Surface Feet per Minute (SFM) Formula: SFM = 0.262 × D × RPM Tool Diameter (D) Spindle Speed (RPM) Calculate Reset SFM = —
Inches per Minute (IPM) Formula: IPM = CPT × Z × RPM Chip per Tooth (CPT) Number of Flutes (Z) Spindle Speed (RPM) Calculate Reset IPM = —
Revolutions per Minute (RPM) Formula: RPM = (3.82 × SFM) / D Surface Feet per Minute (SFM) Tool Diameter (D) Calculate Reset RPM = —