Page 176 - SKF-bearing-housings

Split plummer block housings SNLN 30 series

with 10.9 class cap bolts. For these cap bolts, anchoring. Make sure that attachment bolts,
the values obtained from table 8 should be dowels or stops, and a sufficiently strong sup-
multiplied by a factor of 1,4. port can accommodate all occurring loads.
If a safety factor of 6 is used for the permis-
sible load of grey cast iron SNLN 30 housings,
the cap bolts do not need to be considered. In
this case, the permissible load of the housing
is less than the permissible load for the cap
bolts.

Operating temperature
The permissible operating temperature
is mainly limited by the seals († table 2,
page 162) and the lubricant in the bearing.
For temperature limits of SKF bearings and
lubricants, refer to the product information
available online at skf.com/bearings.
The housing material does not have any
additional temperature limits, except for very
low temperature applications where impact
strength could be a factor.
The housing paint is heat resistant up to
80 °C (175 °F) material temperature or 100 °C
(210 °F) ambient temperature.
When temperatures outside the permissible
range are expected, contact the SKF applica-
tion engineering service.

Operating speed
All seals, except non-contact labyrinth seals,
limit the permissible operating speed. Speed
limits for seals are provided in table 2 on
page 162. For speed limits of the bearing,
refer to the product information available
online at skf.com/bearings.

Attachment bolt recommendations
In typical applications, 8.8 class hexagon head
bolts in accordance with ISO 4014 can be used
together with washers. If the load does not act
perpendicularly toward the base, it may be
necessary to use stronger 10.9 class bolts.
SKF housings can withstand loads resulting
from tightening the attachment bolts to the
torque values recommended by bolt manufac-
turers († table 8, page 171). They are valid
for oiled, but otherwise untreated, thread
surfaces.
SKF cannot guarantee that tightening to
the recommended value provides sufficient

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