Free Milling RPM
Calculate spindle speed (RPM) for milling operations based on Surface Feet per Minute (SFM) and tool diameter. Critical for CNC machining.
Configuration
How to Use
- Enter the SFM (Surface Feet per Minute) recommended for the material.
- Enter the Tool Diameter in inches.
- The tool calculates the Spindle RPM.
Common Use Cases
- CNC
Frequently Asked Questions
Where do I find SFM?
SFM is provided by the tool manufacturer or material handbook. It varies by material (e.g., Aluminum is faster than Steel).
What happens if RPM is too high?
Excessive RPM generates heat that burns the tool. Too low, and the tool may rub instead of cut.