A hydraulic motor is an actuator in a hydraulic system that converts the pressure energy of a hydraulic pump into the mechanical energy (torque and speed) of its output shaft. The fluid is the medium for transmitting force and motion.
Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, construction machinery, mining machinery, metallurgical machinery, marine machinery, petrochemicals, and port machinery.
High-speed gear motors have advantages such as small size, light weight, simple structure, good manufacturability, insensitivity to oil contamination, shock resistance, and low inertia. Disadvantages include larger torque pulsation, lower efficiency, lower starting torque (only 60%-70% of the rated torque), and poor low-speed stability.

