Machinery's Handbook, 31st Edition
Twist Drills
951
118°
D
L A Drill Diameter 11/32 ” (8.737 mm and Smaller F
118° Chamfer
60% of Drill Diameter D
A
L Drill Diameter 3/8 ” (9.525 mm) and Larger F
Table 7. American National Standard Three- and Four-Flute Taper- Shank Core Drills — Fractional Sizes Only ANSI/ASME B94.11M-1993 Drill Diameter, D Three-Flute Drills Four-Flute Drills
Equivalent
Flute Length Overall Length Morse Taper No. F L
Flute Length Overall Length
Morse Taper No.
F
L
Decimal Inch
mm
A Inch
mm
Inch
mm 156 159 162 165 171 178 184 190 210 216 222 222 222 229 235 241 248 251 273 273 273 273 273 279 279 283 286 318 324 327 330 333 343
A Inch mm
Inch
mm
Inch
0.2500 6.350 0.2812 7.142 0.3175 7.938
1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4
73 76 79 83 89 92 98
… … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … … …
2 7 ⁄ 8
6 1 ⁄ 8 6 1 ⁄ 4 6 3 ⁄ 8 6 1 ⁄ 2 6 3 ⁄ 4 7 1 ⁄ 4 7 1 ⁄ 2 8 1 ⁄ 4 8 1 ⁄ 2 7 8 3 ⁄ 4 8 3 ⁄ 4 8 3 ⁄ 4 9 1 ⁄ 4 9 1 ⁄ 2 9 3 ⁄ 4 9 7 ⁄ 8 9
1 ⁄ 4
3
9 ⁄ 32 5 ⁄ 16
3 1 ⁄ 8 3 1 ⁄ 4 3 1 ⁄ 2 3 5 ⁄ 8 3 7 ⁄ 8
11 ⁄ 32 0.3438 8.733
0.3750 9.525
3 ⁄ 8
13 ⁄ 32 0.4062 10.319
0.4375 11.112
7 ⁄ 16
15 ⁄ 32 0.4688 11.908
4 1 ⁄ 8 105 4 3 ⁄ 8 111 4 5 ⁄ 8 117 4 7 ⁄ 8 124 4 7 ⁄ 8 124 4 7 ⁄ 8 124 5 1 ⁄ 8 130 5 3 ⁄ 8 137 5 5 ⁄ 8 143 5 7 ⁄ 8 149 6 152 6 1 ⁄ 8 156 6 1 ⁄ 8 156 6 1 ⁄ 8 156 6 1 ⁄ 8 156 6 1 ⁄ 8 156 6 3 ⁄ 8 162 6 3 ⁄ 8 162 6 1 ⁄ 2 165 6 5 ⁄ 8 168 6 7 ⁄ 8 175 7 1 ⁄ 8 181 7 1 ⁄ 4 184 7 3 ⁄ 8 187 7 1 ⁄ 2 190 7 7 ⁄ 8 200
0.5000 12.700
2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4
111 8 1 ⁄ 4 117 8 1 ⁄ 2 124 8 3 ⁄ 4 124 8 3 ⁄ 4 124 8 3 ⁄ 4 130 9 137 9 1 ⁄ 4 143 9 1 ⁄ 2 149 9 3 ⁄ 4 156 10 3 ⁄ 4 156 10 3 ⁄ 4 156 10 3 ⁄ 4 156 10 3 ⁄ 4 156 10 3 ⁄ 4 162 11 162 11 165 11 1 ⁄ 8 168 11 1 ⁄ 4 175 12 1 ⁄ 2 181 12 3 ⁄ 4 184 12 7 ⁄ 8 187 13 190 13 1 ⁄ 8 200 13 1 ⁄ 2 216 14 1 ⁄ 8
210 216 222 222 222 229 235 241 248 251 273 273 273 273 273 279 279 283 286 318 324 327 330 333 343 359
4 3 ⁄ 8 4 5 ⁄ 8 4 7 ⁄ 8 4 7 ⁄ 8 4 7 ⁄ 8 5 1 ⁄ 8 5 3 ⁄ 8 5 5 ⁄ 8 5 7 ⁄ 8 6 1 ⁄ 8 6 1 ⁄ 8 6 1 ⁄ 8 6 1 ⁄ 8 6 1 ⁄ 8 6 3 ⁄ 8 6 3 ⁄ 8 6 1 ⁄ 2 6 5 ⁄ 8 6 7 ⁄ 8 7 1 ⁄ 8 7 1 ⁄ 4 7 3 ⁄ 8 7 1 ⁄ 2 7 7 ⁄ 8 8 1 ⁄ 2
1 ⁄ 2
17 ⁄ 32 0.5312 13.492
0.5625 14.288
9 ⁄ 16
19 ⁄ 32 0.5938 15.083
0.6250 15.815
5 ⁄ 8
21 ⁄ 32 0.6562 16.668 11 ⁄ 16 0.6875 17.462 23 ⁄ 32 0.7188 18.258 25 ⁄ 32 0.7812 19.842 13 ⁄ 16 0.8125 20.638 27 ⁄ 32 0.8438 21.433 3 ⁄ 4 0.7500 19.050 29 ⁄ 32 0.9062 23.019 15 ⁄ 16 0.9375 23.812 31 ⁄ 32 0.9688 24.608 1 1 ⁄ 32 1.0312 26.192 1 1 ⁄ 16 1.0625 26.988 1 3 ⁄ 32 1.0938 27.783 7 ⁄ 8 0.8750 22.225 1 1.0000 25.400 1 5 ⁄ 32 1.1562 29.367 1 3 ⁄ 16 1.1875 30.162 1 7 ⁄ 32 1.2188 30.958 1 1 ⁄ 8 1.1250 28.575
6 152 9 7 ⁄ 8
10 3 ⁄ 4 10 3 ⁄ 4 10 3 ⁄ 4 10 3 ⁄ 4 10 3 ⁄ 4 11 1 ⁄ 8 11 1 ⁄ 4 12 1 ⁄ 2 12 3 ⁄ 4 12 7 ⁄ 8 13 1 ⁄ 8 13 1 ⁄ 2 11 11 13
1.2500 31.750
1 1 ⁄ 4
1 9 ⁄ 32 1.2812 32.542
… … … … … 4
Copyright 2020, Industrial Press, Inc.
ebooks.industrialpress.com
Made with FlippingBook - Share PDF online