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Temperature limits

The permissible operating temperature for self-aligning ball bearings can be limited by:
  • the dimensional stability of the bearing rings and balls
  • the cage
  • the seals
  • the lubricant
When temperatures outside the permissible range are expected, contact the SKF application engineering service.

Bearing rings and balls

SKF self-aligning ball bearings undergo a special heat treatment. The bearings are heat stabilized up to at least 120 °C (250 °F).


Steel or brass cages can be used at the same operating temperatures as the bearing rings and balls. For temperature limits of polymer cages, refer to Cage materials.


The permissible operating temperature for NBR seals is –40 to +100 °C (–40 to +210 °F). Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.


Temperature limits for the greases used in sealed SKF self-aligning ball bearings are provided in table 1. Temperature limits for other SKF greases are provided under Lubrication.
When using lubricants not supplied by SKF, the temperature limits should be evaluated according to the SKF traffic light concept.
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