In bearings of this type, the cylindrical rollers are in linear contact with the raceways. They have a high radial load capacity and 

are suitable for high speeds.There are different types designated as NU, NJ, NUP, N, NF (for single-row bearings), NNU, and

NN (for double-row bearings depending on the design or absence of side ribs).The outer and inner rings of all types are 

separable.Some cylindrical roller bearings have no ribs on either the inner or outer ring, so the rings can move axially relative 

to each other. These can be used as free-end bearings. Cylindrical roller bearings, in which either the inner or outer rings 

has two ribs and the other ring has one, are capable of taking some axial load in one direction Double-row cylindrical roller 

bearings have high radial rigidity and are used primarily for precision machine tools.Pressed steel or machined brass cages 

are generally used, but sometimes molded polyamide cages are also used.Types NU, N, NNU, and NN are suitable as free-end 

bearings. Types NJ and NF can sustain limited axial loads in one direction. Types NH and NUP can be used as fixed-end 

bearings.NH-type cylindrical roller bearings consist of the NJ-type cylindrical roller bearings and HJ-type L-shaped thrust 

collars.The inner ring loose rib of an NUP-type cylindrical roller bearing should be mounted so that the marked side is on the outside.