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In summary, angular contact ball bearings are precision bearings designed to support combined radial and axial loads, provide high precision and rigidity, accommodate axial loads in one direction, operate at high speeds, and offer versatility for various industrial applications.

The angle of contact in angular contact ball bearings is a critical design parameter that influences the bearing's load-carrying capacity, precision, rigidity, and high-speed capability. It allows the bearing to operate efficiently under dynamic and oscillating loads, making it suitable for applications where precise motion control and accurate load distribution are essential.