The permissible operating temperature for insert bearings can be limited by:
- the dimensional stability of the bearing rings and balls
- the cage
- the seals
- the lubricant
Bearing rings and balls
SKF insert bearings are heat stabilized up to at least 150 °C (300 °F).
For temperature limits of PA66 cages, refer to Cage materials.
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.
When using lubricants not supplied by SKF, temperature limits should be evaluated according to the SKF traffic light concept.