A-A-50968
TABLE II. Sizes and capacities of type II chucks.
Size number |
Nominal capacity, inches |
Jacobs taper |
Chuck dimensions, inches |
|
Length with jaw closed not less than |
Diameter not less than |
|||
1 |
0-1/8 |
5/16-24 |
1-7/8 |
15/16 |
2 |
0-3/16 |
5/16-24 |
2-7/16 |
1-3/16 |
3 |
0-1/4 |
5/16-24 |
2-11/16 |
1-11/32 |
4 |
0-1/4 |
3/8-24 |
2-1/16 |
1-9/64 |
5 |
0-1/4 |
3/8-24 |
2-21/32 |
1-1/4 |
6 |
0-1/4 |
1/2-20 |
2-23/64 |
1-19/64 |
7 |
0-1/4 |
1/2-20 |
2-11/16 |
1-11/32 |
8 |
0-5/16 |
3/8-24 |
2-23/64 |
1-19/64 |
9 |
0-5/16 |
3/8-24 |
2-63/64 |
1-3/8 |
10 |
0-5/16 |
1/2-20 |
2-23/64 |
1-19/64 |
11 |
0-5/16 |
1/2-20 |
2-63/64 |
1-31/64 |
12 |
0-3/8 |
1/2-20 |
3-19/32 |
1-11/16 |
13 |
0-3/8 |
5/8-16 |
3-19/32 |
1-11/16 |
14 |
1/32-1/2 |
1/2-20 |
2-7/8 |
1-21/32 |
15 |
l/32-l/2 |
1/2-20 |
3-19/32 |
1-37/64 |
16 |
1/32-1/2 |
1/2-20 |
4-1/16 |
1-31/32 |
17 |
1/32-1/2 |
5/8-16 |
3-27/64 |
2-1/128 |
18 |
1/32-1/2 |
5/8-16 |
4-1/16 |
1-31/32 |
19 |
1/32-1/2 |
5/8-16 |
4-51/64 |
1-51/64 |
20 |
1/32-1/2 |
3/4-16 |
4-1/16 |
1-31/32 |
21 |
1/16-3/8 |
3/8-24 |
2-63/64 |
1-31/64 |
22 |
1/16-3/8 |
1/2-20 |
2-63/64 |
1-31/64 |
23 |
1/16-1/2 |
1/2-20 |
3-19/32 |
l-37/64 |
24 |
1/8-5/8 |
5/8-16 |
4-5/64 |
1-51/64 |
25 |
1/8-5/8 |
3/4-16 |
4-9/32 |
2-7/32 |
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