260

Pitch Angle Gear 7841' Pinion 1119'
CAUTION: 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 the gear tips.
NOTE: The allowable torques shown in the table are calculated according to JGMA Standards 403-01 and 404-01.

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