Page 472 - SKF-bearing-housings

Split pillow blocks SDAF series including the extended range (inch dimensions)

Relubrication Fig. 7
All SDAF housings have one drilled and
tapped lubrication hole in the centre of the cap
(† fig. 7). The hole is plugged on delivery.
All housing bases are equipped with a drain
plug on each side to purge or drain old lubricant
or to serve as an outlet for circulating oil (†
fig. 8). The sump in the housing base is large
enough to accommodate a sufficient quantity
of lubricant to provide reliable long-term
operation.
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. 9).
When applying grease via the relubrication
feature, the shaft should be rotating. Fig. 8

Oil lubrication

Oil bath lubrication
The level of oil should be at about the centre of
the lowermost rolling element when the bear-
ing is stationary. For more information about
oil levels, contact the SKF application engi-
neering service. For higher speeds, the level
should be slightly lower to reduce the effects
of lubricant churning – about 1 /8 inch above
the corner of the outer ring raceway of the
bearing.
An oil sight glass should be used to monitor
the oil level during operation. It can be mounted
into one of the drain holes in the housing base.
The static oil level should be marked on the Fig. 9
sight glass prior to operation and a running
level should be marked after start up. Depend-
ing on the type of bearing and the speed and
direction of rotation, the running level will
either rise or fall from the static level.

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