OMT Orbital Motor

OMT orbital hydraulic motors use a gerotor mechanism to convert hydraulic energy into low-speed, high-torque rotation. Inside the motor, the stator and rotor form several sealed chambers with continuously changing volumes. When pressurized oil enters these chambers, the pressure difference causes the rotor to move relative to the stator in an orbital path, and this motion is transferred to the output shaft.

In this type of motor, the stator–rotor set largely determines the working performance. The contact condition between the two parts affects leakage, starting behavior, and torque stability. Profile accuracy and surface finish of the stator and rotor therefore have a direct influence on motor efficiency and service life.

The clearance between the stator and rotor is also an important parameter. It is not defined by a single value. Different motor designs and performance requirements require different matching clearances. For example, requirements for starting torque, pressure level, or leakage control may lead to different clearance standards between the stator and rotor.

Producing these components requires stable machining accuracy and consistent profile control. With dedicated processing equipment and experience in manufacturing stator–rotor sets, the matching profiles and clearances can be controlled according to the technical requirements of different OMT motors. This helps ensure stable operation and consistent performance in practical applications.

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