This needle roller cage assembly guides a single row of needle rollers within a JN-type cage, giving precise radial positioning without an integral inner or outer ring. Width is 24.0 mm and net mass is 0.154 kg. The limiting speed is rated at 4300 1/min, with a reference speed of 2850 1/min, defining the safe operating range for continuous rotation. Since the assembly has no rings of its own, it must run directly against a hardened and ground shaft and housing bore, which reduces radial section height and keeps the design compact. The cage construction (JN) provides accurate roller spacing and smooth guidance, making the assembly suitable where a low-friction, space-saving needle bearing arrangement is required and where the mating surfaces are already prepared to bearing-quality tolerances.