SKF - Rolling Bearings

8 Spherical roller bearings
Mounting
Due to the design of spherical roller bearings,
the rings and roller complement may be displaced
axially from the normal position during
handling. Therefore, SKF recommends
mounting spherical roller bearings when the
shaft or housing is in the horizontal position.
Also, whenever possible, rotate the inner or
outer ring to align the rollers during mounting.
If spherical roller bearings are mounted
when the shaft or housing is in the vertical
position, the roller complement, together with
the inner or outer ring will move downward
until there is no more clearance. Then, when
the bearing rings expand or contract as a
result of an interference fit, a preload is likely
to result. To prevent this preload condition
from occurring, rotate the inner or outer ring
during installation. If 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 always
mounted with an interference fit. To obtain
the proper degree of interference, one of the
following methods can be used:
1 measuring the clearance reduction
2 measuring the lock nut tightening angle
3 measuring the axial drive-up
4 applying the SKF Drive-up Method
5 measuring the inner ring expansion
(Sensor Mount)
For additional information about these
mounting methods, refer to Mounting, dismounting
and bearing care († page 271), or
the SKF bearing maintenance handbook.
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. Additional information
is available online at skf.com/drive-up.
Recommended values to apply methods 1 to
3 are listed in table 7.
900