For self-aligning ball bearings, the center of the rolling surface of the outer ring is consistent with the center of the bearing, which is spherical, and the inner ring is a double-row raceway. The steel ball, cage, and inner ring can rotate freely with a certain degree of inclination relative to the outer ring. Therefore, it is possible to automatically adjust the eccentricity of the shaft and the bearing housing due to machining errors, poor installation, and the like. However, due to the small axial load capacity, it is not suitable for applications with large axial loads. In addition, if the bearing is installed on the tapered shaft with a tightening bushing, the installation and disassembly are easier, so it is mostly used in the drive shaft.
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