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Temperature limits

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

Bearing rings

The rings of CARB bearings are heat stabilized up to 200 °C (390 °F).

Cages

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

Seals

The permissible operating temperature for seals depends on the seal material:
  • HNBR: –40 to +150 °C (–40 to +300 °F)
  • NBR: –40 to +90 °C (–40 to +195 °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 greases used in sealed CARB bearings are provided in table 1. For temperature limits of other SKF greases, refer to Selecting a suitable grease.
When using lubricants not supplied by SKF, temperature limits should be evaluated according to the Traffic light concept.
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