This component is a separate cylindrical inner ring designed for needle roller bearing assemblies with a bore diameter of 12.0 mm and a width of 20.0 mm. Net mass is 14.6 g. The cylindrical bore and matching width allow it to be fitted as a replacement or additional inner race where the shaft itself is not hardened and ground to bearing tolerances. Using a separate inner ring lets the needle roller and cage assembly run on a defined raceway surface instead of directly on the shaft, which supports correct load distribution and reduces wear on the shaft surface. The XL execution corresponds to the extended inner ring range, matching needle roller and cage assemblies of the same bore and width dimensions for a complete bearing arrangement.