The shaft is an important part of the motor. It is the link between the motor and the equipment for electromechanical energy conversion. It supports the rotating parts, transmits torque, and determines the relative position of the rotating parts and the stator. Therefore, the motor shaft must have reliable strength and stiffness to ensure the realization of the preset design functions. The following ms parameters briefly describe various types of motor shafts and their characteristics, providing a reference for the selection and design of motor shafts.