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Sumitomo's Cyclo Helical Buddybox (Cyclo HBB) combines the long-proven Cyclo reducer and a single stage offset parallel helical gearbox in a rugged integral, shaft-mounted design. The HBB incorporates the strength and flexibility of the Cyclo reducer with the adaptability of a shaft-mounted, reducer. With a 24-month warranty, regardless of hours of operation, the Cyclo HBB is an excellent choice for applications in material handling, shredders, specialty machine industries, conveyors, and other applications requiring a simple, convenient shaft mount reducer.
Ratios: 11:1 up to 26,000:1 and greater
Torque Capacity: Up to 71,600 in. lbs.
HP: 1/8 to 30
Mounting: Hollow Shaft, Foot, Flange, Face
Options: Integral Motor, C-Face
Motor Standards: NEMA, IEC, JIS, UL, CSA, CE


  • Cycloidal input and oversized helical gearing provides high overload capability and exceptional reliability for long life.
  • Available as C-Face or gear motor input.
  • No belts, sheaves, guards, or keyways.
  • New CEMA flange option for screw conveyors.
  • High performance steel gearing components provide 85-90% efficiency across all ratios.
  • Steel Taper-Grip keyless shaft bushing allows for easy, cost-effective mounting and removal of hollow shaft units.
  • Double output seals prevent leaks, maintain optimum lubrication and prevent harmful infiltration of contaminants.


  • Material Handling
  • Conveyors
  • Shredders
  • Belt Filter Press
  • Mixer/Blender Food Processing
  • Rolling Mill Table
  • Screw Conveyors
  • Elevators
  • Hoist Drives
  • Climber Screens


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