are devices that convert the energy of a pressurized working fluid into mechanical energy. They are a drive element widely used in many machines and hydraulic systems.

The distinguishing feature of the hydraulic satellite motors developed by SM Hydro and Stosowanie Maszyn is their internal construction and the possibility of feeding fluids with much lower viscosity and lubricity than mineral and synthetic oils.

The working mechanism of SMW-type hydraulic satellite motors uses a system of elements (envelope, planet , satellites) having gears with evolute shapes. The toothed parts moving during operation form pressure chambers sealed due to the occurring “rolling” of the elements. The satellites forming the working mechanism act, so to speak, as “distributors and sealers”, minimizing the occurrence of torsion and the associated internal pressure compensation. In addition to the working mechanism, the key design element of SMW hydraulic satellite motors are, controlling the flow of the feed fluid, gearing plates made of sintered carbide, significantly increasing the life and trouble-free operation of the motor.

Detailed characteristics and description of the working mechanism of SMW hydraulic satellite motor are available here