Module
0.5
Teeth
20
Teeth1
40
i ratio
1:2
A centre distance
13.9
A1
11.7
B
4
Tolerance (B)
H7
B1
4
Tolerance (B1)
H7
b tooth width
3
d
10
d1
20
da external diameter
10.9
da1
20.5
H
6.75
H1
8.5
L
6.3
L1
7.5
N
8
N1
12
n
3.4
n1
5