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Friction

Friction

The friction in a rolling bearing is the determining factor where heat generation in the bearing is concerned and consequently for the operating temperature. The amount of friction depends on the load and on several other factors, the most important of which are the bearing type and size, the operating speed, the properties of the lubricant and the quantity of lubricant. The total resistance to rotation of a bearing is made up of the rolling and sliding friction in the rolling contacts, in the contact areas between rolling elements and cage, as well as in the guiding surfaces for the rolling elements or the cage, the friction in the lubricant and the sliding friction of contact seals when applicable.