TAPER-PIN REAMER DRILLS Machinery's Handbook, 31st Edition
1889
Chart to Facilitate Selection of Number and Sizes of Drills for Step-Drilling Prior to Taper Reaming
Drill dia.
Pin dia.
Length of Pin in Inches
1
2
3
4
5
6
0.0156 0.0312 0.0469 0.0625 0.0781 0.0938 0.1094 0.1250 0.1406 0.1562 0.1719 0.1875 0.2031 0.2188 0.2344 0.2500 0.2656 0.2812 0.2969 0.3125 0.3281 0.3438 0.3594 0.3750 0.3906 0.4062 0.4219 0.4375 0.4531 0.4688 0.4844 0.5000 0.5156 0.5312 0.5469 0.5625 0.5781 0.5938 0.6094 0.6250 0.6406 0.6562 0.6719 0.6875 0.7031
7/0
0.0625 0.0780 0.0940 0.1090 0.1250 0.1410 0.1560 0.1720 0.1930 0.2190 0.2500
6/0 5/0 4/0 3/0
2/0 0 1
2 3
4
5
6
0.2890
7
0.3410
8
0.4090
9
0.4920
10
0.5910
0.7060
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