The SH2861-4011P by Sanyo Denki is a two-phase, bipolar, stepper motor rated at 3.3 Nm, with a voltage range of 100VAC. It features two copper windings, with each winding capable of 2A current. The step angle of the motor is 1.8 degrees, and it is a size 28 (approx. 2847 sq. mm). The shaft is a 4mm diameter with a 1mm keyway. It is a high-torque motor with a wide variety of applications, ranging from applications requiring very precise motion control, such as robotics, to applications in industrial automation and medical instruments.