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 Grade N9 (JIS B 1702-1:1998)
JIS Grade 5 (JIS B 1702:1976)		 Core hardness HRR115120
Gear teeth Standard full depth Surface hardness
Pressure angle 20 Surface treatment -
Material MC601st Nylon with
S45c Steel core		 Surface finish Hobbed
Heat treatment - Datum reference
surface for gear cutting		 Bore

S1

Module 1

Catalog No. Module No. of teeth Bore Hub dia. Pitch dia. Outside dia. Face width Hub width Total length Metal core dia. Shape Allowable
torque(kgfm)		 Allowable
torque(Nm)		 Backlash
(mm)		 Weight
(kgf)		 Catalog No.
m z AH7 B C D E F G H Bending
strength		 Bending
strength
NSU1-30
[ DXF| DWG| 3D CAD]
NSU1-32
[ DXF| DWG| 3D CAD]
NSU1-34
[ DXF| DWG| 3D CAD]
NSU1-35
[ DXF| DWG| 3D CAD]
NSU1-36
[ DXF| DWG| 3D CAD]		 1

1

1

1

1		 30

32

34

35

36		 8

8

8

8

8		 20

22

25

25

25		 30

32

34

35

36		 32

34

36

37

38		 10

10

10

10

10		 10

10

10

10

10		 20

20

20

20

20		 20

22

25

25

25		 S1

S1

S1

S1

S1		 0.1443

0.1567

0.1694

0.176

0.1827		 1.415

1.537

1.661

1.726

1.792		 0.120.26

0.120.26

0.120.26

0.120.26

0.120.26		 0.05

0.06

0.08

0.08

0.08		 NSU1-30

NSU1-32

NSU1-34

NSU1-35

NSU1-36
NSU1-40
[ DXF| DWG| 3D CAD]
NSU1-45
[ DXF| DWG| 3D CAD]
NSU1-48
[ DXF| DWG| 3D CAD]
NSU1-50
[ DXF| DWG| 3D CAD]
NSU1-60
[ DXF| DWG| 3D CAD]		 1

1

1

1

1		 40

45

48

50

60		 10

10

10

10

10		 25

30

30

30

40		 40

45

48

50

60		 42

47

50

52

62		 10

10

10

10

10		 10

10

10

10

10		 20

20

20

20

20		 28

28

34

34

45		 S1

S1

S1

S1

S1		 0.2085

0.2412

0.2615

0.2753

0.3395		 2.045

2.365

2.564

2.7

3.329		 0.120.26

0.120.26

0.120.26

0.120.26

0.140.28		 0.08

0.12

0.13

0.13

0.23		 NSU1-40

NSU1-45

NSU1-48

NSU1-50

NSU1-60
NSU1-70
[ DXF| DWG| 3D CAD]
NSU1-80
[ DXF| DWG| 3D CAD]
NSU1-90
[ DXF| DWG| 3D CAD]
NSU1-100
[ DXF| DWG| 3D CAD]		 1

1

1

1		 70

80

90

100		 10

10

10

10		 40

40

40

40		 70

80

90

100		 72

82

92

102		 10

10

10

10		 10

10

10

10		 20

20

20

20		 45

45

55

65		 S1

S1

S1

S1		 0.4042

0.4694

0.5343

0.6007		 3.964

4.603

5.24

5.891		 0.140.28

0.140.28

0.140.28

0.140.28		 0.24

0.25

0.32

0.4		 NSU1-70

NSU1-80

NSU1-90

NSU1-100
 

CAUTION: Although the holding strength at the material interface is designed to be stronger than the teeth, a secondary operation may weaken the holding strength.

CAUTION: When the core O.D. is the same as the hub diameter, you may see some serration on the hub. There is no effect on the strength of the gear due to these serrations.

NOTE: The allowable torques shown in the table are calculated using the Lewis formula. The backlash values shown are the theoretical values of a pair of identical gears in mesh. All dimensions shown in the above table(s) are listed in millimeters unless otherwise specified.

Definition of holding strength and safety factor

1.The holding strength between the metal core and the molded material is a function of the contact area. The relationship between the core outside diameter and the radial strength (torque) is shown on the left, while the relationship between the core diameter and the resistant thrust force is shown on the right.


Relationship between radial strength and core diameter
Relationship between resistant thrust force and core diameter

2.When the ambient temperature rises, obtain the temperature compensation factor, T, from the chart below. Also, use a safety factor of 4 or 5 in the calculation.

where
Tal = Allowable holding strength at the contact surface
Tmax = Radial strength from the chart on the left
T = Temperature compensation factor from the chart on the right


Ambient temperature compensation factor T

 

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