Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

1

76

76

31.743

10

1.25

15

1.25

60

75

1.5

50

75

1.75

43

75.25

17

2

38

76

2.25

34

76.5

2.5

30

75

2.75

28

77

3

25

75

20

3.25

24

78

3.5

22

77

3.75

20

75

4

19

76

Nominal pitch diameter Φ100mm    α20° 

 mm

Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

1

100

100

31.743

10

1.25

18

1.25

80

100

1.5

68

102

1.75

58

101.5

12

22

2

50

100

2.25

45

101.25

2.5

40

100

2.75

36

99

3

34

102

3.25

31

100.75

3.5

29

101.5

24

3.75

27

101.25

4

25

100

4.5

22

99

1.3

5

20

100

5.5

19

104.5

6

18

108

Nominal pitch diameter Φ125mm    α20° 

 mm

Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

4

31

124

31.743

13

1.3

30

4.5

28

126

5

25

125

5.5

23

126.5

6

21

126

6.5

19

123.5

7

18

126

8

16

128

 Nominal pitch diameter Φ160mm   α20° 

 mm

Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

6

27

162

88.9

18

1.25

35

6.5

25

162.5

7

23

161

8

20

160

9

18

162

10

16

160

Nominal pitch diameter Φ200mm   α20° 

 mm

Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

8

25

200

101.6

20

1.25

40

9

22

198

10

20

200

11

18

198

12

17

204

Nominal pitch diameter Φ240mm     α20° 

 mm

Module
m

No.of teeth
z

Pitch dia
d

Diameter of
Hole
d

Thickness of
Hole
b

Thickness
ha*

Thickness
B

14

17

238

101.6

20

1.25

45

16

15

240