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PRM ENGLISH VALOR SYMBOL DATA UNIT PARAMETER TURNING MILLING DRILLING BROACHING D t Diameter of workpiece in turning INCHES Cuttin speed, fpm 0 0 0 Vc Dm Diameter of milling cutter INCHES Revolutions per minute ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#VALUE! / Dd Diameter of drill INCHES Feed rate, in/min 0 0 0 d Depth of cut INCHES Feed per tooth, in / ERROR:#DIV/0! d t Total depth per stroke in broaching INCHES Cutting time, min ERROR:#DIV/0! / f t E Efficiency of spindle drive Rate of metal removal, in3/min 0 0 0 0 f m Feed rate IN/MIN Horsepower required at spindle* 0 0 0 fr Feed IN/REVOLUTION Horsepower required at motor* ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! f t Feed IN/TOOTH Torque at spindle ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! / hp m Horsepower at motor hp s Horsepower at spindle L Length of cut INCHES Power Requirements in Machining English-Units n Number of teeth in cutter P Unit power HP/IN3*MIN Q Rate of metal remover IN3/MIN rpm Revolutions per minute of work or cutter Ts Torque at spindle INCH-POUNDS t Cutting time MINUTES Vc Cutting speed FT/MINUTES W Width of cut INCHES PRM METRIC VALOR SYMBOL DATA UNIT SYMBOL PARAMETER TURNING MILLING DRILLING BROACHING D t Diameter of workpiece in turning MILLIMETERS Vc Cuttin speed, fpm 0 0 0 Vc Dm Diameter of milling cutter MILLIMETERS rpm Revolutions per minute ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! / Dd Diameter of drill MILLIMETERS f m Feed rate, in/min 0 0 0 / d Depth of cut MILLIMETERS f t Feed per tooth, in / ERROR:#DIV/0! f t d t Total depth per stroke in broaching MILLIMETERS T Cutting time, min 0 ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! E Efficiency of spindle drive Q Rate of metal removal, in3/min 0 0 0 0 f m Feed rate MM/MINUTO kW s Horsepower required at spindle* 0 0 0 / fr Feed MM/REV kW m Horsepower required at motor* ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! f t Feed MM/TOOTH T s Torque at spindle ERROR:#DIV/0! ERROR:#DIV/0! ERROR:#DIV/0! / hp m Horsepower at motor kW hp s Horsepower at spindle kW L Length of cut MILLIMETERS Power Requirements in Machining Metric-Units n Number of teeth in cutter P Unit power kW/cm3*min Q Rate of metal remover cm3*min rpm Revolutions per minute of work or cutter Ts Torque at spindle Nm t Cutting time minutes Vc Cutting speed m/min W Width of cut MILLIMETERS TURNING Values Symbol Unit English System Description Metric System Values Symbol d in Depth of cut mm d D t in Workpiece Diameter mm D t E Efficiency of spindle drive E Fc lb Cutting force N Fc fr in Feed per revolution mm fr hpm 33000 lbF ft/min Horsepower at motor kW kWm hps Horsepower at spindle kW kWs P hp/in3* min Unit power kW/cm3*min P Q in3* min Metal removal rate cm3/min Q Ts in-lb Torque at spindle N*m Ts Vc fpm Cutting speed m/min Vc rpm revolution per minute rpm Determination Formula Determination Formula hp s 0 kWs 0 hpm ERROR:#DIV/0! kWm ERROR:#DIV/0! Q 0 Q 0 P ERROR:#DIV/0! P ERROR:#DIV/0! Ts 0 Ts 0 Ts ERROR:#DIV/0! Ts 0 DRILLING Values Symbol Unit English System Description Metric System Values Symbol Dd in Drill diameter mm Dd E Efficiency of spindle drive E Fr lb Feed N Fr hps Horsepower at spindle kW kWs hpm 33000 lbF ft/min Horsepower at motor kW kWm P hp/in3* min Unit power kW/cm3*min P Q in3* min Metal removal rate cm3/min Q Ts in-lb Torque at spindle N*m Ts Vc fpm Cutting speed m/min Vc rpm revolution per minute rpm Determination Formula Determination Formula hp s 0 kWs 0 hpm ERROR:#DIV/0! kWm ERROR:#DIV/0! Q 0 Q 0 P ERROR:#DIV/0! P ERROR:#DIV/0! Ts 0 Ts 0 MILLING Values Symbol English System Description Metric System Values Symbol d in Depth of cut mm d E Efficiency of spindle drive E f t inch/tooth Feed mm/tooth f t n Number of teeth in cutter n hpm 33000 lbF ft/min Horsepower at motor kW kWm hps Horsepower at spindle kW kWs P hp/in3* min Unit power kW/cm3*min P Q in3* min Metal removal rate cm3/min Q Ts in-lb Torque at spindle N*m Ts Vc fpm Cutting speed m/min Vc Fc lb Cutting force N Fc w in Width of cut mm w rpm revolution per minute rpm Determination Formula Determination Formula hp s 0 kWs 0 hpm ERROR:#DIV/0! kWm ERROR:#DIV/0! Q 0 Q 0 P ERROR:#DIV/0! P ERROR:#DIV/0! Ts ERROR:#DIV/0! Ts ERROR:#DIV/0!
