SKF - Rolling Bearings

Mounting
Mounting
Depending on the bearing type and size,
mechanical, thermal or hydraulic methods are
used for mounting. In the following, the bearing
size is categorized:
• small
• medium-size
• large
† d ≤ 80 mm
† 80 mm < d < 200 mm
† d ≥ 200 mm
In all cases, it is important that the bearing
rings, cages and rolling elements or seals are
never struck directly with any hard object and
that the mounting force is never applied
through the rolling elements.
For an interference fit, the mating surfaces
should be coated with a thin layer of light oil.
For a loose fit, the mating surfaces should be
coated with SKF anti-fretting agent.
(† fig. 6) instead of a sleeve enables the
mounting force to be applied centrally.
Large numbers of bearings are generally
mounted with a press.
If a bearing has to be pressed onto the shaft
and into the housing bore at the same time,
the mounting force must be applied equally to
both rings and the abutment surfaces of the
mounting tool must lie in the same plane.
Whenever possible, mounting should be done
with an SKF bearing fitting tool († fig. 5).
Mounting bearings with a cylindrical
bore
With non-separable bearings, the ring that is
to have the tighter fit is usually mounted first.
Cold mounting
If the fit is not too tight, small bearings can be
driven into position by applying light hammer
blows to a sleeve placed against the bearing
ring side face. The blows should be evenly distributed
around the ring to prevent the bearing
from tilting or skewing. The use of a bearing
fitting tool († fig. 5) or a mounting dolly
Fig. 5 Fig. 6
H
275