This needle roller cage assembly carries a single row of needle rollers positioned by a JN cage, with a width of 13.0 mm and a net mass of 8.0 g. The limiting speed is rated at 22400 1/min, while the reference speed reaches 14200 1/min, indicating the thermal and mechanical limits under which the assembly can operate. Since it consists of rollers and cage only, without an integral inner or outer ring, this needle roller cage assembly requires a hardened and ground shaft and housing bore to serve as raceways. The cage design keeps the rollers evenly spaced and guided, reducing friction and allowing the compact radial section to handle radial loads efficiently where a minimal cross-section is required.