This component provides a single row of needle rollers guided by a JN cage, running directly on the shaft and housing bore as the raceways, so no inner or outer ring is included in the assembly. Width is 13.0 mm and net mass is 0.011 kg. The limiting speed is rated at 21800 1/min, with a reference speed of 12900 1/min, indicating the thermally safe continuous operating limit under normal lubrication conditions. Because the rollers and cage are separate from the raceways, this needle roller cage assembly requires the mating shaft and housing surfaces to be hardened and ground to the correct tolerance to serve as running tracks. This design keeps radial section height low while allowing high load density in the contact zone, and the cage guidance maintains roller spacing and alignment during rotation, reducing skewing at the rated speeds. Lubrication, whether grease or oil, must reach the rolling contact directly since there is no shield or seal integrated into the assembly.