(1) In general working conditions, the friction coefficient of the rolling bearing is small and will not change with the change of the friction coefficient. It is relatively stable; the starting and running torque is small, the power loss is small, and the efficiency is high.
(2) The radial clearance of the rolling bearing is small, and it can be eliminated by the method of axial preloading, so the operation accuracy is high.
(3) Rolling bearings have a small axial width, and some bearings can bear radial and axial composite loads at the same time, with compact structure and simple assembly.
(4) Rolling bearings are standardized components with a high degree of standardization and can be produced in batches, so the cost is low.
