Module
1
Teeth
20
Teeth1
40
i ratio
1:2.5
A centre distance
68
A1
48.6
B
12
Tolerance (B)
H7
B1
25
Tolerance (B1)
H7
b tooth width
20
d
50
d1
100
da external diameter
54.2
da1
101.9
H
36.6
H1
33.9
L
33
L1
30
N
35
N1
6
n
14.3
n1
15