M24×3.0 tap drill size
Use a 21.0mm drill (21.00 mm) for a M24×3.0 cutting tap at 75% thread.
| Tap type | Drill | Decimal (mm) |
|---|---|---|
| Cutting tap, 75% thread | 21.0mm | 21.00 |
| Cutting tap, 50% thread (hard material) | 22.0mm | 22.00 |
| Roll / form tap, 65% thread | 22.65 mm | 22.65 |
| Helicoil / STI insert (M24×3.0×1D) | 25.5mm | 25.50 |
- Pitch
- 3 mm
- Major Ø
- 24.00
- Pitch Ø
- 22.05
- Minor Ø
- 20.75
M24×3.0 tapping speeds and feeds
Feed = pitch (3 mm per rev). Starting points for a general-purpose HSS cut tap:
- Aluminum 6061 / 7075: 280 RPM · 840 mm/min
- Free-machining / mild steel: 80 RPM · 240 mm/min
- 304 / 316 stainless: 40 RPM · 120 mm/min
M24×3.0 tap speeds and feeds: all materials, form taps and G84 code
Common questions
- What size drill for a M24×3.0 tap?
- Use a 21.0mm drill (21.00 mm) for a M24×3.0 cutting tap at 75% thread.
- What drill for a M24×3.0 roll (form) tap?
- About 22.67 mm; the nearest standard drill is 22.65 mm. Check your tap maker's table.
- What drill for a M24×3.0 Helicoil?
- Drill 25.5mm (25.50 mm), then tap with the M24×3.0 STI tap.
Other Metric sizes
Drill sizes from Machinery's Handbook and ASME B1.1/B1.13M; roll tap sizes from the form-tap formula. Tap and insert makers' tables are authoritative.
Free for machinists & programmers
Put your skills on a free talent profile
Machines, controls, certs and saved calculations in one profile shops can find.
Create free profile For your shop
Bring shift handoffs to your shop
Stop losing job status between shifts. Every station's notes, counts and issues, handed off cleanly.
See shift handoffs