Friction bearings mainly by Rolling ring roller rolling friction and sliding friction between tracks. Cage with rolling elements and the guide ring sliding friction between surfaces (no cage for the sliding friction between the rolling elements); sliding friction roller end and ring gear edge between faces; lubricant viscosity resistance ; sliding friction sealing device aspect, whose size depends on many factors type, size, load, speed, lubrication, sealing the bearing.

Require low friction torque equipment and machinery often use deep groove ball bearings, cylindrical roller bearings and self-aligning ball bearings to withstand radial load; choose single row thrust ball bearings to withstand load bearing, if subjected to combined load, can selected angular contact ball bearings, when the load angle and the contact angle is consistent, get minimal friction torque; if the angle is too large gap between the two, the choice of radial and thrust bearing assembly solutions to.

Choose low friction torque of bearings, structural design should avoid contact type seal. Meanwhile, low friction torque bearing lubrication should be used drip lubrication, oil mist lubrication and oil lubrication.