Pairing, single row tapered roller bearings, single row tapered roller bearing, double row tapered roller bearings, four row circular cone roller bearings. Design features have a conical taper roller bearing inner ring and outer ring raceway, the tapered roller are arranged in between. All the projection line on the surface of the cone axis in bearing the same points together. This design makes the tapered roller bearing is especially suitable for composite under radial and axial load. Bearing axial load capacity is mostly determined by the contact Angle alpha; Alpha Angle, the greater the axial load capacity is higher. Angle size by calculating coefficient of e; E value, the greater the contact Angle, the greater the bearing axial load of the greater applicability.