Hydrostatic motor operation is based on changing volume of the displacement chambers, which are formed in its interior. Formation of the displacement chambers varies from one type of hydrostatic motor to another. In the discussed vane motor, chambers are formed between the stator, rotor and vanes. Due to the pressure differential on opposite sides of the vane, a net force is generated, which causes rotation of the motor shaft. Vane motors are known for having a relatively low efficiency ratio but also for being very robust and able to output a lot of power. In many industries, hydraulic cranes are used for lifting and carrying heavy loads. Depending on the application, there is often need for rotation of the carried load. For that purpose, a high torque, low speed vane motor was designed. The work is design-oriented with emphasis on the calculation of bolted joints, which are crucial for correct motor operation. Two concepts of the motor were designed, from which the one with higher torque and better axial loading characteristics was chosen. According to calculations, all of the critical elements are able to withstand highest loads during motor operation. Although uniform rotation of the motor shaft was achieved, it was discovered during testing, that the motor does not output expected torque.
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