Transmits axial load in one direction only, with two washers and a ball-and-cage assembly separating them. Overall height is 12.0 mm, net mass 0.052 kg, cage type JP made of steel sheet metal. Limiting speed reaches 9700 1/min, reference speed 13200 1/min. Single-direction design means the bearing carries axial load from one side and must not be run under reverse thrust or combined radial load. It requires the shaft and housing to keep the assembly axially located and does not compensate for misalignment, so precise seating on both washers is needed. No integrated sealing is present, so lubrication and contamination protection must be provided externally, with grease or oil selected according to the actual speed and load conditions. Dimensionally and constructionally equivalent to SKF 51203, NSK 51203, and NTN 51203.