Page 472 - Rollingbearings

5 Thrust ball bearings
Temperature Permissible speed

limits
The speed ratings in the product tables
indicate:
The permissible operating temperature for
thrust ball bearings can be limited by: • the reference speed, which enables a
quick assessment of the speed capabilities
• the dimensional stability of the bearing from a thermal frame of reference
washers and balls • the limiting speed, which is a mechanical
• the cage limit that should not be exceeded unless
• the seat washer(s) the bearing design and the application are
• the lubricant adapted for higher speeds

Where temperatures outside the permissible For additional information, refer to Operating
range are expected, contact SKF. temperature and speed, page 130

Bearing washers and balls
5 Depending on their size, washers and balls Mounting
of SKF thrust ball bearings are heat stabilized
up to:
Where mounting a single direction thrust
• 125 °C (260 °F) where d ≤ 300 mm ball bearing, it is important to differentiate
• 150 °C (300 °F) where d > 300 mm between the shaft washer and the housing
washer The bore of the shaft washer is
Cages ground and always smaller than the bore of
the housing washer The shaft washer
Steel and brass cages can be used at the should always be placed against a shaft step
same operating temperatures as the bearing or ixed shaft component.
washers and balls

Seat washers

Seat washers are made of steel and can be
used at the same operating temperatures as
the bearing washers and balls

Lubricants

For temperature limits of SKF greases, refer
to Selecting a suitable SKF grease, page 116
When using lubricants not supplied by
SKF, temperature limits should be evaluated
according to the SKF trafic light concept
(page 117)

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