This component is a separate cylindrical inner ring designed for use with needle roller bearings that require a separable inner raceway. It provides a hardened, ground raceway surface for the rolling elements, allowing the inner ring to be mounted independently on the shaft. The bore diameter is 30.0 mm, the width is 30.0 mm, and the net mass is 58.46 g. Because the ring is supplied as a separate component, the shaft seat itself does not need to be hardened and ground to full bearing raceway tolerances, since the IR30X35X30-XL takes over that function. This construction simplifies mounting and dismounting on the shaft and allows replacement of the raceway without replacing the whole bearing assembly. As a cylindrical version, it is intended for a plain cylindrical shaft seat rather than a tapered one.