A new line of gear motors launched by the Drives & Motion Division of Yaskawa America, Inc. is based on its Sigma-7 servo motors. The series brings precise Yaskawa servo motion to a wider variety of automation applications, especially to uses that require high torque at low output speeds.S7G Gear Motors provide rapid, responsive motion output for larger loads. Image credit: Yaskawa AmericaS7G Gear Motors provide rapid, responsive motion output for larger loads. Image credit: Yaskawa America

A new set of gearheads have been designed to pair precisely with every servo motor in the full Sigma-7 range, creating complete gear motor solutions rated from a low of 50 W to as high as 15 kW. Five different gear ratios are available, ranging from 3/1 to 50/1.

The gear motors are intended as an alternative to bolting an aftermarket gearhead onto an existing servo motor. The gearheads are perfectly matched with their companion servo motors in mounting conventions, coupling mechanics and output characteristics. The mechanical design features:

  • Precision helical gearing with a 40 percent greater tooth surface area for notably smoother, quieter and more accurate operation
  • An enhanced system of bearings, including 45 percent larger planet bearings for guaranteed alignment, higher stiffness, greater load capacity and longer life
  • Balanced, concentric shaft couplings to minimize vibration during high-speed operation and reduce the inertia of the gear motor system
  • Documented performance, including 100 percent inspection of all gear motors and a report on noise level, vibration, backlash, accuracy and drive back torque
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