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Mounting bearings with a tapered bore

Bearings with a tapered bore are always mounted with an interference fit. To obtain the proper degree of interference, one of the following methods can be used:
  1. feeling the clearance reduction by swivelling the outer ring
  2. measuring the lock nut tightening angle
  3. measuring the axial drive-up
  4. applying the SKF Drive-up Method
For additional information about these mounting methods, refer to Mounting, dismounting and bearing care, or the SKF bearing maintenance handbook.
The most suitable method for bearings mounted on shafts with a diameter ≥ 50 mm is the SKF Drive-up Method, which is a fast, reliable and safe method to achieve the appropriate interference fit. For additional information, refer to SKF Drive-up Method Program.
Recommended values to apply methods 2 and 3 are listed in table 1.

Feeling the clearance reduction by swivelling the outer ring

When mounting self-aligning ball bearings with Normal radial clearance, it is generally sufficient to check clearance reduction during axial drive-up by turning and swivelling the outer ring (fig. 1). The clearance reduction in the bearing is sufficient when the outer ring can be turned easily, but a slight resistance is felt when it is swivelled out.
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