The friction in a rolling bearing determines the amount of heat generated by the bearing. The amount of friction depends on the loads and several other factors, including:
- bearing type and size
- operating speed
- properties and quantity of the lubricant
The total resistance to rotation in a bearing is the result of rolling and sliding friction in the contact areas, between the rolling elements and raceways, between the rolling elements and cage, and between the rolling elements and other guiding surfaces. Friction is also generated by lubricant drag and contact seals, if applicable.