Module
0.5
Teeth
20
Teeth1
30
i ratio
1:1.5
A centre distance
11.9
A1
10.1
B
4
Tolerance (B)
H7
B1
4
Tolerance (B1)
H7
b tooth width
3
d
10
d1
15
da external diameter
10.8
da1
15.5
H
7
H1
7
L
6.5
L1
6
N
8
N1
10
n
3.5
n1
4