This needle roller cage assembly guides a single row of needle rollers within a JN-type cage, transmitting radial load directly through the shaft and housing bore that form the raceways. Width is 30.0 mm and net mass is 72.5 g. The permissible limiting speed reaches 8500 1/min, with a reference speed of 4950 1/min. Since the assembly has no integral inner or outer ring, it requires a hardened and ground shaft and housing seat to serve as running surfaces, which keeps radial section height to a minimum where space is limited. The cage design maintains even roller spacing and reduces friction between rollers, supporting smooth operation up to the stated speed limits. Lubrication and sealing must be provided externally, as the cage assembly itself carries neither.