Japanese Standard Gear Hobs
(JIS B 4354)


14.5°or 20°Pressure angle.
Hob hole tolerance
Non-topping.
Class
Hole Dia.
<32
>32
0(AA)
H5
(H6)
1(A)
H6
2(B)
3(C)
H6
Single thread .
Right or left hand
Range supplied :Module 1~20
It is better to design with inserted blade hobs for Module > 10 mm.
Keyway to JIS B 4201.
Finishing Standard Depth

 

                              Unit:mm

Module
模 数
Diametral
Pitch
径 节
Outside
Dia.
外 径
Overall
Length
全 长
Hole
Dia.
孔 径
1
26.24
50
50
22
(22.225)
1.25
22.20
1.5
18.16
55
55
1.75
14
2
12
60
60
2.25
11
2.5
10
65
65
2.75
9
3
8
70
70
27
(26.988
25.4)
3.25
3.5
75
75
3.75
7
80
75
4
6
85
80
4.5
5 1/2
90
85
5
5
95
90
5.5
4 1/2
100
95
32
(31.75)
6
105
100
6.5
4
110
110
7
3 1/2
115
115
8
3
120
130
9
2 3/4
125
145
10
2 1/2
130
160
11
2 1/4
150
175
40
(38.1)
12
160
190
13
2
200
14
180
210
16
1 1/2
200
230
18
1 1/4
220
250
50
(50.8)
20
240
270
22
1
250
300
25
270
320

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