(1) Cylindrical roller bearing, the rolling element is the centripetal rolling bearing of cylindrical roller. Cylindrical roller and raceway are line contact bearings. Large load capacity, mainly bearing radial load. The friction between the rolling element and the edge of the ferrule is small, which is suitable for high-speed rotation. There are single row bearings such as Nu, NJ, NUP, N and NF and double row bearings such as NNU and NN according to whether the ferrule has a retaining edge or not. The inner ring or outer ring can be moved axially and used as a free end. Axial force bearing capacity of the inner ring and outer ring with the retaining edges at one or both ends.

(2) Tapered roller bearings are widely used in large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, metallurgy, gas turbines, reduction boxes, rolling mills, vibrating screens and lifting and transportation machinery.