Carries axial loads in one direction only, with the raceway washers and ball-and-cage assembly forming a single-direction thrust arrangement. The cage is made of pressed steel sheet metal, designation JP. Overall height is 15.0 mm and net mass is 120.0 g. Limiting speed is rated at 7500 1/min, with a reference speed of 9800 1/min. This deep groove ball bearing 51205 is suited to shaft arrangements where load acts purely axially in a single direction, without any radial load-carrying requirement. Because it supports only one direction of thrust, correct axial location and preload during mounting are needed to keep the raceway washers properly seated. The steel sheet metal cage keeps the balls evenly spaced at the rated speeds given above. Dimensionally and constructionally equivalent to SKF 51205, NSK 51205, and NTN 51205.