The 4118M-01D-23RO is a stepper motor produced by Lin Engineering. This motor is a 1.8° precision hybrid stepper motor with a 1.8-degree step angle and 0.9° step angle accuracy, a length of 43.3 mm, and an end shaft diameter of 6.35 mm. It has a holding torque of 0.46 N-m at 5.2V, 1.2 A and 0.7N-m at 12V, 1.2A. The motor also has four wire connection coils, allowing for a "bi-polar" connection, meaning that it can be wired in a star, delta, or half-coil configuration. This motor is designed to meet higher accuracy requirements while operating at higher speeds, making it suitable for medical, imaging, printing, and other exacting applications.