Precision Tools - Nachi
Precision Tools - Nachi
Precision Tools - Nachi
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Solid Gear Hobs Standard Dimensions Hobs<br />
Gear Cutting <strong>Tools</strong><br />
Hobs<br />
Solid Gear Hobs�<br />
Standard Dimensions<br />
This table shows standard hob dimensions suited for gear cutting.�<br />
NACHI can also manufacture various sizes of solid hobs.<br />
19<br />
Module�<br />
m<br />
�<br />
1�<br />
�<br />
1.25�<br />
�<br />
1.5�<br />
1.75�<br />
2�<br />
2.25�<br />
2.5�<br />
2.75�<br />
3�<br />
3.25�<br />
3.5�<br />
3.75�<br />
4�<br />
4.5�<br />
5�<br />
5.5�<br />
6�<br />
6.5�<br />
7�<br />
8�<br />
9�<br />
10�<br />
11�<br />
12�<br />
�<br />
14�<br />
�<br />
16�<br />
18�<br />
20�<br />
22�<br />
25<br />
Diametral Pitch�<br />
DP<br />
26�<br />
24�<br />
22�<br />
20�<br />
18�<br />
16�<br />
14�<br />
12�<br />
11�<br />
10�<br />
9�<br />
8�<br />
�<br />
�<br />
7�<br />
6�<br />
5�<br />
5�<br />
4�<br />
�<br />
4�<br />
3�<br />
3�<br />
2�<br />
2�<br />
2�<br />
�<br />
2�<br />
�<br />
1�<br />
1�<br />
�<br />
1�<br />
�<br />
1<br />
1�<br />
2�<br />
�<br />
�<br />
1�<br />
2�<br />
�<br />
�<br />
1�<br />
2�<br />
�<br />
�<br />
3<br />
4�<br />
1� �<br />
2�<br />
�<br />
1� �<br />
4�<br />
�<br />
�<br />
3�<br />
4�<br />
�<br />
1�<br />
�<br />
2�<br />
�<br />
�<br />
1�<br />
4�<br />
�<br />
�<br />
Outside Dia.�<br />
D<br />
50�<br />
50�<br />
50�<br />
50�<br />
55�<br />
55�<br />
55�<br />
60�<br />
60�<br />
65�<br />
65�<br />
70�<br />
70�<br />
75�<br />
80�<br />
85�<br />
90�<br />
95�<br />
100�<br />
105�<br />
110�<br />
115�<br />
120�<br />
125�<br />
130�<br />
140�<br />
150�<br />
170�<br />
170�<br />
190�<br />
190�<br />
210�<br />
220�<br />
230�<br />
250<br />
Overall Length�<br />
L<br />
50�<br />
50�<br />
50�<br />
50�<br />
55�<br />
55�<br />
55�<br />
60�<br />
60�<br />
65�<br />
65�<br />
70�<br />
70�<br />
75�<br />
75�<br />
80�<br />
85�<br />
90�<br />
95�<br />
100�<br />
110�<br />
115�<br />
130�<br />
145�<br />
160�<br />
175�<br />
190�<br />
200�<br />
210�<br />
220�<br />
230�<br />
250�<br />
270�<br />
300�<br />
320<br />
�<br />
�<br />
�<br />
�<br />
�<br />
22�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
27�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
32�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
40�<br />
�<br />
�<br />
�<br />
�<br />
50<br />
Bore Diameter (d)<br />
Type A Type B<br />
�<br />
�<br />
�<br />
�<br />
�<br />
22.225�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
26.988�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
31.75�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
38.1�<br />
�<br />
�<br />
�<br />
�<br />
50.8<br />
Unit : mm<br />
No. of Flutes�<br />
N<br />
�<br />
�<br />
�<br />
12�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
10�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
9�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
8
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