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.
The permissible operating temperature for O-rings is –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 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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