This needle roller cage assembly transmits radial load through a single row of needle rollers held in a JN cage, without an integral inner or outer ring, resulting in a compact radial section. Width is 17.0 mm and net mass is 10.8 g. The design supports a limiting speed of 22400 1/min and a reference speed of 13900 1/min. Since the cage assembly has no rings, it must run directly against a hardened and ground shaft and housing bore that form the raceways, allowing a reduced radial envelope where housing space is limited. The open design requires external sealing and lubrication to be provided by the surrounding construction, and the JN cage guides the needle rollers to maintain even spacing and smooth rotation up to the stated speed limits.