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Cutting Speeds Table #3 Chart
June 12th, 2012
posted by AutoDrill
CuttingSpeedsTableNo3Chart.pdf
Table No. 3 – Tapping, MM of one (cast iron) |
SIZE |
SERIES |
TAP DRILL 75% |
RPM @ 100 S.F.M. |
HP @ 100 S.F.M. |
TORQUE IN-LBS. |
6-32 |
UNC |
.1077 |
2775 |
.19 |
4.4 |
6-40 |
UNF |
.1138 |
2775 |
.12 |
2.9 |
8-32 |
UNC |
.1337 |
2335 |
.2 |
5.4 |
8-36 |
UNF |
.137 |
2335 |
.16 |
4.3 |
10-24 |
UNC |
.149 |
2016 |
.35 |
10.9 |
10-32 |
UNF |
.1597 |
2016 |
.2 |
6.4 |
12-24 |
UNC |
.175 |
1773 |
.36 |
12.6 |
12-28 |
UNF |
.1813 |
1773 |
.27 |
9.5 |
1/4-20 |
UNC |
.2115 |
1532 |
.51 |
21 |
1/4-28 |
UNF |
.2153 |
1532 |
.27 |
11 |
5/16-18 |
UNC |
.2589 |
1226 |
.64 |
33 |
5/16-24 |
UNF |
.2715 |
1226 |
.37 |
19.1 |
3/8-16 |
UNC |
.3144 |
1021 |
.82 |
50 |
3/8-24 |
UNF |
.334 |
1021 |
.38 |
23.3 |
7/16-14 |
UNC |
.3681 |
875.5 |
1.1 |
77 |
7/16-20 |
UNF |
.3890 |
875.5 |
.54 |
39 |
1/2-13 |
UNC |
.4251 |
766 |
1.25 |
102.6 |
1/2-20 |
UNF |
.4515 |
766 |
.55 |
45 |
9/16-12 |
UNC |
.4817 |
681 |
1.5 |
136 |
9/16-18 |
UNF |
.5089 |
681 |
.68 |
62.5 |
5/8-11 |
UNC |
.5365 |
613 |
1.75 |
180 |
5/8-18 |
UNF |
.5714 |
613 |
.68 |
70 |
3/4-10 |
UNC |
.6562 |
511 |
2.1 |
264 |
3/4-16 |
UNF |
.6894 |
511 |
.87 |
107 |
7/8-9 |
UNC |
.7667 |
438 |
2.7 |
382 |
7/8-14 |
UNF |
.8056 |
438 |
1.1 |
163 |
1″-8 |
UNC |
.8781 |
383 |
3.4 |
553 |
1-12 |
UNF |
.9192 |
383 |
1.5 |
253 |
1 1/8-7 |
UNC |
.9857 |
340 |
4.4 |
812 |
1 1/8-12 |
UNF |
1.0442 |
340 |
1.6 |
286 |
1 1/4-7 |
UNC |
1.1107 |
306 |
4.4 |
910 |
1 1/4-12 |
UNF |
1.1692 |
306 |
1.6 |
320 |
1 3/8-6 |
UNC |
1.2125 |
279 |
6 |
1356 |
1 3/8-12 |
UNF |
1.2942 |
279 |
1.6 |
353 |
1 1/2-6 |
UNC |
1.3375 |
255 |
6 |
1489 |
1 1/2-12 |
UNF |
1.4192 |
255 |
1.6 |
387 |
1 3/4-5 |
UNC |
1.5552 |
219 |
8.7 |
2496 |
2″-4 1/2 |
UNC |
1.7836 |
191 |
10.7 |
3530 |
2 1/4-4 1/2 |
UNC |
2.0336 |
170 |
10.8 |
4005 |
2 1/2-4 |
UNC |
2.2565 |
153 |
13.7 |
5628 |
2 3/4-4 |
UNC |
2.5065 |
139 |
13.8 |
6230 |
3″-4 |
UNC |
2.7565 |
127 |
13.8 |
6831 |
3 1/4-4 |
UNC |
3.0065 |
118 |
13.9 |
7433 |
3 1/2-4 |
UNC |
3.2565 |
109 |
13.95 |
8035 |
3 3/4-4 |
UNC |
3.5065 |
102 |
14 |
8636 |
4″-4 |
UNC |
3.7565 |
96 |
14 |
9238 |
PIPE TAPS (TAPER)
The following H.P. and Torque specs are based on tapered hole. If hole is straight, multiply by (3) three. |
1/8-27 |
NPT |
R |
948 |
.54 |
36 |
1/4-18 |
NPT |
7/16 |
706 |
1.17 |
103 |
3/8-18 |
NPT |
37/64 |
565 |
1.69 |
133 |
1/2-14 |
NPT |
23/32 |
455 |
2.00 |
277 |
3/4-14 |
NPT |
59/64 |
364 |
2.06 |
356 |
1-11 1/2 |
NPT |
1 5/32 |
291 |
3.07 |
663 |
1 1/4-11 1/2 |
NPT |
1 1/2 |
231 |
3.48 |
950 |
1 1/2-11 1/2 |
NPT |
1 47/64 |
201 |
4.08 |
1280 |
2-11 1/2 |
NPT |
2 7/32 |
161 |
5.31 |
2080 |