Precision Tools - Nachi
Precision Tools - Nachi
Precision Tools - Nachi
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Hobs<br />
Fine Pitch Gear Hobs�<br />
Standard Dimensions<br />
This table shows standard hob dimensions suitable in manufacture of small<br />
gears such as watch. �<br />
There are two types of Non-Topping and Topping.<br />
8 Type<br />
Module�<br />
�<br />
m<br />
0.1�<br />
0.15�<br />
0.2�<br />
0.25�<br />
0.3�<br />
0.35�<br />
0.4�<br />
0.45�<br />
0.5�<br />
0.55�<br />
0.6�<br />
0.65�<br />
0.7�<br />
0.75�<br />
0.8�<br />
�<br />
0.9�<br />
�<br />
1<br />
13 Type<br />
Module�<br />
�<br />
m<br />
0.2�<br />
0.25�<br />
0.3�<br />
0.35�<br />
0.4�<br />
0.45�<br />
0.5�<br />
0.55�<br />
0.6�<br />
0.65�<br />
0.7�<br />
0.75�<br />
0.8�<br />
�<br />
0.9�<br />
�<br />
1�<br />
�<br />
�<br />
1.25�<br />
1.5�<br />
1.75�<br />
2<br />
Diametral�<br />
Pitch�<br />
DP<br />
�<br />
�<br />
�<br />
96�<br />
�<br />
72�<br />
64�<br />
56�<br />
48�<br />
�<br />
44�<br />
40�<br />
36�<br />
�<br />
32�<br />
30�<br />
28�<br />
26�<br />
�<br />
Diametral�<br />
Pitch�<br />
DP<br />
�<br />
96�<br />
�<br />
72�<br />
64�<br />
56�<br />
48�<br />
�<br />
44�<br />
40�<br />
36�<br />
�<br />
32�<br />
30�<br />
28�<br />
26�<br />
�<br />
24�<br />
22�<br />
20�<br />
�<br />
Outside�<br />
Dia.�<br />
D<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24�<br />
24<br />
Outside�<br />
Dia.�<br />
D<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
40�<br />
40�<br />
40�<br />
40�<br />
40�<br />
40<br />
Overall�<br />
Length�<br />
L<br />
8�<br />
8�<br />
8�<br />
8�<br />
10�<br />
10�<br />
10�<br />
10�<br />
10�<br />
10�<br />
12�<br />
12�<br />
12�<br />
12�<br />
12�<br />
12�<br />
12�<br />
12�<br />
12<br />
Overall�<br />
Length�<br />
L<br />
12�<br />
12�<br />
12�<br />
12�<br />
15�<br />
15�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
25�<br />
25�<br />
25�<br />
25�<br />
30�<br />
30<br />
Bore�<br />
Diameter�<br />
d<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
8<br />
Bore�<br />
Diameter�<br />
d<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
13<br />
Unit : mm<br />
No. of�<br />
Flutes�<br />
N<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
12<br />
Unit : mm<br />
No. of�<br />
Flutes�<br />
N<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
12�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
10<br />
10 Type<br />
Module�<br />
�<br />
m<br />
0.2�<br />
0.25�<br />
0.3�<br />
0.35�<br />
0.4�<br />
0.45�<br />
0.5�<br />
0.55�<br />
0.6�<br />
0.65�<br />
0.7�<br />
0.75�<br />
0.8�<br />
�<br />
0.9�<br />
�<br />
1�<br />
�<br />
�<br />
1.25�<br />
1.5�<br />
1.75�<br />
2<br />
Diametral�<br />
Pitch�<br />
DP<br />
�<br />
96�<br />
�<br />
72�<br />
64�<br />
56�<br />
48�<br />
�<br />
44�<br />
40�<br />
36�<br />
�<br />
32�<br />
30�<br />
28�<br />
26�<br />
�<br />
24�<br />
22�<br />
20�<br />
�<br />
Outside�<br />
Dia.�<br />
D<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
32�<br />
40�<br />
40�<br />
40�<br />
40�<br />
40�<br />
40<br />
Overall�<br />
Length�<br />
L<br />
12�<br />
12�<br />
12�<br />
12�<br />
15�<br />
15�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
20�<br />
25�<br />
25�<br />
25�<br />
25�<br />
30�<br />
30<br />
Bore�<br />
Diameter�<br />
d<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
10<br />
Unit : mm<br />
No. of�<br />
Flutes�<br />
N<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
12�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
�<br />
10<br />
20<br />
Fine Pitch Gear Hobs Standard Dimensions Hobs<br />
Gear Cutting <strong>Tools</strong>
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