This inner ring provides the raceway surface for needle roller and cage assemblies, allowing a full-complement needle roller bearing to be built up directly on a shaft. It has a bore diameter of 70.0 mm, a width of 25.0 mm, and a net mass of 0.22 kg, matching the XL series dimensional line for cylindrical inner rings. The cylindrical bore allows a simple slide fit onto the shaft, letting the ring rotate together with the shaft while the needle rollers run on its hardened surface. Since it is supplied as a separate component, the raceway diameter and width can be matched precisely to the mating needle roller and cage assembly, giving the assembler control over internal clearance and axial arrangement in the bearing position.