Tapered roller bearings are separate bearings, bearing the inner and outer rings are tapered raceway. This type of bearing according to the number of rollers installed into single row, double row and four row tapered roller bearings and other different types of structures. Single row tapered roller bearings can withstand radial load and single direction axial load. When the bearing is subjected to a radial load, an axial force component will be generated, so when another bearing that can withstand the axial force in the opposite direction is required for balancing purposes.