Home Products Stepper Motors NEMA17 Stepper Motor With T8 310mm One Start Lead Screw For 3D Printer/CNC (RMCS-1019) Stepper motor with T8 310mm One Start long leadscrew for 3D Printer and CNC. Specifications: Number of phase : 2 Insulation Class : Class B Rated voltage : 12v Rated Current : 1.5A Step Angle : 1.8 Phase Resistance(resistance per phase) :1.7ohm Phase Inductance(inductance per phase):10mH Holding Torque : 4.2 kgcm Rotor Inertia : 57 g.cm2 Lead Wire : 4 Lead Screw Type: Four Start Lead Screw Pitch: 2mm Motor weight: 0.28kg