MultiSpindle
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- MultiSpindle
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- Tap Drill Chart
Tap Drill Chart
| Tap Size | Thread Pitch | Drill Size | Aluminum | Mild Steel / Cast Iron** | Stainless Steel | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| N.C. | N.F. | Cut Thd. | Roll Thd. | RPM* | HP | RPM* | HP | RPM* | HP | |
| #0 | 80 | 3/64" | #54 | 3000 | 1/16 | 2000 | 1/16 | 1270 | 1/8 | |
| #2 | 56 | #50 | 5/64" | 3000 | 1/16 | 2000 | 1/16 | 750 | 1/8 | |
| #4 | 40 | #43 | #39 | 3000 | 1/16 | 2000 | 1/8 | 580 | 1/4 | |
| #6 | 32 | #34 | 1/8" | 3000 | 1/16 | 1870 | 1/8 | 470 | 1/4 | |
| #8 | 32 | #29 | #25 | 3000 | 1/16 | 1560 | 1/8 | 390 | 1/4 | |
| #10 | 24 | #23 | 11/64" | 1700 | 1/8 | 1360 | 1/4 | 340 | 1/3 | |
| #10 | 32 | #20 | #16 | 1800 | 1/8 | 1600 | 1/4 | 400 | 1/2 | |
| 1/4" | 20 | #6 | #1 | 1600 | 1/4 | 800 | 1/3 | 200 | 1/2 | |
| 1/4" | 28 | #3 | A | 1800 | 1/4 | 1200 | 1/4 | 300 | 1/3 | |
| 5/16" | 18 | G | 7.3mm | 1260 | 1/4 | 640 | 1/3 | 160 | 3/4 | |
| 5/16" | 24 | I | M | 1500 | 1/4 | 960 | 1/3 | 240 | 1/2 | |
| 3/8" | 16 | O | S | 1050 | 1/4 | 530 | 1/2 | 130 | 1 | |
| 3/8" | 24 | R | T | 1300 | 1/4 | 800 | 1/2 | 200 | 3/4 | |
| 7/16" | 14 | 3/8" | 13/32" | 1200 | 1/3 | 450 | 3/4 | 110 | 1 | |
| 1/2" | 13 | 27/64" | 15/32" | 800 | 1/3 | 400 | 3/4 | 100 | 1 | |
| 1/2" | 20 | 29/64" | 31/64" | 1200 | 1/3 | 600 | 3/4 | 150 | 3/4 | |
| 5/8" | 11 | 17/32" | 15.0mm | 640 | 1/2 | 320 | 1 | 80 | 1-1/2 | |
| 5/8" | 18 | 37/64" | 19/32" | 975 | 1/2 | 490 | 3/4 | 120 | 1 | |
| 3/4" | 10 | 21/32" | 45/64" | 540 | 1/2 | 266 | 1 | 66 | 2 | |
| 3/4" | 16 | 11/16" | 23/32" | 815 | 1/2 | 405 | 1 | 100 | 1-1/2 | |
| 7/8" | 9 | 49/64" | — | 460 | 3/4 | 230 | 1-1/2 | 56 | 2 | |
| 1" | 8 | 7/8" | — | 400 | 3/4 | 200 | 1-1/2 | 50 | 3 | |
| 1/16" NPT | 27 | D | — | 1500 | 1/8 | 1025 | 1/4 | 380 | 1/3 | |
| 1/8" NPT | 27 | R | — | 1200 | 1/4 | 900 | 1/2 | 300 | 1/2 | |
| 1/4" NPT | 18 | 7/16" | — | 1000 | 1/2 | 600 | 3/4 | 250 | 1 | |
| 3/8" NPT | 18 | 37/64" | — | 700 | 3/4 | 350 | 1 | 150 | 1-1/2 | |
| 1/2" NPT | 14 | 23/32" | — | 500 | 1 | 250 | 1-1/2 | 90 | 2 | |
| 3/4" NPT | 14 | 59/64" | — | 350 | 1-1/2 | 175 | 2 | 50 | 3 | |
Note: Pipe tap drill size without taper Pipe reamer.
* RPM not to exceed Max of Tapping Head.
** SAE 1020 / 1112, Hardness: 217 BHN / 20 Rc
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