The 1JMD-63 external five-star hydraulic motor is a radial crankshaft connecting rod type hydraulic motor with a compensatable end face oil distribution structure. It is a low-speed, high-torque hydraulic motor widely used in hydraulic transmission systems of machinery in petroleum, chemical, mining, marine, construction, and other industries. It is particularly suitable for driving screws in injection molding machines, as well as in transmission mechanisms such as winches, drums, various rotary mechanisms, and the driving of crawler and wheel travel mechanisms.