The permissible operating temperature for drawn cup needle roller bearings can be limited by:
- the dimensional stability of the bearing ring and rollers
- the cages
- the lubricant
Bearing rings and rollers
The bearings are heat stabilized up to 140 °C (285 °F).
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.
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.
- PUR: –30 to +100 °C (–20 to +210 °F)
FKM: –30 to +200 °C (–20 to +390 °F)
Temperatures up to 230 °C (445 °F) can be tolerated for brief periods.
When using lubricants not supplied by SKF, temperature limits should be evaluated according to the SKF traffic light concept.