A&F Bearing Cylindrical Roller Bearing NJ304E for Axial Positioning

Cylindrical roller bearing technology definitions
English Name: cylindrical roller bearing definition: the rolling body is cylindrical roller rolling bearing. Application of disciplines: Mechanical Engineering ( a subject ); mechanical parts ( two subjects ); rolling bearing ( three subjects ) the content by the National Committee for terms in sciences and technologies validation published
Cylindrical roller bearing cylindrical roller bearing rolling body is cylindrical roller rolling bearing. Cylindrical roller bearing cylindrical roller and raceway for the line of contact bearing.Large 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, rolling bearing, and NNU, NN double row bearing. The bearing inner ring, outer ring can beseparated structure. The inner ring or outer ring without rib of cylindrical roller bearing, theinner ring and the outer ring can axially move relatively, so it can be used as a free end bearing.In the inner and outer rings on one side of the double rib, the other side of the ferrule has a single rib of cylindrical roller bearings, can withstand a certain degree of one direction axialload. General stamping steel cage, or copper alloy machined cage. But there are also a part of the use of polyamide forming the holder. Cylindrical roller bearing characteristics: 1 roller and racewaycontact or line contact line repair, radial load capacity, applicable to bear heavy load and shock load. 2 the friction coefficient is small, suitable for high speed, speed limit is closer to the deep groove ball bearing. 3 type N and type NU axially movable, can adapt due to thermal expansion and installation error of shaft and the housing relative position changes, can be used as a free end bearing using. 4 axis or hole processing requirements of high bearing outer ring, after the installation axis relative deviation should be strictly controlled, so as to avoid the contact stress concentration. The 5 inner ring or outer ring can be separated, which is convenient for installing and detaching. Main applications: large and medium-sized motors, locomotives, machine tool spindle,internal combustion engine, generator, gas turbine, gearbox, rolling mill, vibration sieve andlifting the transport machinery. Structure: 1 outer ring flange free N0000 type and NU0000 typewithout inner ring rib of cylindrical roller bearing in the bearing can accept large radial load,high limit speed, not shackle shaft or to the casing of the axial displacement, cannot accept axial load. In 2, the outer ring with the rib of cylindrical roller bearing NJ0000 type, NF0000 typebearings can shackle shaft or to the casing in an axial direction of displacement, and can acceptsmaller axial load. NU0000+HJ0000 type, NJ0000+HJ0000 type, NUP0000 type bearing, in the importingbearing axial clearance in the field of shackle shaft or to the casing two directions of the axial displacement. And can accept smaller two-way axial load.
Editor this paragraph of cylindrical roller bearing type
Cylindrical roller bearing is separable bearing, is very convenient to assemble and disassemble.Cylindrical roller bearings can bear large radial load and is suitable for high-speed operationoccasions. Bearing inner ring and outer ring allows such axis axis angle error ( tilt) is very small,only 2 ' - 4'. Therefore, the shaft and the bearing seat of the machining accuracy is relatively highotherwise, easy in the raceway contact sites appear uneven load or stress concentration. But on theroller or raceway contact bus correction can reduce the stress concentration happens. Cylindrical roller bearings for rolling body according to the number of columns is different, can be divided intosingle, double and multiple row cylindrical roller bearings and other structures. Different structurebearing is also reflected in the baffle position design. One of the commonly used cylindrical roller bearing has the following several forms: single row cylindrical roller bearings: single row cylindrical roller bearing is separable bearing, convenient installation and disassembly, a twoferrule can adopt the tight fit, modified between roller and raceway contact line can reduce the stress concentration. Double row cylindrical roller bearings: double row cylindrical roller bearingsbelongs to walk its separability bearing, so that the mounting and dismounting is convenient. The tworings can be used in tight fit. Double row cylindrical roller bearings have not tilt angle. Single row cylindrical roller bearing N, NU N bearing outer ring without ribs, the inner ring on opposite sides of a flange. Allows the axis relative bearing block in the axial displacement on two directions. NU type bearing outer ring on both sides