What is the advantage of using double-row angular contact ball bearings?

The advantage of using double-row angular contact ball bearings primarily lies in their ability to accommodate axial loads in both directions, coupled with their capacity for handling higher loads compared to single-row designs. This unique feature is beneficial in applications where the bearing must support combined radial and axial loads, making it particularly useful in various machinery and equipment that experience dynamic forces.

Double-row angular contact ball bearings have two rows of balls, which allows for a larger contact area and the distribution of loads over more bearing material. This setup results in enhanced load-carrying capability and improved stability under varied operating conditions. The design facilitates better alignment under loading, which contributes to durability and less wear over time.

In contrast, while other options might address aspects of cost, maintenance, and weight, they do not specifically highlight the primary functional advantage that is critical for performance in demanding applications, which is the ability to manage both axial and radial loads effectively.