Double row angular contact ball bearings consist of two sets of balls that make contact with raceways in the inner and outer rings, which are inclined relative to the axis of the bearing. This design enables the bearing to support larger radial loads and bidirectional axial loads. These bearings are typically suitable for applications that need to support combined loads, especially where there are high axial loads.

Features of double row angular contact ball bearings include:

• Loading Capacity: Due to the two sets of balls, they can usually support greater radial and bidirectional axial loads than single row angular contact ball bearings.
• Stiffness: The double row design provides higher rigidity, which is important for improving mechanical accuracy and bearing load shocks.
• Contact Angle: Double row angular contact ball bearings have different contact angles, commonly 25°, 30°, and 40°, to suit different performance requirements.
• Applications: Widely used in automotive hubs, high-speed spindles, plastic machinery, electric motors, pumps, and compressors, etc.
• Preload: Appropriate preload can adjust the rigidity and rotational accuracy of the bearing, which is especially important for high-precision applications.
• Installation: Proper positioning and control of preload are required during installation to ensure high performance.

Because double row angular contact ball bearings can support large loads in a relatively small space, they are very popular in industrial and automotive applications. During installation, it is usually necessary to pay attention to the fit and preload of the bearings to ensure their performance and lifespan. Maintenance and lubrication should also follow the manufacturer's guidance to keep the bearings in the best working condition.