What is a common feature of double-row self-aligning ball bearings?

• A. Ability to handle axial loads only
• B. Ability to self-align for misaligned shafts
• C. Ability to accommodate only radial loads
• D. Best suited for high-speed applications

Answer: (B)

Double-row self-aligning ball bearings are designed with two rows of balls and a spherical outer raceway. This configuration allows them to compensate for misalignments between the shaft and the housing. When there is a misalignment—due to factors like installation errors or deflection under load—these bearings can pivot around the center of the outer ring. This self-alignment feature is crucial in applications where perfect alignment cannot be guaranteed, substantially extending the bearing's life and reliability.

The other features mentioned in the options do not accurately describe the capabilities of double-row self-aligning ball bearings. While they do handle both radial and some axial loads, they are particularly noted for their misalignment compensation rather than being tailored solely for one load type or high-speed applications.