Temperature limits

The permissible operating temperature for insert bearings can be limited by:
  • the dimensional stability of the bearing rings and balls
  • the cage
  • the seals
  • the lubricant
Where temperatures outside the permissible range are expected, contact SKF.

Bearing rings and balls

SKF insert bearings are heat stabilized up to at least 150 °C (300 °F).

Cages

For temperature limits of PA66 cages, refer to Cage materials.

Seals

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.

Typically, temperature peaks are at the seal lip.

Lubricants

Temperature limits for the greases used in SKF insert bearings are provided in table 1. For temperature limits of other SKF greases, refer to SKF greases.
When using lubricants not supplied by SKF, temperature limits should be evaluated according to the SKF traffic light concept.
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