The primary function of a bearing is to enable the controlled transfer of loads and motion while minimizing friction and wear. Bearings achieve this through the use of rolling elements, such as balls or rollers, or through sliding surfaces, depending on the specific type of bearing. By doing so, bearings help to maintain the integrity and alignment of rotating shafts, axles, and other mechanical components, ensuring smooth and efficient operation of the machinery.

The angle of contact in angular contact ball bearings is carefully engineered to ensure that the bearing can effectively distribute and support the applied loads. By adjusting the angle of contact, the bearing can be optimized to handle varying degrees of radial and axial loads, providing versatility and adaptability for different applications.