This section is from the book "Machine Shop Work", by Frederick W. Turner, Oscar E. Perrigo, Howard P. Fairfield. Also available from Amazon: Machine shop work.
A | B | c | D | E | F | H | I | K |
1/8 | 5/16 | 1/2 | 1/8 | 5/8 | 5/8 | 1/8 | 1/2 | 1 /32 |
3/16 | 3/8 | 1/2 | 1/8 | 5/8 | 5/8 | 1/8 | 1/2 | 1/32 |
1/4 | 7/16 | 5/8 | 1/8 | 3/4 | 3/4 | 1/8 | 1/8 | 1/32 |
5/16 | 9/16 | 5/8 | 1/8 | 3/4 | 7/8 | 1/8 | 3/4 | 1/32 |
3/8 | 5/8 | 3/4 | 1/8 | 7/8 | 7/8 | 1/8 | 3/4 | 1/32 |
7/16 | 11/16 | 7/8 | 1/8 | 1 | 1 | 1/8 | 7/8 | 1/32 |
1/2 | 3/4 | 1 | 1/8 | 1 1/8 | 1 | 1/8 | 7/1 | 1/32 |
9/16 | 13/16 | 1 1/8 | 1/8 | 1 1/4 | 1 1/8 | 1/8 | 1 | 1/32 |
5/8 | 15/16 | 1 1/4 | 3/1 6 | 1 7/16 | 1 1/4 | 1/8 | 1 1/8 | 1/16 |
11/16 | 1 | 1 3/8 | 3/16 | 1 9/16 | 1 1/4 | I/8 | 1 1/8 | 1/16 |
3/4 | 1 1/16 | 1 1/2 | 3/16 | 1 11/16 | 1 3/8 | 1/8 | 1 1/4 | 1/16 |
13/16 | 1 1/8 | 1 1/2 | 3/16 | 1 11/16 | 1 3/8 | 1/8 | 1 1/4 | 1/16 |
7/8 | 1 1/4 | 1 5/8 | 3/16 | 1 13/16 | 1 1/2 | 1/8 | 1 3/8 | 1/16 |
1 5/16 | 1 5/16 | 1 3/4 | 3/16 | 1 15/16 | 1 5/8 | i/8 | 1 1/2 | 1/16 |
1 | 1 7/8 | 1/4 | 2 1/8 | 1 3/4 | 3/16 | 1 5/8 | 3/32 | |
l.1/16 | 1 7/16 | 2 | 1/4 | 2 1/4 | 1 7/8 | 3/16 | 1 3/4 | 3/32 |
1 1/8 | 1 9/16 | 2 1/8 | 1/4 | 2 3/8 | 2 | 3/16 | 1 13/16 | 3/32 |
1 1/4 | 1 5/8 | 2 1/8 | 1/4 | 2 3/8 | 2 | 3/16 | 1 13/16 | 3/32 |
1 1/4 | 1 3/4 | 2 1/4 | 5/16 | 2 9/16 | 2 1/8 | 3/16 | 1 15/l6 | 1/8 |
1 5/16 | 1 13/16 | 2 1/4 | 5/16 | 2 9/16 | 2 1/8 | 3/16 | 2 1/16 | 1/8 |
1 3/8 | 1 7/8 | 2 3/8 | 5/16 | 2 11/16 | 2 1/8 | 3/16 | 2 1/16 | 1/8 |
1 7/16 | 1 15/16 | 2 1/2 | 5/16 | 2 13/16 | 2 3/8 | 3/16 | 2 3/16 | 1/8 |
1 1/2 | 2 4/8 | 2 5/8 | 3/8 | 3 | 2 1/2 | 3/16 | 2 5/16 | 1/8 |
1 9/16 | 2 3/16 | 2 3/4 | 3/8 | 3 1/8 | 2 5/8 | 3/16 | 2 7/16 | 1/8 |
1 5/8 | 2 1/4 | 2 7/8 | 3/8 | 3 1/4 | 2 5/8 | 3/16 | 2 7/16 | 1/8 |
1 11/16 | 2 5/16 | 2 7/8 | 3/8 | 3 1/4 | 2 3/4 | 3/16 | 2 9/16 | 1/8 |
1 3/4 | 2 3/8 | 3 | 3/8 | 3 1/4 | 2 3/4 | 3/16 | 2 9/16 | 1/8 |
1 13/16 | 2 9/16 | 3 1/8 | 1/2 | 3 5/8 | 3 | 1/4 | 2 13/16 | 5/32 |
1 7/8 | 2 5/8 | 3 1/4 | 1/2 | 3 3/4 | 3 1/8 | 1/4 | 2 l5/1 6 | 5/32 |
1 15/16 | 2 11/16 | 3 3/8 | 1/2 | 3 7/8 | 3 1/8 | 1/4 | 2 l5/16 | 5/32 |
2 | 2 3/4 | 3 1/2 | 1/2 | 4 | 3 1/4 | 1/4 | 3 1/16 | 5/32 |
The soft body of the jig cannot be used to guide the drill if much service is required of the jig. In all production work, the guide holes for the drills are lined with hardened
♦Courtesy of "Machinery", New York City.
 
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