This inner ring is a precision-machined component designed to be mounted on a shaft as the inner raceway for a needle roller bearing, manufactured to DIN 620. Bore diameter is 30.0 mm, width is 20.0 mm, and net mass is 64.3 g. The ring is fitted with a lubrication hole, allowing grease or oil to be supplied directly to the raceway during operation. Since this is a separate inner ring rather than a complete bearing unit, it is intended for use with a matching needle roller and cage assembly or a full complement bearing that runs directly on this hardened raceway. The precision machining ensures accurate fit and running accuracy on the shaft, while the lubrication hole supports continuous relubrication in applications where the bearing arrangement requires periodic grease or oil replenishment without disassembly.