Calculator
Speed and feed calculator
n = Vc × 1000 / (π × D). Starting values; adjust for your machine and cooling.
Speed
Feed
Feed rate
Tapping drill sizes for metric threads
| Thread | Pitch (mm) | Drill (mm) |
|---|---|---|
| M3 | 0.5 | Ø 2.5 |
| M4 | 0.7 | Ø 3.3 |
| M5 | 0.8 | Ø 4.2 |
| M6 | 1.0 | Ø 5.0 |
| M8 | 1.25 | Ø 6.8 |
| M10 | 1.5 | Ø 8.5 |
| M12 | 1.75 | Ø 10.2 |
| M14 | 2.0 | Ø 12.0 |
| M16 | 2.0 | Ø 14.0 |
| M20 | 2.5 | Ø 17.5 |
| M24 | 3.0 | Ø 21.0 |