Tapered roller bearings are separable bearings. Both 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. Single row tapered roller bearings can bear radial load and single direction axial load. When the bearing bears radial load, it will produce an axial component force, so another bearing that can bear the axial force in the opposite direction is needed to balance it.
The ability of single-row tapered roller bearings to bear axial load depends on the contact angle, that is, the angle of the outer ring raceway. The greater the angle, the greater the axial load capacity. Tapered roller bearings use 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 machinery such as large-scale cold and hot rolling mills.
The angle of the outer ring and the diameter of the outer raceway have been standardized and the dimensions are the same. No changes are allowed during the design and manufacturing process. The outer ring of tapered roller bearings can be interchanged with internal parts worldwide.
Tapered roller bearings are mainly used for radial loads and radial loads. Compared with angular contact ball bearings, the bearing capacity is larger and the speed limit is lower. Tapered roller bearings can bear one-way axial load, thereby limiting the axial displacement of the shaft or housing in one direction.
Tapered roller bearings are mainly subjected to combined radial and axial loads. The bearing capacity of the bearing depends on the raceway angle of the outer ring. The greater the angle, the greater the bearing capacity. The bearings are separable bearings, divided into single-column, double-column and four-row tapered roller bearings. The clearance of single-row tapered roller bearings needs to be adjusted during installation; when the product leaves the factory, the clearances of double-row and four-row tapered roller bearings are carried out according to user requirements.
Tapered roller bearings have a tapered inner ring and an outer ring, and the tapered rollers are arranged in the middle. All the projection lines of the cone surface meet at the same point on the bearing shaft. This design makes tapered roller bearings particularly suitable for carrying composite materials (radial and axial). The axial bearing capacity of the bearing is mainly determined by the contact angle alpha; the greater the alpha, the higher the axial load. The calculation coefficient e is used to express the angle size; the larger the value of e, the larger the contact angle, and the stronger the applicability of the bearing to bear the shaft load.
Tapered roller bearings are usually separated, that is, the inner ring assembly of the roller and the inner ring of the retaining assembly can be separately installed on the tapered outer ring (outer ring).
Tapered roller bearings are widely used in industries such as automobiles, rolling mills, mining, metallurgy, and plastic machinery.