SFPM

From Open Source Ecology
Jump to: navigation, search
  • SUrface feet per minute - how fast a cutting edge travels in a workpiece
  • Carbide burrs are up to 3000 sfpm [1]
    • 3000*12/(3*0.25)=36k/.75=20-40k rpm
    • RPM = (SFPM) (12) divided by (3.14) (DIAMETER)