This needle roller cage assembly guides a single row of needle rollers within a width of 13.0 mm, keeping them evenly spaced and correctly aligned in the housing bore and on the shaft. The cage, designated JN, is made for a net mass of 14.4 g, and the assembly is rated for a limiting speed of 14200 1/min and a reference speed of 8100 1/min. Symbol: K32X37X13-B/0-7. Because the design consists of rollers held by a cage without integrated inner or outer rings, it requires hardened and ground shaft and housing raceway surfaces to form the complete bearing arrangement. This construction allows a thin radial section while maintaining full roller complement contact, which supports high radial load capacity relative to the available space. The permitted speed values indicate the operating limits under which the cage assembly maintains proper roller guidance and lubrication film formation.