Page 178 - SKF-bearing-housings

Split plummer block housings SNLN 30 series

Relubrication grease from the grease fitting directly to
SNLN 30 plummer block housings enable the rolling elements († fig. 13).
relubrication of the incorporated bearings and When bearings mounted on an adapter
seals († fig. 11): sleeve have to be relubricated from the side,
the grease should be introduced from the side
• SNLN 30 housings have two holes that have opposite the lock nut.
been drilled and tapped for an AH 1/8-27 PTF When bearings mounted at the end of a
grease fitting. On a new housing, the holes shaft have to be relubricated from the side,
are covered by plastic plugs. These plugs the grease should be applied at the point
should be replaced with the grease fitting closest to the end cover.
and threaded plug supplied with the
housing.
• If a larger grease fitting or other equipment
has to be used, an adapter to change to a
G 1/4 thread is available († page 48).
• Dimples cast into the top of the housing cap
indicate alternative positions where holes
can be drilled and tapped to accommodate
a grease fitting for bearing or seal
relubrication.
Relubrication via the outer ring
The hole in the centre of the cap should be
used to relubricate spherical roller bearings
with a relubrication feature (a lubrication
groove and holes in the outer ring) († fig. 12).
When applying grease via the relubrication
feature, the shaft should be rotating.
Relubrication from the side
When relubricating from the side, which is
typically necessary for CARB toroidal roller
bearings, the offset hole in the housing should
be used. SNLN 30 housings from size 3024 to
3038 have an integral flange that guides
Fig. 12 Fig. 13
Relubrication via the outer ring Relubrication from the side

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