The Woodturning Speed Formula by Billy Burt
To determine a safe starting speed, woodturners use a standard rule of thumb based on the
workpiece diameter (in inches):
- Minimum/Roughing Speed: 6,000/Diameter = RPM
- Maximum/Finishing Speed: 9,000/Diameter = RPM
Quick Reference Speed Chart
| Workpiece Diameter | Roughing / Out-of-Balance Speed |
Fine Cutting / Sanding Speed |
|---|---|---|
| 1″ – 2″ (Pens, Spindles) | 1,500 – 2,000 RPM | 2,500 – 3,000 RPM |
| 3″ – 5″ | 1,200 – 1,500 RPM | 1,800 – 2,200 RPM |
| 6″ – 10″ (Small Bowls) | 600 – 800 RPM | 800 – 1,000 RPM |
| 10″ – 14″ (Medium Bowls) | 400 – 600 RPM | 600 – 800 RPM |
| 14″+ (Large Bowls/Platters) |
200 – 300 RPM | 300 – 600 RPM |