Global Clutch Applications Information Required Core Dia. = 8 inches Roll Dia. = 24 inches Tension = 20 lb Velocity = 150 fpm How to Size Torque = Tension x Radius = 20(12/12) = 20 lb-ft Velocity Motor rpm = π(Core = Dia.) Min. clutch rpm = 150 π(24/12) 150 π(8/12) = 72 rpm = 24 rpm Slipwatts = Torque x7 Slip rpm = 20(72-24) = 137 watts 7 Use a GCC Clutch Information Required Motor = 3 hp 1750 rpm How to Size Torque = hp(5250) = 3(5250) = 9 lb-ft rpm 1750 Use a GCB Clutch Magnetic Particle Clutches & Brakes Information Required Motor = 2 hp 1800 rpm How to Size Torque = hp(5250) = 2(5250) = 5.8 lb-ft rpm 1800 Use a GCB Clutch Information Required Tension = 40 lb Motor = 120 rpm Clutch continually energized How to Size Torque = Tension x Radius = 40(6/12) = 20 lb-ft x rpm = 20(120) = 343 watts Slipwatts = Torque 7 7 But clutch is only slipping half the time Slipwatts = 343 = 172 watts 2 Use a GCC Clutch Magnetic Particle Clutches & Brakes 111