Very High TorqueNEMA 17 bipolar 165 inch x165 inch x236 inch 4-wireThis is one of strongest bipolar Nema 17 stepper motor with 18 deg. step angle (200 steps/revolution).Each phase draws 21A, allowing for a holding torque up to 65Ncm(92ozin).Electrical Specification:Motor Type: Bipolar StepperStep Angle: 18 deg.Holding Torque: 65Ncm(92ozin)Rated Current/phase: 21APhase : 16ohmsInductance: 3mH+/-20%(1KHz)Physical Specification:Frame Size: 42 x 42mmBody Length: 60mmShaft Diameter: 5mmShaft Length: 24mmD-cut Length: 15mmNumber of Leads: 4Lead Length: 500mmWeight: 500gColour: Blackmaterial: metalConnection:Black(A+), Green(A-), Red(B+), Blue(B-)Warning:Make the motor connect to a constant current or chopper drive controller before you test motor.Connecting the motor directly to a supply will destroy the motor.Package Contents:1 * MOTOROnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.