Temperature limits

The permissible operating temperature for spherical roller bearings can be limited by:
  • the dimensional stability of the bearing rings
  • the seals
  • the lubricant
When temperatures outside the permissible range are expected, contact the SKF application engineering service.

Bearing rings

SKF spherical roller bearings undergo a special heat treatment. The bearings are heat stabilized up to at least 200 °C (390 °F) for 2 500 h, or for brief periods at even higher temperatures.

Seals

The permissible operating temperature for seals depends on the material:
  • NBR seals: –40 to +90 °C (–40 to +195 °F)
    Temperatures up to 120 °C (250 °F) can be tolerated for brief periods.
  • HNBR seals: –40 to +150 °C (–40 to +300 °F)
  • FKM seals: –30 to +200 °C (–20 to +390 °F)

Lubricants

Temperature limits for the greases used in SKF spherical roller bearings are provided in table 1 for sealed bearings and in table 2 for SKF E2 bearings. Temperature limits for other SKF greases are provided under Lubrication.
When using lubricants not supplied by SKF, the temperature limits should be evaluated according to the SKF traffic light concept.
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