This component serves as the separate cylindrical inner ring, designed to be mounted on the shaft as part of a needle roller bearing assembly. It has a bore diameter of 70.0 mm, a width of 30.0 mm, and a net mass of 0.268 kg. The cylindrical bore allows for a straightforward fit onto the shaft seat without additional radial features. Being supplied as a separate ring, IR70X80X30-XL is intended for use where the inner ring is fitted independently from the outer bearing components, allowing the shaft-side element to be replaced or serviced without disturbing the housing fit. Its dimensional accuracy must match the corresponding needle roller and outer ring components to maintain correct internal clearance and running behavior.