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9 INTERNAL SELF-ALIGNING BALL & ROLLER BEARING UNITS

5. Handling bearings

Dismounting Bearings

Prior to dismounting a bearing which is to be re-used,
careful consideration should be given to the shaft and
housing fits, i.e. which is “tight” and which is “loose”. In
most applications the inner ring is an interference fit on
the shaft and the outer ring is a clearance fit in the
housing, in which case it is normal practice to first
remove the housing from the bearing outer ring and then
to remove the bearing from the shaft. When this opera-
tion is performed, pressure must be applied only directly
Clamping jig
to the inner ring, (or whichever is the “tight” fit). This will Fig. 2
prevent brinnelling of the raceways which will occur if
pressure or impact is applied to the “tight” ring from the
Hydraulic dismounting methods
“loose” ring via the rolling elements.
Figure 2 shows the technique for removing a bearing
from a tapered adapter sleeve by the use of a clamping
jig which holds the bearing in position whilst allowing
sufficient axial movement of the sleeve to free the
bearing from the taper. Alternatively, if there is sufficient
access space the bearing can be knocked down the
taper by a hammer and drift. A withdrawal sleeve can
sometimes be used more conveniently than an adapter
sleeve. In all cases the eventual removal of the bearing
should be considered at the time of designing the
Fig. 3 Fig. 4
bearing arrangement. Various jigs and pullers are
available to suit most dismounting problems. Consult
CBC re-availability.

CBC Hydraulic hand pump and connections

Hydraulic adapter sleeves
H_ _ _ _H series
Flexible hose assembly
Male connector Male connector
CBC No. 3-1630 CBC No. 3-1622 CBC No. 3-1629

1/4Ó N.P.T. 1/8Ó B.S.P.T.
1/4Ó B.S.P.T.

Hydraulic hand pump
CBC No. 3-1621 Steel pipe assembly
1/4Ó N.P.T. CBC No. 3-1623
M6 x 0.75
Male connector
CBC No. 3-1624
Hydraulic nut series

Hydraulic adapter sleeves
H_ _ _ _OH series

For specialist data on CBC hydraulic equipment, and information
concerning oil injection methods contact CBC Technical Department.
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