Aligning roller bearing with two rows of rollers, the main bearingRadial loadAt the same time can withstand either directionaxialLoad. Has high radial load capacity, especially suitable for heavy load or vibration load, but can not withstand pureAxial load. The raceway of the outer ring of this kind of bearing is spherical, so its centering performance is good and can compensatealignmentError.
There are two columnssymmetricalSpherical roller, the outer ring has a common spherical raceway, the inner ring has two raceway and bearing axis tilt an Angle, with good centering performance, when the shaft force bending or installation of different bearings bearings can still be used normally, centering with the bearingSize seriesDifferent, generally allowed to adjust the Angle of 1 to 2.5 degrees, the type of bearingsloadLarger capacity, in addition to the bearing can bear radial load can also bear the axial load of two-way action, has a good impact resistance, generally speaking, roller bearings in the center of the allowedWork speedIs low.
Aligning roller bearing according to the shape of the roller section is divided into symmetrical spherical roller andasymmetricTwo different structures of the shaped spherical roller, asymmetric aligning roller bearing is an early product, currently mainly for the maintenance service of the main machine, the new design of the main machine is rarely selected symmetric aligning rollerbearing, the internal structure after comprehensive improvement design andParameter optimization, compared with the early production of spherical roller bearings, able to bear a greater axial load, the bearing operating temperature is low, so it can adapt to the requirement of high speed, according to the inner ring with or without rim and retainers used different could be divided into two kinds of type C and CA, C type bearing inner ring is the feature of no guard and USES the steel plate stamping cage, Ryan, bearing the characteristics of the CA model prefers to inner ring on both sides have a guard and useCar systemThe solid retainer may be provided to the user with an outer ring to improve the lubrication of the bearingtankAnd threeOil holeSpherical roller bearing, expressed as a rear bearing code/W33, according to the requirement of the user can also supply with spherical roller bearing inner ring oil hole, in order to facilitate customer handling and replace bearings, also can provide inner hole of bearing, spherical roller bearing with taper cone hole taper 1:12 for later nicknamed K said, in order to adapt to the requirement of special user could also provide inner hole taper bearings for 1:30, then buy code-named K30 inner hole of the tapered bearings availableLock nutInstall the bearing directly in the conejournalThe bearing can also be mounted on the cylindrical journal by means of a set sleeve or a return sleeve. In order to ensure that the bearing can avoid harmful slip between the raceway and the roller due to centrifugal action during high-speed operation, the bearing should bear a certain minimum radial load, which can be estimated according to the following formula:
Fr = 0.02 C
Type in the
Fr -- minimum radial load N
C -- basic rated dynamic load N of the bearing
Equivalent dynamic load
P=Fr+Y1Fa when Fa over Fr e
P=0.67Fr+Y2Fa when Fa/Fr e
Type in the
P - equivalent dynamic load N
Y1, Y2 -- axial motionLoad factor
Equivalent static load
P0 = Fr + Y0Fa
Type in the
P0 - equivalent static load N
Y0 - axial static load coefficient

Aligning roller bearings are divided into cylindrical inner hole and conical inner hole.The taper of the cone inner hole is 1:12 for the rear aligning roller bearing (type 153000 or type 113000) and 1:30 for the rear aligning roller bearing (type K30). When the bearing is matched with a conical shaft, the radial clearance of the bearing can be adjusted by the movement of the inner ring along the axis.

The tapered hole centering roller bearings with the rear codes of K and K30 are installed on the matching compact sleeve to become the rear codes of K+H type and K30+H type bearings. Such bearings can be mounted withoutshoulderIs suitable for applications where bearings need to be mounted and dismounted frequently. In order to improve the bearing lubrication performance, the bearing outer ring car has a ring oil groove and drillingUniform distributionOf the three oil holes, the rear designation is W33.
Specific classification and model comparison:
1. Aligning roller bearing (type 20000 CC) 
2. Tapered hole centering roller bearing (type 20000 CCK) 
3. Aligning roller bearing (type 20000 CC/W33) 
4. Tapered hole centering roller bearing (type 20000 CCK/W33) 
5. Hole centering roller bearing (type 20000 CCK+H0000) mounted on a compact sleeve
6. Hole centering roller bearing (type 20000 CCK/W33+H0000)

Example: NTN LH series self-aligning roller bearings
The application of self-aligning bearings is increasing, especially for long life bearings under high temperature environment. For different applications, NTN engineers have developed STJ2 steel, which can be extended from room temperature to 250 ° c in a wide range of temperaturesThe service life of the. This steel is the standard material for LH series automatic aligning roller bearings. The characteristics of this bearing are as follows (compared with SUJ2) : long life bearing with large temperature range, 3.5 times the life of ordinary material at room temperature, 30 times the life of ordinary material at high temperature (250℃), preventing surface damage, 7 times the anti-spalling ability, 1.4 times the anti-abrasion ability, 2.5 times the anti-wear ability under high temperatureDimensional stabilityAt 250℃, almost no dimensional change, strengthen the strength of fracture fatigue, in the case of high temperature and tight coordination, increase the life of fracture fatigue by 2 times. Increase the strength of crack fatigue by 2 times, simplify parts storageManagement program, from room temperature to 250℃ can be used a single standard bearing model, automatic centering roller bearings will be gradually converted into \"LH series \".

