Nominal
Size

d

D
s

No. Tooth

kg/1000

min.

max.

min.

max.

min.

max.

4

4.3

4.48

7.64

8

0.475

0.525

8

0.13

5

5.1

5.28

8.64

9

0.475

0.525

8

0.15

5

5.3

5.48

9.64

10

0.575

0.625

8

0.246

6

6.4

6.62

10.57

11

0.67

0.73

9

0.31

7

7.4

7.62

12.07

12.5

0.77

0.83

10

0.43

8

8.2

8.42

13.57

14

0.77

0.83

10

0.55

8

8.4

8.62

14.57

15

0.77

0.83

10

0.67

9

9.55

9.77

15.57

16

0.77

0.83

10

0.762

10

10.5

10.77

17.57

18

0.87

0.93

12

1.07

11

11.5

11.77

18.98

19.5

0.87

0.93

12

1.22

12

13

13.27

19.98

20.5

0.97

1.03

12

1.38

13

13.2

13.27

21.48

22

0.97

1.03

12

1.72

14

15

15.27

23.48

24

0.97

1.03

14

1.95

16

17

17.27

25.48

26

1.165

1.235

13

2.62

18

19

19.33

29.48

30

1.365

1.435

13

4.302

20

21

21.33

32.38

33

1.365

1.435

15

5.08

22

23

23.33

35.38

36

1.465

1.535

15

6.45

24

25

25.33

37.38

38

1.465

1.535

15

6.951

26

26.4

26.73

39.38

40

1.555

1.645

15

8.365

27

28

28.33

43.38

44

1.555

1.645

16

10.319

30

31

31.39

47.38

48

1.555

1.645

17

12.395