Cylindrical Roller Bearings
The rolling element is a radial rolling bearing with cylindrical rollers, which is a separate type bearing, which is very convenient to install and disassemble. Cylindrical roller bearings are divided into single row, double row, and four rows. According to the number of rows of rolling elements used in the bearing, cylindrical roller bearings can be divided into single row, double row, and multiple row cylindrical roller bearings. Among them, single row cylindrical roller bearings with cages are more commonly used. In addition, there are cylindrical roller bearings with other structures such as single row or double row full complement rollers. Single row cylindrical roller bearings are divided into N-type, NU type, NJ type, NF type, and NUP type according to the different ring ribs. Cylindrical roller bearings have a large radial load capacity, and can also bear a certain unidirectional or bidirectional axial load according to the structure of the ring rib. NN type and NNU type double row cylindrical roller bearings are compact in structure, strong in rigidity, large in load capacity, and small in deformation after being loaded. They are mostly used for the support of machine tool spindles. FC, FCD, FCDP type four-row cylindrical roller bearings can withstand large radial loads and are mostly used on heavy machinery such as rolling mills. Cylindrical roller bearings are mainly used in motors, machine tools, petroleum, rolling mill handling machinery, and various industrial machinery.
Tapered Roller Bearings
The rolling element is a radial rolling bearing of tapered rollers. It can be separated, and the components composed of the inner ring, roller, and cage and the outer ring can be installed separately. The corrected contact line at the contact between the roller and the raceway can reduce stress concentration. Tapered roller bearings can withstand large radial loads and axial loads. Since the tapered roller bearing can only transmit one-way axial load, another tapered roller bearing (professional title computer test) installed symmetrically with it is needed to transmit the axial load in the opposite direction. The most used tapered roller bearings are single row tapered roller bearings. In the front wheel hubs of cars, small-sized double-row tapered roller bearings have also been used in recent years. Four-row tapered roller bearings are used in heavy machines such as large cold and hot rolling mills.
