Module
4
Teeth
18
Teeth1
45
i ratio
1:2.5
A centre distance
108
A1
73.2
B
20
Tolerance (B)
H7
B1
35
Tolerance (B1)
H7
b tooth width
30
d
72
d1
180
da external diameter
79.2
da1
183.1
H
46.9
H1
50.8
L
41
L1
45
N
50
N1
90
n
13.7
n1
25