Cylindrical rollers and raceways are linear contact bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the ring flange is small, which is suitable for high-speed rotation. Depending on whether the ferrule has ribs, it can be divided into single-row cylindrical roller bearings such as NU, NJ, NUP, N, NF, and double-row cylindrical roller bearings such as NNU, NN. The bearing has a separable inner and outer ring structure.
Cylindrical roller bearings with no ribs on the inner or outer ring, the inner and outer rings can move relatively in the axial direction, so they can be used as free-end bearings. Cylindrical roller bearings with double ribs on one side of the inner ring and outer ring and a single rib on the other side can withstand a certain degree of axial load in one direction. Steel stamped cages or copper alloy solid cages are generally used. However, some use polyamide molding cages.
Large and medium-sized electric motors, rolling stock, machine tool spindles, internal combustion engines, generators, gas turbines, reduction gearboxes, rolling mills, vibrating screens, and lifting and transportation machinery