This inner ring provides the shaft-side raceway for a needle roller bearing arrangement where the housing bore carries the outer race separately. It is cylindrical, with a bore diameter of 50.0 mm, width of 35.0 mm, and a net mass of 0.11 kg, mounted with an interference fit on the shaft. Using a separate inner ring of this type allows the shaft surface itself to avoid acting as the direct rolling contact, protecting it from wear and simplifying replacement of the raceway when needed. It suits assemblies designed for needle roller complements without an integral inner race, giving the designer control over radial internal clearance and fit selection independent of the shaft material and finish.