Module
1
Teeth
18
Teeth1
45
i ratio
1:2.5
A centre distance
28.9
A1
21.4
B
5
Tolerance (B)
H7
B1
6
Tolerance (B1)
H7
b tooth width
5
d
18
d1
45
da external diameter
20.2
da1
45.6
H
11
H1
15
L
10
L1
13
N
13
N1
22
n
5
n1
8