Page 370 - SKF-bearing-housings

Split plummer block housings SONL series

Fig. 14
Oil cooling tubes

Fig. 15 Circulating oil lubrication systems
Circulating oil lubrication system Circulating oil lubrication systems are gener-
ally preferred when high speeds generate an
excessive amount of heat, or when there are
high ambient temperatures. For this lubrica-
tion method, the oil pick-up ring should not be
used and the oil level gauge is not needed.
A circulating oil lubrication system typically
has supply lines attached to the housing cap and
drain lines attached to the base († fig. 15).
Circulation is normally produced with the aid
of a pump. After the oil has passed through the
bearing, it drains from the housing and flows
into a tank. It is filtered and, if required, cooled
before being returned to the housing. Proper
filtering and cooling of the oil are important
factors for bearing and oil service life, and can
provide improved machinery performance as
well as cost savings.
SKF supplies different standard solutions
for circulating oil lubrication systems. For
smaller systems, e.g. 1–2 fans or pumps, the
SM-100 Oil Circulating Unit is available. For
larger systems, SKF Flowline is available.
Relevant abutment dimensions for connect-
ing a circulating oil lubrication system to an
SONL housing are listed in table 7.

366