The SH1422-5041 with Stepper Motors 2-Phase Step Motor, Single Shaft, 42mm, 1.8 Degree/Step, Bipolar, Leads, 0.34 Nm is a motor manufactured by Sanyo Denki. It is a 2-phase step motor, meaning that it rotates in measurable increments, known as "steps," when an electrical current is applied. This particular model is 42mm in size with a 1.8 degree step angle and a rated holding torque of 0.34 Nm, making it suitable for use in applications where accuracy and precision are of the utmost importance. It has four leads and requires a bipolar electrical current to operate. It is suitable for use in a wide variety of applications, including industrial automation, medical devices, and robots.