Cylindrical roller bearing

The friction between the rolling element of cylindrical roller bearing and the retaining edge of ferrule is small, which is suitable for high-speed rotation. According to whether the ferrule has retaining edge or not, it can be divided into single row cylindrical roller bearings such as Nu, NJ, NUP, N and NF, and double row cylindrical roller bearings such as NNU and NN. The bearing is a separable structure of inner ring and outer ring. Cylindrical roller bearing with inner ring or outer ring without retaining edge, whose inner ring and outer ring can move relatively axially, can be used as free end bearing. A cylindrical roller bearing with double retaining edges on one side of the inner ring and the outer ring and a single retaining edge on the other side can bear a certain degree of axial load in one direction. Generally, steel plate stamping cage or solid cage made of copper alloy are used. However, some use polyamide shaped cages.
Characteristics of cylindrical roller bearing: the roller and raceway are in line contact or off-line contact, with large radial bearing capacity, which is suitable for bearing heavy load and impact load; Low friction coefficient, suitable for high speed, and the limit speed is close to the deep groove ball bearing; N-type and nu type can move axially, can adapt to the change of relative position between shaft and shell caused by thermal expansion or installation error, and can be used as free end support; The processing requirements for the shaft or seat hole are high. After the bearing is installed, the relative deflection of the outer ring axis should be strictly controlled to avoid contact stress concentration; The inner ring or outer ring can be separated for easy installation and disassembly.
The cylindrical roller is in line contact with the raceway and has large radial load capacity. It is not only suitable for bearing heavy load and impact load, but also suitable for high-speed rotation. The raceway and rolling element of cylindrical roller bearing are in geometric shape. After the improved design, it has high bearing capacity. The new structural design of retaining edge and roller end face not only improves the axial bearing capacity of the bearing, but also improves the lubrication conditions in the contact area between roller end face and retaining edge, and improves the service performance of the bearing.
It is mainly used for large and medium-sized motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction boxes, rolling mills, vibrating screens and hoisting and transportation machinery.