This inner ring is a separate cylindrical component designed to be mounted on the shaft as part of a needle roller bearing assembly, providing the inner running surface for the rolling elements. The bore diameter is 160.0 mm and the width is 40.0 mm, with a net mass of 1.199 kg. The cylindrical form allows a precise fit on the shaft seat, ensuring correct radial support for the rolling elements it works with. Being supplied as a separate ring, it allows the shaft-side raceway to be selected and replaced independently of the outer bearing components, which simplifies assembly and maintenance where the inner ring surface is subject to wear. As no lubrication, sealing, or clearance data are given, mounting and lubrication practice should follow the requirements of the complete bearing assembly this ring is fitted into.