Single row tapered roller bearing

Tapered roller bearings are separable bearings, with both the inner and outer rings having tapered raceways. These bearings are classified into single-row, double-row, and four-row tapered roller bearings based on the number of rows of rollers. Single-row tapered roller bearings can withstand radial loads and axial loads in a single direction. When the bearing is under radial load, an axial component force will be generated, so another bearing capable of withstanding the opposite axial force is needed to balance it.

Tapered roller bearings are radial thrust rolling bearings with tapered rollers as rolling elements. They come in two types: small taper angle and large taper angle. Small taper angle bearings primarily bear combined radial and axial loads, with radial loads being dominant. They are often used in pairs, installed in opposite directions, and the inner and outer rings can be installed separately. Radial and axial clearances can be adjusted during installation and use. Large taper angle bearings primarily bear combined axial and radial loads, with axial loads being dominant. They are generally not used alone to bear pure axial loads, but when paired (with the same-name ends facing each other), they can be used to bear pure radial loads.

The axial load capacity of a single-row tapered roller bearing depends on its contact angle, specifically the raceway angle of the outer ring. A larger angle results in a greater axial load capacity. Single-row tapered roller bearings are the most commonly used type. Small-sized double-row tapered roller bearings are used in the front wheel hubs of automobiles. Four-row tapered roller bearings are used in heavy machinery such as large cold and hot rolling mills.

Tapered roller bearings primarily bear combined radial and axial loads, with radial bearings being the dominant characteristic. The bearing’s load capacity depends on the raceway angle of the outer ring; a larger angle results in a greater load capacity. These bearings are separable bearings, classified as single-row, double-row, and four-row tapered roller bearings based on the number of rows of rolling elements. The clearance of single-row tapered roller bearings needs to be adjusted by the user during installation; the clearance of double-row and four-row tapered roller bearings is specified by the user at the factory and does not require adjustment.

Tapered roller bearings have tapered inner and outer ring raceways, with tapered rollers arranged between them. The projection lines of all the tapered surfaces converge at the same point on the bearing axis. This design makes tapered roller bearings particularly suitable for bearing combined (radial and axial) loads. The axial load capacity of a bearing is largely determined by the contact angle α; the larger the α angle, the higher the axial load capacity. The angle is represented by a calculation factor e; the larger the e value, the larger the contact angle, and the greater the bearing’s suitability for axial loads.

Tapered roller bearings are typically separable, meaning the tapered inner ring assembly, consisting of the inner ring with rollers and a cage, can be installed separately from the tapered outer ring.

Tapered roller bearings are widely used in the automotive, rolling mill, mining, metallurgical, and plastics machinery industries.