Module
0.5
Teeth
15
Teeth1
45
i ratio
1:3
A centre distance
15.3
A1
11
B
3
Tolerance (B)
H7
B1
4
Tolerance (B1)
H7
b tooth width
3
d
7.5
d1
22.5
da external diameter
8.4
da1
22.8
H
7
H1
8.5
L
6.5
L1
7.5
N
6
N1
12
n
3.7
n1
5