Model Classification: Self-aligning single-direction type: 53000 series; Self-aligning double-direction type: 54000 series; Suffix U indicates the bearing is equipped with a self-aligning washer, requiring no spherical machining on the housing.

Appearance Characteristics: The outer side of the seat ring adopts a concave spherical surface, which is different from the flat seat ring of ordinary 51/52 series, and can realize self-alignment when matched with spherical washers.

Core Function: It only withstands axial force with no radial load capacity. It can compensate for assembly inclination and machining eccentricity to prevent eccentric wear and seizure of bearings.

Structure: Single-direction type: composed of shaft race, spherical seat ring, steel ball cage and self-aligning washer; Double-direction type: composed of middle shaft race, upper and lower spherical seat rings, two sets of steel balls and two self-aligning washers.