This component serves as a separate cylindrical inner ring designed to be mounted on a shaft as part of a needle roller bearing assembly. It has a bore diameter of 20.0 mm, a width of 20.0 mm, and a net mass of 26.8 g. The cylindrical form allows precise seating on the shaft and provides a hardened running surface for the rolling elements. Being supplied as a separate ring, it allows the shaft-side raceway to be selected independently from the outer bearing component, which is useful when the shaft itself is not hardened or ground to raceway quality. Correct fit on the shaft is required to maintain the intended internal clearance and running accuracy of the assembled bearing.