Tapered roller bearings are separable bearings, consisting of inner ring, outer ring, cage and tapered rollers. Due to its design geometry, tapered roller bearings can withstand combined loads (axial and radial). In addition, this design allows rolling motion without the rollers sliding out of the tracks of the outer and inner rings. The contact angle of the tapered roller bearing on the rolling track is variable, which offsets the applied axial and radial load ratio respectively; the ability of the tapered roller bearing to withstand the angular misalignment of the inner ring relative to the outer ring is limited to a few Minutes of arc. Like other roller bearings, tapered roller bearings must bear the minimum load. The inner and outer rings of the bearing have tapered raceways. This type of bearing is divided into single row, double row and four row tapered roller bearings according to the number of rows installed.
Product classification and description:
Single row tapered roller bearing:
There is an outer ring, its inner ring and a set of tapered rollers are enclosed by a basket cage to form an inner ring assembly. The outer ring can be separated from the inner ring assembly. According to the ISO tapered roller bearing external dimension standard, any standard type of tapered roller bearing outer ring or inner ring assembly should be able to achieve internationality with the same type of outer ring or inner ring assembly exchange. That is, in addition to the external dimensions and tolerances of the outer ring of the same model, which must meet the requirements of ISO492 (GB307), the cone angle and component cone diameter of the inner ring components must also comply with the relevant provisions of interchange. Generally, the tapered angle of the outer ring raceway of a single-row tapered roller bearing is between 10° and 19°, which can bear the combined action of axial load and radial load at the same time. The larger the cone angle, the greater the ability to withstand axial load.
Double-row tapered roller bearing:
The outer ring (or inner ring) of a double-row tapered roller bearing is a whole. The small end faces of the two inner rings (or outer rings) are similar, 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:
Four-row tapered roller bearings. The performance of this type of bearing is basically the same as that of double-row tapered roller bearings, but the radial load is greater than that of double-row tapered roller bearings, and the limit speed is slightly lower. Mainly used for heavy machinery.
Tapered roller bearings use:
tapered roller bearings are widely used in automobiles, rolling mills, mining, metallurgy, plastic machinery and other industries.