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Temperature limits

The permissible operating temperature for backing bearings can be limited by:
  • the dimensional stability of the bearing rings and rollers
  • the cage(s)
  • the seals
Where temperatures outside the permissible range are expected, contact SKF.

Bearing rings and rollers

SKF backing bearings are heat stabilized up to:
  • 150 °C (300 °F) where based on cylindrical or tapered roller bearings
  • 120 °C (250 °F) where based on needle roller bearings

Cages

Metal cages can be used at the same operating temperatures as the bearing rings and rollers.

Seals

The permissible operating temperature for seals depends on the seal material:
  • NBR: –40 to +100 °C (–40 to +210 °F)
    Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.
  • FKM: –30 to +200 °C (–20 to +390 °F)
    Temperatures up to 230 °C (445 °F) can be tolerated for brief periods.
  • HNBR: –40 to +150 °C (–40 to +300 °F)
  • Fey-ring seals can be used at the same operating temperatures as the bearing rings and rollers.
Typically, temperature peaks are at the seal lip.
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