Self-aligning roller bearings can adapt to the severe environment and working condition, are mainly designed to bear very heavy radial loads and heavy axial loads, have extremely high impact load resistance, and can realize full-capacity load through self-aligning functions thereof in the case that an installation axes are misaligned.

In outer rings of the bearings, two rows of rollers have a common spherical raceway. Thus, they can be automatically aligned in a wide range of swing angles and can accept axis alignment errors within a certain range.