Tapered roller bearings are separable bearings, bearing inner and outer rings have conical raceway. The bearing can be divided into single row, double row and four row tapered roller bearings according to the number of rollers installed. Single row tapered roller bearings can withstand radial loads and uniaxial axial loads. When bearings are subjected to radial loads, there will be an axial component, so another bearing that can withstand the reverse axial force is needed to balance it. It widely used in automobiles, rolling mills, mines, metallurgy, plastics machinery and other industries.