Tapered Roller Bearings can carry combinations of large radial and thrust loads. The axial load carrying capacity of the bearings is largely determined by the contact angle. The larger the angle, the higher the axial load capacity. This type of bearings belongs to separable bearing, according to the number of rolling rows, they can be classified into single-row tapered roller bearing, double-row tapered roller bearing, and four- row tapered roller bearing.