The tapered roller bearing is a separable bearing. The angle of the outer ring and the diameter of the outer raceway have been standardized as the outer dimensions. It is not allowed to change during design and manufacturing. As a result, the outer ring and inner assembly of the tapered roller bearing can be interchanged worldwide.
Tapered roller bearings are mainly used to bear combined radial and axial loads, mainly radial loads. Compared with angular contact ball bearings, the bearing capacity is large and the limit speed is low. Tapered roller bearings can bear axial load in one direction and can limit axial displacement of the shaft or housing in one direction.
The single row tapered roller bearing has an outer ring, its inner ring and a set of tapered rollers are enclosed by a basket-shaped 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 outline dimension standard, the outer ring or inner ring assembly of any standard type of tapered roller bearing should be able to achieve internationality with the outer ring or inner ring assembly of the same model. exchange.
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. Bearings with large taper angles are coded with B in the rear, and the taper angle is between 25° and 29°, which can bear larger axial loads. In addition, single-row tapered roller bearings can adjust the size of the clearance during the installation process.
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. The performance of this type of bearing is basically the same as that of double-row tapered roller bearings, but it bears greater radial load than double-row tapered roller bearings and has a slightly lower limit speed. It is mainly used for heavy machinery.