For cylindrical roler bearing,the cylindrical rollers are in linear contact with the raceway,with a high capability to bear radial load,which is suitable for both heavy load and high-speed roatation.
Type N and NU can move axially and be adaptable to change in the realtive position between shaft and housing as a result of thermal expansion or installation error,which is best as bearing at free end.
Type NJ and NF can bear certain degree unidirectional axial load.
Type NH and NUP can bear certain degree bi-directional axial load.
inner ring or outer ring is separable to facilitate assembly and disassembly.
Type NNU ans NN has a high rigifity to reisist radial load,which are mostly used for machine tool main shaft.