NN3034K Double Row Cylindrical roller Bearings mill roll bearing

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Product Description:

Specification of Double Row Cylindrical roller bearings:


Double row Cylindrical roller bearings belong to separable bearings, whose inner and outer rings are linearly contacted with rollers. They have small friction coefficient, bigger capacity of bearing  radial load and are applicable to both bearing heavy load and impact load and high-speed rotation. Cylindrical roller bearings have the advantages of compact structure, strong stiffness, big bearing capacity, small deformation after loaded etc.


CNBM has already successfully developed split cylindrical roller bearings which can be freely installed at any time and any place, to meet the demand of driving and conveying rollway bearings at cooling area of continuous casting. CNBM also can provide special cylindrical roller bearings according to requirement of customers.


Product Application: 


- Iron and steel metallurgical industry

- Medium and large motor

- Generator

- Combustion engines

- Machine tool spindle

- Speed reducer

- Loading and unloading machinery and all kinds of industrial machinery



Double row cylindrical roller bearings


- NN double row cylindrical roller bearings

This kind of bearings with inner rid, no outer rid. This assembly part  can be separated from another ring, and they have larger radial load capacity than other single row cylindrical roller bearings with the same size, but the axial or housing is free axial displacement, so this kind of bearings can only bear the axial load.


- NNU, NNU…K double row cylindrical bearings

NNU,NNU...K type bearings with outer rid, no inner rid. There are tow kinds of holes, one is cylindrical hole, and another is tapered hole. Axial or housing is free axial displacement, so this kind of bearings can not bear the axial load. But these kind of bearings have larger radial load capacity than other single row roller bearings with the same size.


- NUP single row cylindrical roller bearings

NUP type bearings with double outer rid, single inner rid and  loose rid, this design is possible to limit the axial displacement of the shaft or the housing in double direction within the scope of the axial clearance. in addition they mainly used to bear radial load, also can withstand diameter, the axial union load. Therefore this NUP suitable for fixed end bearings.


- NNCF double row cylindrical bearings

NNCF type bearings with three inner rids and one outer rid. They can take a direction axial positioning. There is a fixed ring in the other side of the outer rid, it can make bearing keep as one.


Double Row Cylindrical Roller Bearings Catalogue:


DesiganationsBasic load rating KNPrincipal dimensionsSpead   ratings
    rpm.
Weight


CrCordDBrEw.FwGreaseOilkg
 NN3032K   345   675   160   240   60   2.1   219   3800   3200   8.39  
 NN3032KTN1   345   335   160   240   60   2.1   219   3800   3200   7.86  
 NN3032K/W33   345   675   160   240   60   2.1   219   3000   2200   8.38  
 NN3032K/YB2   345   675   160   240   60   2.1   219   3000   2200   8.39  
 NN3032   345   675   160   240   60   2.1   219   3000   2200   8.38  
 NN3034K   435   860   170   260   67   2.1   236   3600   3000   12.9  
 NN3034/YA8   435   860   170   260   67   2.1   236   3000   2200   13.3  
 NN3036K   555   1090   180   280   74   2.1   255   3400   2800   16.9  
 NN3036   555   1090   180   280   74   2.1   255   2800   2000   16.9  
4382936 337   703   180   250   69   2.3   201   2800   2000   9.8  
 NN3038K   565   1140   190   290   75   2.1   265   3200   2600   17.9  
 NN3038K/W33   565   1140   190   290   75   2.1   265   2600   1900   17.1  
 NN3038   565   1140   190   290   75   2.1   265   2600   1900   18  
 NNU4938B-W33   560   1250   190   260   69   3   212   2600   1900   11  
 NNU6038   1260   3200   190   290   180   2.1   219   2600   1900   43.6  
 NN3034K   675   1340   200 310  82   2.1   282   3000   2400   22  
 NN3034  6751340200310822.12822400190022.1
 NN3044K  79516102203409033102800220030.1
 NN3044K/W33  79516102203409033102200180030
 NN3044  79516102203409033102200180031
 NN3048K  81016902403609233302600200032.7
 NN3048  81016902403609233302000170031.6
 482752U  6051500260360802.12821600190028.2
 NN3056K  1060229028042010643842200180049.7
 NN3056  1060229028042010643841700140052.3
31821601290279030046011844181200150076.2
32821601290279030046011844181200150077.9
 31821/600  405098506008702006805600800384
 32821/600K  405098506008702006805600800403
 31821/630  4350106006309202127.5850550750438
 32821/630K  4350106006309202127.5850550750460
 NN3030K  330650150225562.1206400034007.7
 NN3030/YA8  330650150225562.1206400034007.7
 NN3030  330650150225562.1206320024007.75
 NN3030/C9  330650150225562.1206320024007.75
 NN3030/C9YA8  330650150225562.1206320024007.79
 NN3030K/C91W33  330650150225562.1206320024007.7



