Number of Poles:8 Number of Phases:3 Nominal Voltage:48 VDC Rated speed:3000 RPM Continuous Torque :1.4 N-m Output Power :440 Watts Peak Torque1 :4.2 N-m Peak Current :38.0 Amps Line to line Resistance :0.47 Ohms Line to line Inductance :0.71 mH Torque constant :0.115 N-m/Amps Back EMF :12.0 V/kRPM Rotor inertia :1250 g•cm2 Body Length (L) :94 mm Mass :2.75 kg