Cylindrical roller bearings are commonly separable and easy to mount and dismount. There are single row, double row and multi-row cylindrical roller bearings. The widely used bearings are cylindrical roller bearings with cage. There are single or double row bearings with a full complement of rollers and other bearing arrangements. Cylindrical roller bearings have high radial load carrying capacity and are also suitable for high speed.
LEGEND single row cylindrical roller bearings of type N have two integral ribs on the inner ring and an outer ring without rib, and the type NU bearings have two integral ribs on the outer ring and an inner ring without rib according to different integral ribs. However, axial displacement of the shaft with respect to the housing is permitted in both directions with certain limits and the bearings are therefore suitable as non-locating bearings. Type NJ bearings have integral ribs on the outer ring and one integral rib on the inner ring. Type NF bearings have two integral ribs on the inner ring and one integral rib on the outer ring. The features of type NJ and type NF are that axial displacement can be provided for the shaft in one direction. Type NUP bearings have two integral ribs on the outer ring and one rib and one loose rib on the inner ring, enabling bearings to locate a shaft axially in both directions. Type NU and NJ bearings can be used with HJ angle ring on different applications.
The cages of single row cylindrical roller bearings are supplied with pressed steel cages or machined solid cages. Bearings with glass fiber reinforced plastic cage can be designed and provided according to different applications and customer¡¯s demands.
The two arrangements of LEGEND double row cylindrical roller bearings are cylindrical bore and tapered bore. These types of bearings are compact in structure, and of high rigidity, high capacity and less deformation under load, especially suitable for supporting spindles of machine tools. The bearings of type NN have two integral ribs on the inner ring and an outer ring without rib, and the bearings of type NNU have two integral ribs on the outer ring and an inner ring without rib, permitting axial displacement of shaft relative to the housing. These two types of bearings are used as non-locating bearings. The cages are supplied with a machined solid cage.
Cylindrical roller bearings of the E type have an appreciably higher load carrying capacity and longer service life for the same boundary dimensions than earlier designs due to improvement to the integral design, increasing number of rollers and enlarging dimension of rollers, etc. To differ from the earlier design, it is identified by suffix E.
Four-row cylindrical roller bearings of types FC and FCD apply to cold, hot rolling mills, bloomers and other heavy machineries. These types of bearings are separable rings and rolling element units are easy to separate, clean, inspect and dismount.
single row (N, NU, NJ, NF, NUP, NFP, NH)
double row (NN, NNU, NNF)
four row (FC, FCD)
Cage: pressed cage, solid cage, nylon cage