Page 84 - SKF-bearing-housings

Split plummer block housings SNL 2, 3, 5 and 6 series

Relubrication via the outer ring Relubrication from the side for housings
The hole in the centre of the cap should be with V-ring seals
used to relubricate spherical roller bearings When relubricating bearings from the side in
with a relubrication feature (a lubrication housings with V-ring seals, mount an add-
groove and holes in the outer ring) († fig. 12). itional V-ring inside the housing on the side
When applying grease via the relubrication where grease is applied († fig. 14). This forces
feature, the shaft should be rotating. Narrow the grease to travel through the bearing and
bearings (dimension series 13 and 22) in the exit the housing on the opposite side.
locating position can be displaced axially, so SKF can supply an appropriate V-ring
that the relubrication groove in the bearing together with a splash plate that fits in the seal
does not line up with the relubrication hole groove to cover a bit more than the top half of
in the housing cap. Make sure the bearing is the housing. These sets are identified by the
sufficiently centred when relubricating. series designation ASNA followed by the hous-
ing size identification and the suffix V, e.g.
Relubrication from the side ASNA 516 V.
When relubricating from the side, which is
typically necessary for self-aligning ball bear- Grease escape hole
ings and CARB toroidal roller bearings, the When four-lip seals (TSN .. L) or felt seals
offset hole in the housing should be used. An (TSN .. C or FS 170) are used, grease cannot
integrated flange in the housing guides grease escape via the seals. If relubrication is required,
from the grease fitting directly to the rolling the housing should have a grease escape hole.
elements († fig. 13). This grease guiding SNL housings can be supplied with a grease
system is available on housings from sizes 216 escape hole (suffix V). A grease escape hole can
and 516-613 upwards. be drilled into the housing using the dimen-
When bearings mounted on an adapter sions provided in table 12.
sleeve have to be relubricated from the side,
the grease should be introduced from the side
opposite the lock nut.
When bearings mounted at the end of a
shaft have to be relubricated from the side, the
grease should be applied at the point closest to
the end cover.

Fig. 12 Fig. 13
Relubrication via the outer ring Relubrication from the side

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