The cylindrical roller and raceway are linear contact bearings. It has a large load capacity and mainly bears radial loads. The rolling element has little friction with the retaining edge of the ring, making it suitable for high-speed rotation. According to the presence or absence of retaining edges on the ring, there are single row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double row cylindrical roller bearings such as NNU and NN. This bearing is a separable structure with inner and outer rings.

Cylindrical roller bearings without retaining edges on the inner or outer ring can move relative to the axial direction, making them suitable for use as free end bearings. A cylindrical roller bearing with double retaining edges on one side of the inner and outer rings, and a single retaining edge on the other side of the ring, which can withstand a certain degree of axial load in one direction. Generally, steel plate stamped cages or copper alloy solid cages are used. But there is also a portion that uses polyamide formed cages.

Single row cylindrical roller bearing: Single row cylindrical roller bearing is a separable bearing that is easy to install and disassemble. Both rings can be tightly fitted, and the modified contact line between the roller and raceway can reduce stress concentration.

Double row cylindrical roller bearings: Double row cylindrical roller bearings belong to the category of floating bearings, and their separability makes installation and disassembly very convenient. Both collars can be tightly fitted. Double row cylindrical roller bearings almost never allow inclination angles.

Four row cylindrical roller bearings are mainly used in steel rolling machines such as cold and hot rolling mills and billets. The bearings have a separated structure, and the bearing rings and rolling element components can be easily separated. Therefore, the cleaning, inspection, installation, and disassembly of the bearings are very convenient.

Mainly used in large and medium-sized electric motors, locomotives and vehicles, machine tool spindles, internal combustion engines, generators, gas turbines, gearboxes, rolling mills, vibrating screens, and lifting and transportation machinery.