This is a simple, but very powerful stepper motor with a 4-wire cable attached. This is a [Bipolar](http://en.wikipedia.org/wiki/Bipolar_electric_motor) Motor. **Features:** * Step Angle (degrees) :1.8 * 2 Phase * Rated Voltage : 12V * Rated Current : 0.33A * Holding Torque : 2.3kg*cm * 5mm Diameter Drive Shaft * Winding resistance: 32.6 Ω * Winding inductance: 48 mH * Max flux linkage: 1.8 Vs * Maximum Detent Torque: 0.016 N.M * Total inertia (kg.m.m): 3.5 Kg.m.m * Total friction (kg.m/s): 4 Kg.m/s * NEMA 17 Mounting Hole Pattern (31mm) * Motor Width: 42mm (1.67”) **Documents:** * [Datasheet](http://www.sparkfun.com/datasheets/Robotics/SM-42BYG011-25.pdf) * [Motors and Selecting the Right One](https://learn.sparkfun.com/tutorials/motors-and-selecting-the-right-one#stepper-motors---simply-precise) * [Hookup Guide](https://learn.sparkfun.com/tutorials/easy-driver-hook-up-guide) **Videos**
