The Sumitomo Cyclo HBB Series (Helical Buddybox®) is a high-performance parallel shaft helical gearbox that combines Sumitomo’s renowned Cyclo® input technology with a rugged helical gear output stage. Designed for demanding industrial applications, the HBB series delivers exceptional shock load resistance, smooth operation, high torque density, and reliable long-term performance.

The Cyclo HBB is especially suited for conveyors, screw conveyors, bulk material handling, mining, food processing, and heavy-duty industrial machinery where durability and compact shaft-mounted designs are critical. Its modular construction and Taper-Grip® mounting system allow quick installation and simplified maintenance.

Key Features

• Parallel shaft helical gearbox with integrated Cyclo® reducer input
• High shock-load resistance and exceptional overload capacity
• Smooth, quiet, and low-vibration operation
• Compact shaft-mounted design for space-saving installations
• Taper-Grip® keyless bushing system for easy mounting and removal
• Rugged monoblock cast iron housing for maximum durability
• High efficiency up to approximately 93%
• No external cooling fan required under normal operation
• Double output seals for improved contamination protection
• Oversized heavy-duty bearings for long service life
• Hollow shaft, flange, and face mounting configurations available
• Compatible with NEMA, IEC, JIS, UL, CSA, and CE motor standards
• Available as gearmotors or speed reducers with motor adaptors