Double Row Cylindrical roller Bearings mill roll bearing bearings
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 5000000 pc/month
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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:
Desiganations | Basic load rating KN | Principal dimensions | Spead ratings rpm. | Weight | |||||||||||
Cr | Cor | d | D | B | r | Ew.Fw | Grease | Oil | kg | ||||||
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 | 675 | 1340 | 200 | 310 | 82 | 2.1 | 282 | 2400 | 1900 | 22.1 | |||||
NN3044K | 795 | 1610 | 220 | 340 | 90 | 3 | 310 | 2800 | 2200 | 30.1 | |||||
NN3044K/W33 | 795 | 1610 | 220 | 340 | 90 | 3 | 310 | 2200 | 1800 | 30 | |||||
NN3044 | 795 | 1610 | 220 | 340 | 90 | 3 | 310 | 2200 | 1800 | 31 | |||||
NN3048K | 810 | 1690 | 240 | 360 | 92 | 3 | 330 | 2600 | 2000 | 32.7 | |||||
NN3048 | 810 | 1690 | 240 | 360 | 92 | 3 | 330 | 2000 | 1700 | 31.6 | |||||
482752U | 605 | 1500 | 260 | 360 | 80 | 2.1 | 282 | 1600 | 1900 | 28.2 | |||||
NN3056K | 1060 | 2290 | 280 | 420 | 106 | 4 | 384 | 2200 | 1800 | 49.7 | |||||
NN3056 | 1060 | 2290 | 280 | 420 | 106 | 4 | 384 | 1700 | 1400 | 52.3 | |||||
3182160 | 1290 | 2790 | 300 | 460 | 118 | 4 | 418 | 1200 | 1500 | 76.2 | |||||
3282160 | 1290 | 2790 | 300 | 460 | 118 | 4 | 418 | 1200 | 1500 | 77.9 | |||||
31821/600 | 4050 | 9850 | 600 | 870 | 200 | 6 | 805 | 600 | 800 | 384 | |||||
32821/600K | 4050 | 9850 | 600 | 870 | 200 | 6 | 805 | 600 | 800 | 403 | |||||
31821/630 | 4350 | 10600 | 630 | 920 | 212 | 7.5 | 850 | 550 | 750 | 438 | |||||
32821/630K | 4350 | 10600 | 630 | 920 | 212 | 7.5 | 850 | 550 | 750 | 460 | |||||
NN3030K | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 4000 | 3400 | 7.7 | |||||
NN3030/YA8 | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 4000 | 3400 | 7.7 | |||||
NN3030 | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 3200 | 2400 | 7.75 | |||||
NN3030/C9 | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 3200 | 2400 | 7.75 | |||||
NN3030/C9YA8 | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 3200 | 2400 | 7.79 | |||||
NN3030K/C91W33 | 330 | 650 | 150 | 225 | 56 | 2.1 | 206 | 3200 | 2400 | 7.7 |
- 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:Why cylindrical roller bearings can not bear axial load?.
- The thrust bearing retainer plate and two pieces of circular hole of the ball and the ball hole and shaft wear in the park, circular plate, steel ball track between two plate, shaft and the bearing seat of the top plate in the round two sides, in addition to the track groove, it is not binding the radial direction, so it cannot withstand the radial load.The radial bearing by the size of the two steel ring, steel ball size between steel ring, steel ring diameter fixed by a bearing seat, shaft mounted on a small steel ring, binding only in the radial direction and axial direction of the load is not binding, so it cannot withstand the axial diameter.
- Q:What is called a semi convex roller, a fully convex roller, a logarithmic curve roller?
- What is called a semi convex roller, a fully convex roller, a logarithmic curve roller?Semi convex, convex roller is in plane roller axis, the outer surface of a continuous or discontinuous convex curved basic cylindrical or conical roller, to prevent the end of the roller and raceway contact stress concentration. The roller is generally defined as a convex roller and a modified roller.
- Q:Can cylindrical roller bearings bear high temperature?
- Bearing is not high temperature grease is not high temperature, a grease temperature does not exceed 120 degrees, high temperature will lead to bearing lubrication performance, unable to work, in fact, the bearing itself can be high temperature resistant.
- Q:Why does cylindrical roller bearings fail abnormally?
- 5, improper reinforcement of uranium bearing seat, so that the bearing capacity of the axle is uneven, the bearing seat is provided with holes, or some fasteners, such as a compression screw, etc., are supported, and the supporting parts are provided with grooves or printing places near the roller track of the cylindrical roller bearings.
- Q:Why are cylindrical roller bearings suitable for traveling support?
- Should be the inner ring and the outer ring without the edge of the can do moving support. Cylindrical roller bearings without inner sides of the inner ring or outer ring, whose inner and outer rings can be moved relative to the axial direction, so they can be used as free end bearings.
- Q:Rolling bearing face to face or back to back on the use of cylindrical roller bearing pairs, the speed limit will be reduced? Please, thank you!
- Rolling bearing face to face or back to back, the speed limit will be reduced? Yes, especially in order to obtain a large preload or a large gap of the matching. Cylindrical roller bearings in pairs, the limit speed will be reduced? Cylindrical roller bearings do not exist in pairs, one said that you can use the same internal and external diameter of double row, four column cylindrical bearings, the same internal and external diameter of double row, four column bearings, compared to single row cylindrical bearings limit speed will be reduced
- Q:Why should the main shaft be coupled with double row cylindrical roller bearings?
- Separable, easy to install and disassemble, mainly used in lathe, milling machine, machining center and other high-precision machine tool spindle. Hope to be of help to you.
- Q:Why are there no double row cylindrical roller bearings in the mechanical design manual?
- So under normal circumstances, the bearing bore and the shaft is no gap.But do you mean that the inner ring and the shaft of the bearing are fixed,
- Q:How to calculate the clearance of bearings, such as 23226 double row cylindrical roller bearings
- 3, the bearing clearance in different conditions: the bearing clearance can be changed under different conditions, in particular, can be divided into: 1) the original clearance: the original bearing clearance refers to the complete installation in front of the machine after the bearings, the clearance in a free state of the. In fact, the original clearance is not to be measured by measurement, so the original clearance is often replaced by a test clearance. The inspection is in clearance inspection status, applied in measuring load conditions, clearance data instruments detection and, strictly speaking with the original bearing clearance is not the same, but little difference in the readings on the two in general, so it can replace each other without causing much error. 2) effective clearance: effective clearance, or work clearance, refers to the bearing in the installation of the host, in a certain load, to a certain temperature rise in a stable state of operation, bearings exist in the actual clearance. Obviously, the effective clearance is smaller than the original clearance.And 4, bearing clearance: clearance of bearing is to ensure that the bearings are to operate flexibly without blocking, but also requires that can ensure the bearing running smoothly, the bearing axis has no significant settlement, and the number of rolling elements bear the load as much as possible. Therefore, the clearance of the bearing has a great influence on the dynamic performance of the bearing (noise, vibration and friction) and the rotation accuracy, and the carrying capacity (wear and fatigue) of the bearing.
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Double Row Cylindrical roller Bearings mill roll bearing bearings
- Loading Port:
- Shanghai
- Payment Terms:
- TT OR LC
- Min Order Qty:
- 1000 pc
- Supply Capability:
- 5000000 pc/month
OKorder Service Pledge
OKorder Financial Service
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