A wheel bearing is a simple device made up of two main components, the bearing itself and the race. The bearing itself consists of a metal housing that is pressed over a row of ball bearings that circle the metal housing. These ball bearings in turn ride on the race, which is a very smooth metal surface. When a wheel is rolling, the action of the ball bearings rolling against the surface of the hub that allows the wheel to spin smoothly. wheel Hub Bearing DAC25520037

   To adopt the structure of double row inner rings, the angle which fills the ball is bigger than others, the auto wheel hub bearings can bear beavier axial and radial load. It is no need to adjust the inner clearance because it is already preserved inmaking. It was filled with Iubricating grease in high quality in the inner bearing, which could make the assemblage and usage easily. The range of the diameter of the inner ring is from 20 to 80mm and that of the outer ring is from 40 to 120mm. Now there are more than 300 kinds of this bearings. .