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Temperature limits

The permissible operating temperature for hybrid deep groove ball bearings can be limited by:
  • the dimensional stability of the bearing rings
  • the cages
  • the seals
  • the lubricant
When temperatures outside the permissible range are expected, contact the SKF application engineering service.

Bearing rings

The rings of SKF hybrid deep groove ball bearings undergo a special heat treatment. Depending on the variant, hybrid bearings are heat stabilized up to:
  • 120 °C (250 °F) for basic design hybrid bearings
  • 150 °C (300 °F) for XL hybrid bearings
On request, SKF can supply hybrid deep groove ball bearings with rings stabilized for operating temperatures up to 300 °C (570 °F).


Steel or PEEK cages can be used at the same operating temperatures as the bearing rings of standard hybrid bearings. For temperature limits of other polymer cages, refer to Cage materials.


The permissible operating temperature for seals depends on the material:
  • NBR seals:
    –40 to +100 °C (–40 to +210 °F)
    Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.
  • FKM seals:
    –30 to +230 °C (–20 to +445 °F)


Temperature limits for the grease used in sealed SKF hybrid deep groove 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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