Tapered roller bearings outer ring raceway having tapered raceways, fitted between the tapered roller. If the tapered surface extends, will eventually converge to a point on the bearing axis. This type of bearing is mainly used to bear radial load, axial joint. The axial load capacity by exposure to alpha, i.e the outer ring raceway angle, alpha angle increases, the greater the axial bearing capacity. Tapered roller bearings for the separation bearing, the inner ring with roller and cage formed within the component, outer component, both inside and outside the assembly can be mounted, division. According to the rolling body alignment, can make this kind of bearings single row, double row and divided into multiple columns.