Tapered roller bearings are mainly used to withstand combined radial and axial loads with radial loads being dominant. Generally, they are not suitable for bearing axial loads alone. This type of bearing is designed so that the vertices of the conical surfaces of the inner raceway surface, the outer raceway surface and the rolling surface of the rollers intersect at a point on the center line of the bearing. In addition to metric series products, there are also a variety of imperial series products. It is suitable for withstanding heavy loads and shock loads. In addition to single-row bearings, tapered roller bearings also include double-row bearings, paired double-row bearings and four-row bearings. The cages of tapered roller bearings are generally stamped cages.