Rolling bearing has a variety of structural types, and each type of bearing has its own characteristics. However they have the following common advantages:

(1)Small starting friction, small difference between the starting friction and the dynamic friction.

(2)The external dimensions are interchangeable and suitable for mass production.

(3)Less abrasion than ordinary sliding bearings, and rolling bearing can maintain mechanical accuracy for a long time.

(4)Easy lubrication, less lubricant consumption, low maintenance cost.

(5)It can be used in high or low temperature conveniently.

(6)The surrounding parts matched with the bearings have simple structure for easy inspection and maintenance.

(7)The rigidity of the bearing can be improved by applying preload.

(8)With the exception of few bearings (such as thrust bearings), ordinary rolling bearings can withstand both radial and axial loads.