           


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Q:How to check the thrust cylindrical roller bearings?
Bearing dimensions (or bearing samples) have "basic rated load (KN)", this column can be directly detected, in general, according to the use of appropriate multiplied by a (1.2~1.5) safety factor. In accordance with the requirements of the design manual, the equivalent load can be calculated (considering the speed, temperature, load and stability).
Q:Is the nu240em cylindrical roller bearing split?
No, nu240em cylindrical roller bearings are integral.Bearing type: cylindrical roller bearingNew model: NU240EMOld model: 32240EHInternal diameter (mm):200Outside diameter (mm):360Width (mm):58
Q:Can the cylindrical roller bearings bear axial force?
The answer upstairs is clear. Such bearings can not be designed with axial force. In use, the inner and outer rings of the bearing can have larger axial displacement, and the aim is to compensate the length change caused by the rotating part of the two bearing due to the temperature rise.
Q:Cylindrical roller bearings, mounting dimensions, specific meaning? Twenty
This is a bit too small to understand, because different installation methods are different from each other. It is recommended that the landlord refer to the installation of cylindrical roller bearings, the above is very clear.
Q:Does the thrust cylindrical roller bearing need a bearing seat?. Five
Hello, I have sent a message to your mailbox, I hope you can help! Have problems you can contact us directly, Beijing Sheng Yi Huitian Electromechanical Equipment Co. Ltd
Q:How much is the shaft shoulder height of the 81105 cylindrical roller bearings with inner diameter 25mm?
The shoulder height (diameter) shall be smaller than the big diameter of the bearing (less than 42), mainly for easy unloading.
Q:Attention problems of cylindrical roller bearings
1. The installation of bearings must be carried out in a dry, clean environment. Before installation, the machined surface of the shaft and shell, the shoulder end, the groove and the joint surface shall be carefully inspected. All mating surfaces must be carefully cleaned and removed, and the cast surface must be clean. 2, before the installation of bearings, should be cleaned with gasoline or kerosene, dry after use, and ensure good lubrication, bearings generally grease lubrication, oil lubrication can also be used. Grease lubrication, grease, anti rust, extreme pressure and other excellent greases should be used. Grease filling capacity for bearings and bearing box volume of 30%-60%, should not be too much. Double row tapered roller bearing and water pump shaft bearing with sealing structure have been filled with grease, which can be used directly by users and can not be cleaned again. 3, bearing installation, must be applied equally in the circumference of ferrule end face pressure to press into the ring, and may not directly tap bearing end face to the top tool, so as not to damage the bearing. Small amount of interference in the case, at room temperature can be used to suppress sleeve bearing ring face, beating with a hammer sleeve, the sleeve will be pressed into the ring balance. If installed in large quantities, use hydraulic press. When pressing, the outer end surface of the outer ring and the outer shoulder of the shell face shall be ensured, and the inner ring end face is tightly pressed with the shoulder end of the shaft platform, and no gap is allowed.
Q:How are the twin row cylindrical roller bearings classified?
Classification of double row cylindrical roller bearings:The NN0000 type cylindrical roller bearingsThe bearings are compact in structure and small in deformation under load, so they are especially suitable for the support of the spindle of machine tools. Because of its no outer wall, so you can install the outer ring and the inner ring assembly respectively (with roller and cage), does not limit the axial displacement of the shaft or housing, compared with the single row cylindrical roller bearing with the same radial size, can bear larger radial load.
Q:I would like to ask again, cylindrical roller bearings prefix prefix code, what does that mean? Five
N outer ring without edge, inner ring double edgeRNU no inner ring, NU typeNUP outer ring, double retaining ring, inner ring, single edge, with flat retaining ringNF outer ring, single edge, inner ring, double edgeNO doesn't know
Q:How should I find the concentricity of cylindrical roller bearings after installation?
Any form of assembly, adjustment center is a very troublesome thing, but also in the measuring installation is not very complete, the usual method is to in the base below (or below) thin copper with different thickness, until you feel better, but each installation to re adjust.

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