This is a cylindrical inner ring designed to be mounted on a shaft as the inner raceway component for a needle roller bearing assembly without an integral inner ring. The bore diameter is 45.0 mm, width is 22.0 mm, and net mass is 89.5 g. The XL suffix denotes the extended-length version of this inner ring within the IR series. Since the component supplies a hardened, ground raceway surface on the shaft seat, it allows the use of separable needle roller bearings where the shaft itself does not provide sufficient hardness or surface finish for direct roller contact. Fitting this ring restores the ability to run needle rollers on a precision-ground surface, matching the bore diameter and width to the corresponding needle roller and outer ring components in the assembly.