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Tapered Roller Bearings

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definition:

The single-row tapered roller bearing's ability to withstand axial load depends on the contact angle, that is, the outer ring raceway angle. The larger the angle, the greater the axial load capacity. The most used tapered roller bearings are single-row tapered roller bearings. In the front wheel hub of the car, a small double-row tapered roller bearing is used. Four-row tapered roller bearings are used in heavy machines such as large cold and hot rolling mills.

 

Structural characteristicsedit:

The type code of tapered roller bearings is 30,000, and tapered roller bearings are separate bearings. In general, especially in the dimensions covered by GB / T307.1-94 "Tolerances for rolling bearings, radial bearings", the outer ring and inner components of the tapered roller bearing are 100% interchangeable.

 

The angle of the outer ring and the diameter of the outer raceway have been standardized as the same as the outer dimensions. No changes are allowed during design and manufacture. As a result, the outer ring and inner components of tapered roller bearings can be universally interchanged worldwide.

 

Tapered roller bearings are mainly used to support the combined radial and axial loads, mainly radial loads. Compared with angular contact ball bearings, the bearing capacity is large and the limiting speed is low. Tapered roller bearings can withstand axial loads in one direction and can limit axial displacement of the shaft or housing in one direction.

 

Category editor:

The single-row tapered roller bearing has an outer ring, an inner ring and a set of tapered rollers, which is an inner ring component formed by a basket-shaped cage. The outer ring can be separated from the inner ring component. According to the ISO standard for external dimensions of tapered roller bearings, the outer ring or inner ring component of any standard tapered roller bearing should be able to achieve internationality with the outer ring or inner ring component of the same model. exchange. That is to say, in addition to the outer dimensions and tolerances of the same type of outer ring must comply with ISO492 (GB307) regulations, the cone angle and cone diameter of the inner ring components must also meet the relevant regulations for interchange.

 

Generally, the tapered angle of the outer ring raceway of a single-row tapered roller bearing is 10 ° ~ 19 °, and it can simultaneously bear the combined action of axial load and radial load. The larger the cone angle, the greater the ability to withstand axial loads. Bearings with a large tapered angle, with a post code plus B, with a tapered angle between 25 ° and 29 °, can bear large axial loads. In addition, single-row tapered roller bearings can adjust the amount of clearance during installation.

 

The outer ring (or inner ring) of a double-row tapered roller bearing is a whole. The two small inner end faces of the inner ring (or outer ring) are close to each other and there is a spacer in the middle. The clearance is adjusted by the thickness of the spacer. The thickness of the spacer can also be used to adjust the pre-interference of the double-row tapered roller bearing.

 

Four-row tapered roller bearings, the performance of this kind of bearings is basically the same as double-row tapered roller bearings, but the radial load is greater than that of double-row tapered roller bearings, the limit speed is slightly lower, mainly used in heavy machinery, such as Rolling mill, etc.

 

Multi-sealed double and four-row tapered roller bearings, ZWZ provides long-life, multi-sealed double and four-row tapered roller bearings. The bearing is individually and completely new designed, and the traditional design method of fully sealed bearings is changed. A new type of sealing structure combining sealing and dustproof is adopted to improve the sealing effect and sealing performance. Compared with open structure bearings, multi-sealed double-row and four-row tapered roller bearings have a 20% to 40% longer life and a 80% reduction in lubricant consumption


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