Permissible speed

The speed ratings in the product table indicate:
  • the reference speed, which enables a quick assessment of the speed capabilities from a thermal frame of reference
  • the limiting speed, which is a mechanical limit that should not be exceeded unless the bearing design and the application are adapted for higher speeds

When operating at ndm values approaching or exceeding 20 000 mm/min, the relubrication interval for grease can become very short (→ Selecting grease or oil). Therefore, oil lubrication is commonly used.

For additional information, refer to Operating temperature and speed.

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