Main applicable cages: stamping steel cage (suffix E), glass fiber reinforced polyamide 66 cage (suffix TVPB), machined brass solid cage (suffix M), stamping steel cage for vibration occasions (suffix JPA)
Main USES:Papermaking machinery, deceleration device,Railway vehicleAxle, rolling mill gear box bearing seat, rolling mill roll, crusher, vibrating screen, printing machinery, woodworking machinery, all kinds of industrial reducer, vertical belt seat centering bearing.

A bearing with a drum roller is arranged between an inner ring with two raceway and an outer ring with a spherical raceway. Outer raceway surfaceCenter of curvatureWith the bearing center consistent, so have with automaticAligning ball bearingSame tuning function. When the shaft and housing appear to bend, the load and axial load in two directions can be automatically adjusted. Large radial load capacity, suitable for heavy load,Impact loadIn the case. The inner diameter of the inner ring is the bearing of taper hole, which can be installed directly. Or use a set - up sleeve, remove the barrel to install incylindricalOn the shaft. The cage is made of steel plate stamping cage, polyamide forming cage and copper alloy. 
For self-aligning bearings, the use of an intermediate mounting ring prevents the outer ring from tilting and rotating when the shaft bearing is loaded into the box shaft hole. It should be remembered that some sizes of self-aligning ball bearings have balls protruding from the side of the bearing, so the middle mounting ring should be recessed to prevent ball damage. A large number of bearings are generally installed by mechanical or hydraulic pressure method.
For separable bearings, the inner ring and the outer ring can be installed separately, which simplifies the installation process, especially when both inner and outer rings are requiredinterferenceThis is especially true in coordination. The shaft with the inner ring installed in place is loaded with the outer ringBearing boxWhen, it is necessary to check whether the inner and outer rings are aligned correctly to avoid scratching the raceway and rolling parts of the bearing. If the cylinder andNeedle roller bearingInstallation sleeve is recommended when the inner ring without flange retaining edge is used or one side of the inner ring with flange edge is used. The outer diameter of the sleeve shall be equal to the inner raceway diameter F, and the tolerance standard for machining shall be d10.Punch the outer ring needle roller bearingIt is best to install with a mandrel.

Distinguish the quality of equipment bearings, we usually from the following aspects

Is the outer packing clear Double rowTapered roller bearingIn general, normal manufacturers have their own special designers to design external packaging for their brands, and arrange factories with qualified production conditions for production. Therefore, the packaging of products should be very clear no matter from the lines to the color blocks.unequivocally。

Whether the stenciled words are clear

Each bearing product will be printed on the bearing product body its brand, label, etc. Although the font is very small, but the normal manufacturers of the products are using the stenciling technology to print, and before the overheating process before the embossing, so its font is small, but deep concave, very clear. And in general,Counterfeit productsThe font is not only blurred, due to the printing technology is rough, the font is floating on the surface, and some can even be easily wiped away by hand or manual traces of serious.

Is there any noise

The left hand holds the bearing body sleeve, and the right hand reciprocates with a small amplitude to rotate the jacket, listening to whether there is noise during the bearing operation. Due to the backward production conditions of most counterfeit products, completely manual workshop-style operation inThe production processIn the bearing body will inevitably be mixed with dust, sand and other impurities, so when the bearing rotation will appear noise or operation is not smooth. This is the key to determining whether a product comes from a brand of a legitimate manufacturer that has strict production standards and operates on machines.

Whether there are muddy oil stains on the surface

Whether there is a muddy oil stain on the surface, we should pay special attention to it when buying imported bearings. Due to the gap between domestic anti-rust technology and foreign advanced manufacturing countries, it is easy to leave a thick oil stain when the bearing body is anti-rust treatment, and feel sticky when touching with hands, while abroadImported fromYou can hardly see any trace of anti-rust oil on the bearings. According to the introduction of the industry, special careful people can smell a special smell on the imported bearings, this is the smell of anti-rust oil.

Whether the chamfering is uniform

The so-called bearing chamfering, that is, the junction between the horizontal and vertical surface, the counterfeit bearing products due to the limitations of production technology, in these corners of the parts are not satisfactory, this we can easily identify.

Bearing the packing

The inner packing and outer packing bearings shall be cleaned and rust-proof after manufacturing and inspection, and then put into the inner packing, so as to achieve the purpose of waterproof, moisture-proof, dustproof, shock-proof, maintenance of the quality and accuracy of the bearings, as well as the convenience of use and sale.

The bearing inner packaging is divided into three categories according to the rust prevention period:

Short antirust packaging: antirust period of 3 to 6 months, suitable for large quantities of goods to the same subscriber, in a short period of time will be put into use bearings. According to the agreement of both parties, in order to facilitate the use of the principle, the use of simple packaging.

General antirust packaging: antirust period of one year, suitable for general purpose bearings.

(3) long anti-rust period packaging: two years of anti-rust period, suitable for special and precision bearings.

The inner packing materials of the bearing are polyethylene plastic cylinder (box), kraft paper, plain and corrugated polyethyleneComposite paper, paper box, polyethylene or polyethylene plastic film, nylon fastening belt or plastic fabric fastening belt, waterproof high-strength plastic belt, gunny bag, etc. All the above materials should be qualified in corrosion resistance test.