Cyclo bevel buddybox 5 with quill adapter
Cyclo bevel buddybox 5 with quill adapter

Cyclo® Bevel Buddybox® 5 Series Reducer

Right-Angle Spiral-Bevel Speed Reducers with Cyclo® or Planetary Reducer Inputs

Robust, state-of-the-art, spiral-bevel reducers, designed for keyed hollow-bore installations.

  • All-Steel Internal Components
  • Cost effective for keyed hollow-bore installations
  • Highly Efficient
  • Integrated Cycloidal Technology
  • Maintenance-Free Options Available
Input Quill and C-face adapter
Output Shrink Disc, Keyed Hollow Bore
Mounting Hollow Shaft, Flange, U-Face (direct surface mount)
Sizes 4 frame sizes (Z-C), 25 to 412kg
Ratios 11:1 to 26,492:1 and greater
Power Ranges 1/8 to 60HP (0.10kW to 45kW)
Torque Capacity 45,492 lb-in (5,140 N·m)

Cyclo® BBB5

The Cyclo® BBB5 combines the strength and flexibility of the Cyclo® gear reducer and a single-stage right-angle spiral-bevel gearbox in a simple right-angle gearbox design. With a 24-month warranty, regardless of hours of operation, the Cyclo® BBB5 is an excellent choice for applications in material handling, packaging, conveyors, and other applications requiring right-angle speed reducers.

BBB5 Gearmotor

Key Facts

Max Bore Size
Torque Capacity
Max Rating

Features of the Cyclo® BBB5 Series

Compact Housing Design

The Cyclo® BBB5 features a smooth, cast-iron housing design, and is optimized for shaft-mount applications, long life and easy maintenance.

No Thermal Limitations

The Cyclo® BBB5 series runs cooler and lasts longer than typical right-angle shaft gearmotors.

High Efficiency

The Cyclo® BBB5 utilizes high performance steel spiral-bevel gearing that delivers up to 94% efficiency.

Lightweight Design

The Z Size features a small, light-weight aluminum die-cast housing, making it the ideal upgrade from typical worm-gear drives.

100% Hardened Steel Internal Components

Provide long life, smooth operation and superior strength.

High Torque Splined Connection

Ensures more durable and dependable power transmission than typical keyed connections.

Tapered Bearings

Resist axial and radial loads simultaneously.

Cyclo® or Planetary Input

Cyclo® technology provides high overload capacity and exceptional reliability.

Shaft Mount Design

Designed specifically for applications that require shaft-mounted reducers. Save space, reduce cost, and increase safety.


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Do you have questions about the Cyclo® BBB5? Below are some of our most commonly asked questions, or you can view our Support area under Knowledge for more frequently asked questions and answers.

The standard ratings for Cyclo® BBB5 are based on 10-hour daily service under conditions of uniform loads (equivalent to AGMA service factor 1.0). By following the product selection process outlined in our catalog, you will determine and apply the Service Factors to compensate for the severe operating conditions.  Sumitomo recommend our Cyclo® BBB4 product for extremely severe operating conditions, as it is a more robust right-angle gearbox design.

Cyclo® BBB5 Speed Reducers provide 300% momentary intermittent shock load capacity. For applications with shock loads greater than 300%, consult a Sumitomo Application Engineer.

Emergency After-Hours Support


Sumitomo’s Product Support offers scheduled repair services as a one-stop-shop for all your related gearbox needs. For emergency repairs, we offer repair services 24 hours a day, 7 days a week.

Cyclo and Spur Gear

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