SGK Helical Bevel Gearmotors

SGK  Series

Superior Gearbox SGK-Series helical-bevel gearmotors contain high

torque density with the highest efficiency available in a right-angle

design. Instead of losing energy via the sliding friction of a worm

gear, the K-series uses much lower rolling friction of helical and

bevel gears. The result is minimum heat and maximum energy

savings to the end user.


Product Range

  • Power ratings from 0.05 to 615 HP
  • Ratios from 3.98:1 to 24,353:1
  • Output torques to 442,500 lb-in.


  • Efficiency = 95.5%
  • Gears manufactured from certified steel, heat treated to a case hardness of 58-62 Rockwell C
  • Finished ground or shaved gear teeth to assure minimum noise, minimum heat, and maximum mechanical efficiency
  • Anti-friction bearings for optimum load capacity and long life
  • Captured keys on input and output shafts
  • Gear housing contains high strength cast iron, SAE Class 30 or equivalent (GG20)
  • O-ring on flange to prevent oil leakage when mounted on a surface that is not totally flat
  • High cross-section modulus design, rugged monobloc design for maximum rigidity
  • Center tapped holes on output shafts to aid the installation of shaft components
  • Metric or Inch dimension output shafts
  • Removable inspection cover
  • Shock capacity meets or exceeds AGMA 6009-A00



  • Inverter duty
  • Connection terminals
  • Low rotor inertia for high cycling and tight control
  • EISA (IE3) “Premium” available
  • 50Hz, 60Hz, or 50/60Hz global motor
  • for shipment into Europe


  • Torque arm for shaft mounting
  • B14 or B5 flange with centering tenon
  • Can be ordered for any mounting orientation

Optional Features

  • C-Face or IEC motor adapter
  • Torque arm that attaches to bottom of gear unit
  • Heavy duty taper roller bearings (67-127)
  • FKM seals instead of NBR
  • Corrosion and/or long term storage protection
  • High cycling fail-safe brake
  • Forced cooling fan for low frequency operation
  • Thermostat or thermistor protection
  • Plug connectors for quick motor replacement
  • Two-speed motor
  • Motor encoder – built-in or externally mounted
  • CSA hazardous location and ATEX rated motors

Contact us at Superior Gearbox for sizing/ratings/drawings for our helical bevel gearmotors.