Self-aligning ball bearings are a type of rolling bearing with self-aligning functionality, consisting of an inner and outer ring, rolling elements (steel balls), and a cage (ball retainer). Unlike other types of rolling bearings, self-aligning ball bearings have a certain degree of self-aligning ability. When there is deviation or misalignment between the shaft and the bearing seat, they can withstand the deviation load by adjusting the balls and cage, ensuring the normal operation of the bearing. Self-aligning ball bearings have the characteristics of large load capacity, smooth rotation, and good wear resistance, and are widely used in the fields of metallurgical equipment, mining machinery, heavy machinery, water pumps, shipbuilding, petrochemical equipment, and others. Additionally, self-aligning ball bearings have advantages such as wear resistance, corrosion resistance, and smooth rotation, which can improve the reliability and service life of mechanical equipment.