Pacific Scientific Servo Motor With Tacho Type = 55NM81-020-5-CTRL 406320-10 R - A Volt rated = 24 V Amp. rated = 12.2 A ( rms ) P2 = Rotor Inertia = 0.01 OZ.IN.Sec. 2 Hmax = Treminal Resis. = 0.65 Ohms Torque Constant = 18.8 OZ.IN /Amp Analog Tachometer Voltage Constant = 3 V / Krpm-1 Rotor Inertia = Included with motor inertia Terminal Resist. = 75 Ohms ( AVG).