Nema 23 Stepper Motor 2.83Nm 4A 8-wire 6.35mm Dual Shaft CNC Mill Lathe Router Medium Height/Torque Dual Shaft 2.83Nm(400oz.in) holding torque NEMA 23 bipolar 2.24"x2.24"x3.3" 8-wire 1.8 deg. step angle(200 steps/rev) Rated current 4.0A & resistance 0.4ohms