Sumitomo’s Helical Buddybox - HBB speed reducers and gearmotors provide innovative shaft-mounted drive solutions for demanding applications. The HBB combines the quiet, efficient and reliable performance of the Cyclo Drive input with the rugged helical-gear output. The modular design provides a compact, efficient product and the most flexible range of output speed and torque combinations available.
Helical Buddybox - HBB
Helical gearboxes and gearmotors with Cyclo Drive reducer input. Features keyless, Steel Taper-Grip bushing for easy installation.
Offset parallel, helical gearbox in a rugged integral, shaft-mounted design.
- Integrated Cyclo Drive technology
- Keyless Taper-Grip Bushing or Keyed Hollow Bore
Input | Integral Gearmotor, free Input Shaft or Motor Adaptor |
Output | Taper-Grip Bushing, Keyed Hollow Bore |
Ratios | 21:1 up to 2 559:1 and greater |
Torque | Up to 8 565 Nm |
Power Range | 0.12 to 30 kW |
Mounting | Hollow Shaft, Flange, Clamp |
Options | Integral Motor, Motor Adaptors |
Motor Standards | Global Standards |
Helical Buddybox - HBB

Key Facts
Modular Design
Interchangeable cast-iron housings in flange, face or shaft-mount configurations.
Cyclo Drive Technology
Quiet, efficient and reliable operation with high-torque density and compact size.
Taper-Grip Bushing
Provides quick, easy mounting and removal of the unit without the need for a custom shaft.
No Thermal Limitations
Highly-efficient design never needs an external fan.
Rugged Monoblock Housing
Monoblock-housing design eliminates the possibility of leaks at housing split.
Double-Output Seals
Prevent lubricant leaks and protect from contamination.
Mounting Versatility
Flange, Face, and Shaft Mounting options allow for universal mounting.
Long Life Bearings
Oversized, heavy-duty bearings for maximum strength and service life.

CAD / Configure
Select your level of product detail:
Learn more about our CONFIGURATOR TOOL:

Looking for a different product?
Click on our Product Selector to quickly find the right product from our entire lineup.
Our intuitive filters help you find the product that best suits your application.