Cylindrical roller bearing

Cylindrical roller and raceway for the line of contact. The bearing load capacity, mainly bear radial load. Ring wall and rolling friction small, suitable for high-speed rotation. According to the ferrule has without ribs, can be divided into NU, NJ, NUP, N, NF and NNU single row cylindrical roller bearings, double row cylindrical, NN etc. roller bearing

N, type NU cylindrical roller bearing
The outer ring of N type bearings without flanges, both sides of the inner ring rib. Allowing axial displacement on two directions.NU axis relative bearing bearing outer ring on both sides of a rib, without inner ring ribs. Can also be allowed in two directions on the axial displacement between the axis relative to the bearing seat. Therefore and this kind of structure is suitable for use as a moving end bearing.

NJ, type NF  cylindrical roller bearing

NJ type bearing outer ring on both sides of a flange, inner ring outer ring with single rib. Unilateral axial load type.NF can tolerate a certain amount of a flange, on both sides of the inner ring rib. Axial load can bear a certain amount. Therefore, this kind of structure is applied as a single axial direction locating bearing with

NUP, type NFP cylindrical roller bearing

NUP type of bearing is the outer ring on both sides of the retaining edge, one side of the inner ring (fixed) single side, while the other side of the detachable flat ring
NFP type bearing outer ring side band (fixed) single flange, and the other side is a detachable flat ring, on both sides of the inner ring rib. Double axial load can also bear a certain amount. This kind of structure bearing can limit axis relative to the bearing seat in the axial displacement of two directions. Therefore, suitable for the fixed end bearing.

NH (NJ+HJ) type cylindrical roller bearing

NH type bearing structure is NJ type and HJ type cable bearing ring after combination. Because the NUP type of the inner ring of the bearing is short, with a flat ring is not fixed, the use is not convenient, and the NH type bearing can use NJ type bearing the inner ring width, and the shaft to keep closer cooperation. And the NH axis in the installation and disassembly is more convenient.
The NH type bearing can limit the axial displacement of the shaft relative to the bearing seat in two directions, so it is suitable to be used as a fixed end bearing

Double row bearing cylindrical roller bearing

Double row cylindrical roller bearings with cylindrical bore and a conical inner hole (bearing post code and K) two kinds of structure. This kind of bearing has the advantages of compact structure, high rigidity, large bearing capacity, the advantages of small deformation under load, especially suitable for machine tool spindle bearing. A conical inner hole can also play the role of trace adjust the clearance, and can simplify the positioning device structure, convenient installation and disassembly. Double row cylindrical roller bearings used in the following forms:
NN, type NNU  cylindrical roller bearing

The outer ring of the NN bearing is not blocked, and the middle of the inner side of the inner ring is provided with a middle edge, which can allow the shaft to generate the displacement of two directions in the axial direction relative to the bearing seat
NNU type bearing outer ring on both sides of a flange and a middle rib, without inner ring ribs. Allows the displacement between the axis relative to the bearing seat in the axial direction of two. Therefore, this structure is suitable for moving end bearing. This type of bearingretainer used car business entity retainer.

NNF type bearings are double row full complement cylindrical roller bearings, bearing is composed of a belt retaining edges of outer ring, two structure double ribbed inner ring. The roller comprises an inner ring rib guide, the two ring is fixed by the fastening ring together. The structure can bear large radial load and axial load. Can also withstand overturning moment, therefore, used as a fixed end bearing.
NNF type bearing on both sides of the contact seal. The bearing is filled with lubricating grease, grease working temperature is -50 DEG to +110 DEG C, but due to the sealing material limit, the working temperature of the bearing is limited to -40 DEG to +80 DEG. The condition of the use of better circumstances, with NNF sealingbearing no need for maintenance, if the bearing in the long-term water or pollute the environment, and in the high-speed operation, can be added on bearing lubrication by oil ring groove and lubrication holes.
Four row bearing
Four row cylindrical roller bearings are used mainly for cold, hot rolling machine, cogging mill, rolling mill machinery, bearing a separated structure, bearing rings and rolling body assembly can be conveniently separated, therefore, the bearing cleaning, inspection and assembly and disassembly are very convenient.
Type FC cylindrical roller bearing

FC bearing consists of two outer rings and an inner ring, each side of the outer side of the outer side of the middle of the retaining wall, the inner ring without blocking
Type FCD cylindrical roller bearing

FCD type bearing is actually made up of two NN type bearings
FC type and FCD type bearings can allow the shaft relative to the bearing seat between the axial displacement of two directions. Therefore, this structure is suitable for the end of the bearing. The type of bearing cage using the car body 13:58
Cylindrical roller bearings are mainly used in compressors, pumps, wind energy equipment, gear boxes, unbalanced exciter and other equipment
The main parameters of the cylindrical roller bearing: with high speed capacity; can bear axial displacement; separable design
Accuracy grade cylindrical roller bearing

According to the level of accuracy, the roller bearings can be divided into PO, P6, P5, P4, P2., 
Bearing use
Large and medium-sized motor, locomotive and rolling stock, machine tool spindle, internal combustion engine, generator, gas turbine, speedreducer, rolling mill, vibrating screen and hoisting and conveying machinery