This inner ring is a separate component designed to be mounted on a shaft together with a matching needle roller bearing, providing the running surface required for needle rollers where the shaft itself is not hardened or ground to the necessary tolerance. It has a bore diameter of 50.0 mm, width of 22.0 mm, and a net mass of 0.113 kg. The cylindrical bore allows a standard fit onto the shaft without additional flanging features. Using this ring lets the bearing arrangement achieve the raceway hardness and surface finish needed for full needle roller load capacity while keeping the shaft as a simple turned part. It is intended for use alongside a corresponding needle roller bearing of matching bore and width, and should be selected together with the appropriate fit and lubrication method specified for that bearing.