Page 311 - Demo

309FORMULAS AND DEFINITIONSFeed Rate (vf)Feed rate or penetration rate is the speed at which the drill advances into the material, measured in millimeters per minute (mm/min) or inches per minute (in/min).vf = f %u00d7 nWhen:vf = feed rate (mm/min)f = feed per revolution (mm/rev)n = rotation velocity of the drill (RPM)Feed per Revolution (fn)Feed per revolution is the distance the drill advances into the material with each revolution of the spindle. It is typically measured in millimeters per revolution (mm/rev) or inches per revolution (in/rev).Formula:fn = vf n When:fn = feed per revolution (mm/rev)vf = feed rate (mm/min)n = rotation velocity of the drill (RPM)