SNL plummer block housings solve the housing problems

1 Product information 2 Recommendations 3 Product data
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Page ............. 3 Axial displacement Page ............. 46
Axial displacement
using CARB bearings
in SNL housings
The permissible axial displacement in
a CARB bearing is dependent on the
clearance remaining in the bearing
after mounting: the larger the residual
radial internal clearance, the larger the
permissible axial displacement of one
ring with respect to the other. This axial
displacement reduces the clearance in
the bearing until at a given displacement,
the clearance disappears altogether
or the rollers may start to be
exposed at one side of the bearing.
Table 6 shows the maximum permissible
axial displacement for each
CARB bearing having Normal initial
radial internal clearance when mounted
normally. It is assumed that there is
little difference in temperature between
inner and outer ring.
When the rings are displaced a
certain distance, the roller and cage
assembly will move through half this
distance. If the inner ring moves into
the bearing, or alternatively, if the outer
ring moves out from the bearing the
roller and cage assembly can contact
the lock nut and locking washer. For
bearings of series C 22 K up to and
including size 22, therefore, a special
adapter sleeve with a narrow slot and
a self-locking KMFE nut must be used
to prevent this happening (➔ fig 10 ).
Such sleeves are supplied by SKF and
identified by suffix E, e.g. H 311 E.
For bearings of series C 22 K and
C 32 K, from size 24 and above, the
adapter sleeves are supplied together
with a KML nut, indicated by suffix L
in the sleeve designation, e.g. H 2324 L.
It should be observed that the possible
axial displacement of the shaft
relative to the housing may be limited
by the type of seal used.
CARB bearing on adapter sleeve
Fig 10
24
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