This is a cylindrical inner ring designed as a separate component for needle roller bearing assemblies without an integrated inner ring. Bore diameter is 80.0 mm and width is 35.0 mm, with a net mass of 0.356 kg. The cylindrical bore allows mounting directly on a shaft without an inner ring of its own. Using this component lets the raceway surface run directly on the shaft, reducing radial space requirements compared to a full bearing with a built-in inner ring. It is suited for applications where the shaft itself does not provide a hardened, ground running surface and a separate hardened raceway is required for the needle rollers.