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Cylindrical roller bearings mainly support radial loads. Since the rolling body is cylindrical, it has a higher load capacity. The rollers are guided by the inner and outer ring’s rib. The inner and outer rings can be installed on the shaft or in the bearing housing wiht tight fit respectively. If there is no rib, the roller can move freely along the axis.
Cylindrical roller bearings are especially suitable for “free end” bearings, which can withstand lighter axial load when there is a rib.
According to different usage, cylindrical roller bearings can be divided into E-type and EC-type design, so as to improve the bearing’s radial and axil load carrying capacity.
This type of bearing is often used to support radial loads. Only single row bearings with ribs on both inner and outer rings can support low constant axial loads or high axial interval loads. Compared to deep groove ball bearings with the same dimensions, the radial load capacity of this type of bearing is greater.
Single row cylindrical roller bearings have the following types: N, NU, NJ, NF, NUP, etc.
Double row cylindrical roller bearings are featured by small cross section, high load capacity and rigidity. They are mainly used in machine tools, rolling mill necks, plastic rollers, grinders as well as large gear cases, etc.
C&U specializes in manufacturing NN type and NNU type double row cylindrical roller bearings. The rings and components of this type of bearings can be mounted separately. NNU type double row cylindrical roller bearings outerrings, rollers and cage components can be mounted separately with its inner rings. Or all the parts can be mounted separately to facilitate the mounting, inspection and maintenance of bearings.
There are two types of the internal bores of double row cylindrical roller bearings: cylindrical bore and tapered bore. C&U provides both cylindrical bore and tapered bore type for NN and NNU bearings. When the bearings with tapered bores are mounted, a certain radial interior clearance or preload might be achieved.
The outer rings of some double row cylindrical roller bearings have lubricating grooves or oil holes, which both C&U are able to provide. If they are not listed in the dimension table, please consult the technical center of C&U Group.
Double row cylindrical roller bearings have the following types: NN, NNF, NNU, usw.
Four-row cylindrical roller bearings are known for their simple structure, high accuracy, high dynamic load rating, etc. However, they are in capable of taking axial load. Because the inner ring has no rib, the inner ring and outer ring with components can be mounted separately (with full set of roller and cage). Therefore, they are easy to mount and dismount, and are the first choice for various cold and hot rolling mills whose rolls are frequently changed.
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