Bearing 54318 carries axial loads acting from both directions, combining two thrust bearing units with a common spherical housing washer that allows self-alignment under misalignment between the shaft and housing seats. The design height is 97.2 mm, net mass 6.68 kg, limiting speed 2240 1/min and reference speed 3900 1/min. The rolling elements are guided by a steel sheet metal cage, symbol JP. This double direction deep groove ball bearing suits mounting positions where axial load changes direction and where the spherical seating surface must compensate for angular deviation of the housing washer, reducing edge loading on the raceways. The steel sheet metal cage keeps the assembly light while maintaining ball spacing at the given speed range; no sealing or integrated lubrication is specified, so lubricant supply and protection from contamination have to be arranged separately at installation.