bearing friction

The friction in a rolling bearing is made up of several components, see table below. Due to the large number of influencing factors, such as dynamics in speed and load, tilting and skewing resulting from installation, actual frictional torques and frictional power may deviate significantly from the calculated values.

Frictional component and influencing factor
Frictional component Influencing factor
Rolling friction Magnitude of load
Sliding friction of rolling elements
Sliding friction of cage
Magnitude and direction of load
Speed and lubrication conditions, running-in condition
Fluid friction
(flow resistance)
Type and speed
Type, quantity and operating viscosity of lubricant
Seal friction Type and preload of seal


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