This bipolar Nema 23 stepper motor with 1.8 deg. step angle (200 steps/revolution). <br>Each phase draws 2.8A, allowing for a holding torque of 1.26Nm(178.5oz.in). <br> <br> <b>Electrical Specification:</b> <br> <br> * Manufacturer Part Number: 23HS22-2804S <br>* Motor Type: Bipolar Stepper <br>* Step Angle: 1.8 deg. <br>* Holding Torque: 1.26Nm(178.5oz.in) <br>* Rated Current/phase: 2.8A <br>* Phase Resistance: 0.9ohms <br>* Inductance: 2.5mH+/-20%(1KHz) <br> <br> <b>Physical Specification:</b> <br> <br> * Frame Size: 57 x 57mm <br>* Body Length: 56mm <br>* Shaft Diameter: 6.35mm <br>* Shaft Length: 20.6mm <br>* Number of Leads: 4 <br>* Lead Length: 300mm <br>* Weight: 700g <br> <br> <b>Connection:</b> <br> <br> Black(A+), Green(A-), Red(B+), Blue(B-) <br> <br> <b>Warning:</b> <br> <br> Make sure the motor connect to a constant current or chopper drive controller before you test motor. <br>Connecting the motor directly to a power supply will destroy the motor.