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Temperature limits

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

Bearing rings and rollers

The bearings are heat stabilized up to 120 °C (250 °F).

Cages

Steel cages can be used at the same operating temperatures as the bearing rings and rollers. For temperature limits of polymer cages, refer to Cage materials.

Seals

The permissible operating temperature for NBR seals is –40 to +100 °C (–40 to +210 °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 capped needle roller bearings are provided in table 1. For temperature limits of other 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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