Aprovechando la potencia y el torque (hierro fundido)

Tamaño de broca para roscar, RPM, caballos de fuerza y torque para el roscado de hierro fundido, incluyendo machuelos para tubería NPT, a 100 SFM.

Las especificaciones de potencia y torque de los machos para tubería se basan en un orificio cónico. Si el orificio es recto, multiplique por tres.

Tapping horsepower and torque (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)
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