Aluminum
800 SFM
243.8 m/min
Finder
Cutting Speed Finder
Select a material and tool type to get a practical starting cutting speed. Enter a tool or work diameter to turn that SFM into a quick spindle RPM estimate.
Starting point
Mild steel (1018) - Carbide
350 SFM
106.7 m/min
- Spindle speed
- 2,674 rpm
- Notes
- General low-carbon steel.
Material speed rows
Same source table as the printable cutting-speed chart.
Brass
600 SFM
182.9 m/min
Bronze
350 SFM
106.7 m/min
Cast iron (gray)
200 SFM
60.96 m/min
Mild steel (1018)
350 SFM
106.7 m/min
Alloy steel (4140)
250 SFM
76.2 m/min
Stainless (304)
200 SFM
60.96 m/min
Tool steel
175 SFM
53.34 m/min
Use this as a starting point
These values are baseline turning speeds. Use the SFM calculator for a full RPM workflow or the cutting speed chart for the static table.