Tapered roller bearings are usually divided into single-row tapered roller bearings, double-row tapered roller bearings, and four-row tapered roller bearings.
Generally, the tapered angle of the outer ring raceway of a single-row tapered roller bearing is between 10ºand 19º, which can bear the combined action of axial load and radial load at the same time. The larger the cone angle, the greater the load capacity to withstand axial load. Bearings with large taper angle, add B to the rear code, and the taper angle is between 25°~29°, which can bear larger axial load. In addition, single-row tapered roller bearings can adjust the size of the clearance during installation.
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 closely, with a bearing spacer in the middle. The clearance is adjusted by the thickness of the bearing spacer. The thickness of the bearing spacer can also be used to adjust the pre-interference of the double-row tapered roller bearing.
Four-row tapered roller bearings. The capability of this type of bearing is about 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.