of a rib, without inner ring ribs. Also allows the axis relative bearing block in the axial displacement on two directions. Therefore, this kind ofstructure is suitable for use as a moving end bearing. NJ, NF NJ bearing outer ring on both sides of a flange, inner ring with single rib. Can tolerate a certain amount of axial load. NF type outer ringwith single retaining side, on both sides of the inner ring has a flange. Can bear a certain amount of axial load. Therefore, this kind of structure is applied as a single axial direction locatingbearing. NUP, NFP NUP type of bearing outer ring on both sides of a flange, inner side of the band (fixed ) a single flange, and the other side is a detachable flat retainer ring. Can tolerate a certain amount of bi-directional axial load. NFP type bearing outer ring side band ( fixed ) a single flange, and the other side is a detachable flat check rings, on both sides of the inner ring withflange. It can tolerate a certain amount of bi-directional axial load. This kind of structure bearingcan limit the axis relative to the bearing seat in the axial displacement of two directions.Therefore, suitable for use as a stationary end bearing. NH ( NJ+HJ ) NH bearing is of type NJ and type HJ thrust collar bearing combined structure. Because of the NUP type of the inner ring of the bearing is short, with a flat block ring is not fixed, the use is not convenient, and the NH type bearing can use NJ type bearing the entire inner ring width, and the shaft to keep closer cooperation. And the NH type bearing in installation and disassembly is more convenient. The NH type bearing can limit the axis relative to the bearing seat in the axial displacement of two directions.Therefore, suitable for use as a stationary end bearing. Double row cylindrical roller bearing,double row cylindrical roller bearings with cylindrical bore and a conical inner hole ( bearing postcode and K ) two kinds of structure. This type of bearing has the advantages of compact structure,high rigidity, large bearing capacity, small deformation under load etc, especially suitable for themachine tool spindle bearing. A conical inner hole can also play the role of trace adjust the clearance, and can simplify the structure of the locating device, convenient installation and disassembly. Double row cylindrical roller bearings used in the following several forms: NN, NNU NNbearing outer ring without ribs, on both sides of the inner ring with flange intermediate block edge.Allows the shaft bearing seat in the axial direction generated between the relative displacement of two directions. NNU type bearing outer ring on both sides of a flange intermediate in the rib,without inner ring ribs. Allows the shaft bearing seat in the axial direction generated between the relative displacement of two directions. Therefore, this structure is suitable for moving end bearing. This type of bearing retainer used car business entity retainer. NNF NNF bearings are double-row cylindrical roller bearing, the bearing is composed of a belt retaining edges of outer ring, two double ribbed inner ring structure. Roller comprises an inner ring rib guide, two inner ring with the fastening ring is fixed together. The structure can bear large radial load and axial load, can also withstand overturning moment, therefore, is used as a fixed end bearing. Type NNF on both sides of the bearing adopts the contact type seal. The bearing is filled with lubricating grease, grease working temperature of - 50 C to + 110 C, but as a result of the packing material limit, the working temperature of the bearing is limited to - 40 C to + 80 C. In the use of conditions better circumstances, with NNF sealing bearing no need for maintenance, if the bearing in the long-term water or pollute the environment, and, in the high-speed operation, through the outer ring of the oil groove and oil holes on the bearing lubrication to supplement. Four row cylindrical roller bearings of four row cylindrical roller bearings are used mainly for cold, hot rollingmachine, cogging mill, rolling mill machinery, bearing to a separate structure, bearing rings and rolling body assembly can be conveniently separated, therefore, the bearing cleaning, inspection andassembly and disassembly are very convenient. FC FC bearing consists of two outer ring and an inner ring, each ring on opposite sides of a flange intermediate in the rib, without inner ring ribs. FCDFCD bearing is actually composed of two NN type bearing assembly. FC type and FCD type bearing allows the shaft bearing seat in the axial direction generated between the relative displacement of two directions. Therefore, this structure is suitable for moving end bearing. This type of bearingretainer used car business entities in 13 : 58.