Adjust belt tension and compensate for shaft movement
A take-up Extreme Bearing unit is used to adjust belt or chain tension and to compensate for shaft movement. It allows the bearing position to be moved so that proper tension can be maintained as belts or chains naturally stretch and wear over time, while also helping to absorb and correct small shaft movements to keep the system running smoothly and reliably.
These Extreme Bearing units are generally applied in this way, but they can also be used in other configurations depending on the engineer’s professional judgment and the specific requirements of the application.
View the EXT unit in 3D
Typical reasons to use a take-up unit
- Easy tension adjustment. Common in conveyor systems — you can move the bearing position to tighten or loosen belts, chains, or conveyor rollers without redesigning the system.
- Compensates for wear and stretch. Chains and belts naturally elongate over time; a take-up unit lets you re-tension the system instead of replacing parts immediately.
- Maintains shaft alignment. The housing guides movement in a controlled direction, helping keep shafts aligned during adjustment.
- Reduces vibration and slippage. Proper tension improves efficiency and reduces belt slip, noise, and premature wear.
- Simplifies maintenance. Adjustment is usually done with screws or sliding frames, making servicing faster.
- Handles moderate misalignment. Many take-up units use self-aligning insert bearings, which tolerate small mounting inaccuracies.
Common applications
- Conveyor belts
- Bucket elevators
- Grain handling systems
- Mining equipment
- Fans and blowers
- Chain-driven machinery
Extreme Bearing take-up units installed in conveyor and processing machinery
Load directions for take-up units
Stainless steel 316 Extreme Bearing take-up units are designed for loads acting directly in line with the threaded spindle and away from the cover side. The guide slides must be properly supported by the surrounding structure to ensure correct load distribution and reliable operation.
Load direction for Extreme Bearing take-up units — in line with the threaded spindle, away from the cover side.