This needle roller bearing carries a machined inner ring, giving it a solid guiding surface for the needle roller and cage assembly. Bore diameter is 17.0 mm, outside diameter 29.0 mm, and width 16.0 mm, with a net mass of 42.65 g, corresponding to the light series NKI design. The bearing is fitted with a standard cage and rated for a limiting speed of 20600 1/min, with a reference speed of 11400 1/min. The solid inner ring construction allows for a compact radial section while maintaining full roller complement contact, which supports higher radial load capacity relative to the bearing envelope. The standard cage design guides the needle rollers evenly, keeping running accuracy consistent across the rated speed range. As an open bearing without integrated sealing, it requires external protection from contamination and a separate lubrication supply, typically grease or oil, matched to the operating speed and environment.