Article | REF: BM5372 V1

Ball bearings - Calculations. Hertz pressure and friction torque

Author: Pascal GUAY

Publication date: February 10, 2023

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4. Ball bearing friction

Friction in a bearing generates heat, which determines the operating temperature. Total rolling resistance is made up of :

  • rolling friction in ball/track contacts,

  • sliding friction in cage/ball and cage/guide ring contacts,

  • viscous friction of the lubricant,

  • and seal friction in protected bearings.

In the 1930s and 1940s, Palmgren established semi-empirical expressions for bearing friction torque. .

  • Assumptions: lubricated bearings, rotating at sufficient...

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Ball bearing friction