Temperature limits

The permissible operating temperature for four-row tapered roller bearings can be limited by:
  • the dimensional stability of the bearing rings and rollers
  • the cages
  • the seals and O-rings
  • the lubricant
Where temperatures outside the permissible range are expected, contact SKF.

Bearing rings and rollers

SKF four-row tapered roller bearings are heat stabilized up to 150 °C (300 °F).

Cages

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

Seals and O-rings

The permissible operating temperature for seals depends on the seal material:

  • HNBR: –40 to +150 °C (–40 to +300 °F) 
  • FKM: –30 to +200 °C (–20 to +390 °F)
Typically, temperature peaks are at the seal lip.
O-rings are made of NBR and their permissible operating temperature limits are –40 to +100 °C (–40 to +210 °F).
Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.

Lubricants

For temperature limits of 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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