Cylindrical roller bearing belongs to separate bearing. This type of bearings is very convenient in assembly and disassembly. According to the rows of cylindrical rollers, it is divided into single row, double row and multi row cylindrical roller bearings. Single row cylindrical bearings are the most commonly used. Besides, there are also single-row and double-row full capacity roller bearings and other cylindrical roller bearings. WOW single row cylindrical roller bearings are classified into N type, NU,  NJ, NF and NUP type according to the flange of ferrule.
Cylindrical roller can bear great radial load. It is normally used in bearing strong radial load with strong bearing ability. In the use, it has high requirements on a strong radial degree, with higher limit rotation speed among roller bearings. According the structure of ferrule flange, it can bear a certain single way and double way axial load. NN type and NN -type double row cylindrical roller bearing structure are compact, with strong rigidity, big bearing capacity, small deforming after bearing, which are mostly used in bearing the main axle of the machine tool. FC, FCD, and FCDP four row cylindrical bearing can bear huge radial load, mainly used in heavy machines like rolling mills. Cylindrical roller bearings are suitable for disassembling and carrying mechanical and industrial machines of electric motors, machine tools, petroleum and rolling mills.