Cylindrical rollers and raceways are linear bearings. Load capacity, mainly bear radial load. The friction between the rolling element and the ferrule is small, suitable for high-speed rotation.
According to the presence or absence of ribs, there are NU, NJ, NUP, N, NF single row bearings, and NNU, NN type double row bearings.
The bearing inner ring and outer ring can be separated.
Cylindrical roller bearings with no ribs on the inner ring or outer ring can move axially relative to the inner ring and outer ring, so they can be used as free-end bearings.
Cylindrical roller bearings with double ribs on one side of the inner ring or outer ring and single ribs on the other side of the ring can withstand a certain degree of axial load in one direction.
Double-row cylindrical roller bearings have high rigidity against radial loads and are mainly used for machine tool spindles.
Generally use steel plate stamping cage, or copper alloy car cage. But some also use polyamide shaped cages.
According to the presence or absence of the flange of the cylindrical roller bearing ring, it is divided into the following shapes.
Types NU, N, NNU and NN are suitable for free-side bearings. NJ type and NF type can withstand a certain degree of axial load in one direction. NH type and NUP type are used as fixed side bearings.
NH type cylindrical roller bearing is assembled by NJ type cylindrical roller bearing and L-shaped rib ring. When installing the NUP bearing, the lettering side of the retaining ring should face outward.