Tapered ball bearings consist of the tapered inner and outer ring raceways and tapered rollers. The features make them suitable to bear the radial and axial loads. The capacity of axial loads are decided by the angleα. The larger degree of the angle, the higher capacity of the axial load. The inner component with inner ring, the ball and cage are able to separated from the outer ring. They are classified according to rows of the roller, such as single, double and four row bearings. You need adjust the clearance to your requirement if the single ones are fixed. But it is not necessary to do so for other types because the clearance is operated rightly in the factory.