The permissible operating temperature for spherical roller bearings can be limited by:
- the dimensional stability of the bearing rings
- the seals
- the lubricant
SKF spherical roller bearings undergo a special heat treatment. The bearings are heat stabilized up to at least 200 °C (390 °F).
The permissible operating temperature for seals depends on the seal material:
NBR: –40 to +90 °C (–40 to +195 °F)
Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.
- HNBR: –40 to +150 °C (–40 to +300 °F)
- FKM: –30 to +200 °C (–20 to +390 °F)
Temperature limits for the greases used in sealed SKF spherical roller bearings are provided in table 1. For temperature limits of other 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.