<p> This is high torque Nema 17 stepper motor with 1.8 deg. step angle (200 steps/revolution). Each phase draws 2A, allowing for a holding torque of 45Ncm(63.7oz.in). <br> It's ideal for the RepRap Prusa, Mendel 90, Rostock and similar 3D printers, as well as CNC and robotics applications. <br> The motor is supplied with a 1 metre long power cable with a 4-pin Harwin female connector already fitted - ready to plug and print!<br><br> 100% brand new of "<b>STEPPERONLINE</b>", and ROHS and CE certificated. <br> <br> <br> <b>Electrical Specification:</b><br> <br> * Manufacturer Part Number: 17HS16-2004S<br> * Motor Type: Bipolar Stepper<br> * Step Angle: 1.8 deg. <br> * Holding Torque: 45Ncm(63.7oz.in)<br> * Rated Current/phase: 2A<br> * Phase Resistance: 1.1ohms<br> * Inductance: 2.6mH+/-20%(1KHz) <br> <br> <b>Physical Specification:</b><br> <br> * Frame Size: 42 x 42mm<br> * Body Length: 40mm<br> * Shaft Diameter: 5mm<br> * Shaft Length: 23mm<br> * D-cut Length: 21mm<br> * Number of Leads: 4<br> * Lead Length: 1000mm<br> * Weight: 310g <br> <br> <b>Connection:</b><br> <br> Black(A+), Green(A-), Red(B+), Blue(B-) <br> <br> <b>Warning:</b><br> <br> * As a stepper motor, it should connect to a constant current or chopper driver. Connecting the motor directly to a power supply will destroy the motor. <br> * To choose a driver, please make sure the driver's output current not higher than motor rated current, and voltage not higher than 36V.<br> * Please take care of four wires coils order when you connecting to driver, or it will damage your driver. <br> </p>