Freewheel bearing (BB)
The BB series comprises sprag-based freewheel clutches with protective covers that have bearing characteristics and dimensions corresponding to the ball bearings of the 62 series. They are available as a press fit, either with a single groove in the inner ring (1K) or with grooves in the inner and outer ring (2K). Matching feather keys for both variants are also available.
Compact BB Freewheel Clutches with 62-Series Bearing Dimensions
The BB series freewheel clutches combine sprag-based one-way functionality with the compact dimensions of standard 62-series ball bearings. This makes them ideal for drop-in installation in existing housings without design modifications.
1K and 2K Variants for Secure Keyed Connections
BB freewheels are available with a single keyway in the inner ring (1K) or with keyways in both the inner and outer ring (2K). Both versions ensure safe, backlash-free torque transmission via DIN-standard feather keys.
Shaft Sizes from 12 to 40 mm for Versatile Use
With shaft diameter options of 12, 15, 17, 20, 25, 30, 35 and 40 mm, the BB series covers a wide range of machine sizes and applications – from lightweight automation systems to mid-range industrial drives.
Torque Capacity from 1 to 300 Nm for Dynamic Applications
The BB series offers rated torque ranges from 1–150 Nm and 151–300 Nm. These torque classes suit both precision control systems and higher-load mechanical assemblies in material handling, packaging, and automation.
Available with or without Integrated Bearings
Depending on the installation setup, BB freewheels are available in bearing-supported or non-bearing designs. Bearing-supported versions offer added stability and simplified installation, while non-bearing types are more compact.
Protective Covers for Reliable, Contamination-Free Operation
All BB series freewheels come with protective covers to shield the internal sprag system from dust and debris. This feature ensures long-term reliability, even in environments with particles or splash exposure.
Optional Centrifugal Lift-Off for Reduced Drag in Idle Mode
BB freewheels are optionally available with centrifugal lift-off, disengaging the clutch mechanism at higher speeds. This reduces internal drag and wear in idle or overrunning conditions, extending service life.
Maintenance-Free Design with Pre-Greased Filling
Each BB freewheel is factory-filled with long-life grease, eliminating the need for relubrication during operation. The maintenance-free design improves system uptime and reduces service intervals significantly.