This needle roller cage assembly locates a set of needle rollers in a JN cage, providing a single-row rolling element arrangement without an integral inner or outer ring. Width is 17.0 mm and net mass is 17.0 g. The limiting speed is rated at 20900 1/min, with a reference speed of 11200 1/min. Since the assembly consists only of rollers and cage, it must run against a hardened and ground shaft and housing bore that act as the raceways, so mounting surfaces need to meet the required hardness and surface finish. The cage design keeps roller spacing uniform, supporting smooth rotation up to the stated speed values, and the compact radial section makes it suitable where axial space is limited and the surrounding components can serve as running surfaces.