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 HB187
Gear teeth Gleason Surface hardness
Pressure angle 20 Surface treatment -
Material SUS303 (Stainless steel) Surface finish Cut
Heat treatment - Datum reference surface
for gear cutting		 Bore

B3

20 Miter Module 14

Catalog No. Module No. of
teeth		 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.		 Face angle Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
m z A B C D E F G H I J K L Bending
strength		 Surface
durability		 Bending
strength		 Surface
durability

SUM1-20
[ DXF| DWG| 3D CAD]
SUM1.5-20
[ DXF| DWG| 3D CAD]
SUM2-20
[ DXF| DWG| 3D CAD]
SUM2.5-20
[ DXF| DWG| 3D CAD]
SUM3-20
[ DXF| DWG| 3D CAD]
 SUM4-20
[ DXF|DWG| 3D CAD]

 1

1.5

2

2.5

3

4

 20

20

20

20

20

20

 6

8

12

14

16

20

 16

26

34

42

50

64

 20

30

40

50

60

80

 21.41

32.12

42.83

53.54

64.24

85.65

 20

30

37

48

58

75

 13.95

21.24

24.89

32.54

39.84

50.78

 10.71

16.06

18.41

24.77

30.12

37.83

 8

13

14

19

23

27

 12

19

22

29

35

45

 5

8

10

12

15

20

 9.86

15.37

21.72

28.06

31.57

43.43

 4948'

4948'

4948'

4948'

4948'

4948'

 B3

B3

B3

B3

B3

B3

 0.0502

0.1757

0.4018

0.7664

1.356

3.215

 0.0061

0.022

0.0521

0.102

0.1838

0.4481

 0.4923

1.723

3.94

7.516

13.3

31.53

 0.0598

0.2157

0.5109

1

1.802

4.394

 0.030.13

0.050.15

0.060.16

0.070.17

0.080.18

0.120.27		 0.02

0.07

0.15

0.3

0.5

1.1

 SUM1-20

SUM1.5-20

SUM2-20

SUM2.5-20

SUM3-20

SUM4-20

Pitch Angle 45
25 Miter Module 14

Catalog No. Module No. of
teeth		 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.		 Face angle Shape Allowable
torque (kgfm)		 Allowable
torque (Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
m z A B C D E F G H I J K L Bending
strength		 Surface
durability		 Bending
strength		 Surface
durability
SUM1-25
[ DXF| DWG| 3D CAD]
SUM1.5-25
[ DXF| DWG| 3D CAD]
SUM2-25
[ DXF| DWG| 3D CAD]
SUM2.5-25
[ DXF| DWG| 3D CAD]
SUM3-25
[ DXF|DWG| 3D CAD]
SUM4-25
[ DXF|DWG| 3D CAD]		 1

1.5

2

2.5

3

4

 25

25

25

25

25

25

 6

10

12

16

20

28

 20

30

45

55

65

80

 25

37.5

50

62.5

75

100

 26.41

39.62

52.83

66.04

79.24

105.66

 23

34

40

50

60

80

 15.16

22.25

24.33

30.41

37.81

49.32

 11.21

16.31

16.41

20.52

24.62

32.83

 8

11.5

12.5

15

17.5

20

 14

19

20

26

32

43

 6

9

12

15

20

25

 15.03

19.54

26.06

34.57

37.43

55.29

 4851'

4851'

4851'

4851'

4851'

4851'

 B3

B3

B3

B3

B3

B3

 0.0828

0.2795

0.6624

1.294

2.373

5.427

 0.0118

0.0416

0.102

0.2039

0.3798

0.8964

 0.812

2.741

6.496

12.69

23.27

53.22

 0.1157

0.408

1

2

3.725

8.791

 0.030.13

0.050.15

0.060.16

0.070.17

0.080.18

0.120.27

 0.03

0.13

0.22

0.41

0.81

1.7

 SUM1-25

SUM1.5-25

SUM2-25

SUM2.5-25

SUM3-25

SUM4-25

Pitch Angle 45
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.
USEFUL HINT :

Stainless steel may be categorized into four types as martensite, ferrite, austenite and precipitate hardened. SUS303 and 304 belong to austenite family and cannot be hardened. To harden stainless steel, there are martensite series, such as SUS420J.

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