During handling, the rings and roller complement of CARB toroidal roller bearings may be axially displaced from their normal position. This is especially likely where CARB bearings are mounted with the shaft or housing in the vertical position:
- The roller complement, together with the inner or outer ring, will move downward and result in no more clearance.
- When the bearing rings expand or contract as a result of an interference fit, preload is likely to result.
Therefore, wherever possible:
- Mount CARB bearings with the shaft or housing in the horizontal position.
Rotate the inner or outer ring to align the rollers during mounting.
Where this is not feasible, use a bearing handling tool or other device to keep the bearing components arranged centrally.
Mounting bearings with a tapered bore
Bearings with a tapered bore are mounted with an interference fit, by using one of the following methods:
- Measuring the clearance reduction (table 1)
- Measuring the lock nut tightening angle (table 1)
Measuring the axial drive-up (table 1)
Applying the SKF Drive-up Method (→ SKF Drive-up Method Program)
For bearings with d > 100 mm, SKF recommends using the SKF Drive-up Method. This is a fast, reliable and safe method to achieve the appropriate interference fit.
- Measuring the inner ring expansion (→ SensorMount)
For additional information about these mounting methods, refer to Mounting bearings with a tapered bore, or the SKF bearing maintenance handbook.