This needle roller cage assembly guides a single row of needle rollers within a housing bore, using its own cage (JN) to keep the rollers evenly spaced without an integral inner or outer ring. Width is 13.0 mm and net mass is 8.82 g. The limiting speed is 21800 1/min, with a reference speed of 13500 1/min. The absence of built-in rings means the assembly relies on the shaft and housing surfaces to form the raceways, so mounting requires a shaft and bore machined to the correct running accuracy and surface finish. This design keeps radial space minimal while maintaining roller alignment, and the speed ratings allow operation up to the stated limiting and reference values under adequate lubrication.