This bearing carries axial load in a single direction, seating against a spherical housing washer that lets the assembly self-align when the shaft or housing seat is not perfectly square. The 53215 deep groove ball bearing from FAG uses a steel sheet metal cage (JP type) to hold the balls in position. Height is 28.3 mm, net mass is 0.812 kg, limiting speed is rated at 3950 1/min and reference speed at 4300 1/min. Because load can only be transmitted from one side, mounting must ensure the axial force always acts in the intended direction; reversed or combined radial loading is not supported by this design. The spherical seating washer compensates for angular misalignment between the shaft and housing, preventing edge stress on the raceway under slight deflection. The steel cage keeps ball spacing stable up to the stated speed limits, without adding radial guidance capability.