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Maximum torque capacity with largest hollow shaft

The SHA Series AC Servo Actuators provide high torque and highly accurate rotary operation. These AC Servo Actuators are each composed of Harmonic Drive® speed reducers for precision control and a super flat AC servo motor. There are three types of speed reducers available.

  • SG type with SHG Series incorporated

  • HP type with HPF Series incorporated

  • CF type with CSG Series incorporated

The SHA Series features an unmatched compact hollow body. Entire machine and equipment structures can be simplified by passing wires, pipes and laser beams through a hole in the center of the actuator. Additionally, output shaft bearing, speed reducer, motor winding and others can be selected. The SHA Series features wider variation that can meet various needs.

Kundennutzen und Merkmale

Optimised for your applications

  • Reduced material use
  • Higher product quality
  • Less waste
  • Consistent quality
  • High availability
  • Reduced maintenance costs
  • Optimal design solution
  • Increased operating reliability
  • Easy load connection


  • Hollow shaft diameter up to 65 mm
  • Compact design
  • Torque to volume ratio more than 5 times that of a direct drive motor
  • Output torque from 26 Nm up to 3419 Nm
  • Output bearing, speed reducer and motor winding specification can be selected to meet various needs
  • 17 bit magnetic absolute encoder with Nikon A-format protocol
  • By combining with hollow shaft planetary reducer “Harmonic Planetary®” HPF Series, high-speed revolution is available
  • High accuracy SHA-CG type is added to the product lineup

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