This is a separate cylindrical inner ring for a needle roller bearing, designed for use with the corresponding outer ring and needle roller assembly. Bore diameter is 70.0 mm, width is 35.0 mm, and net mass is 312.0 g. The cylindrical bore allows direct mounting on a shaft without additional adapter sleeves. As a separable component, IR70X80X35-XL lets you replace the inner ring independently of the outer ring or roller cage, which simplifies maintenance when only one element shows wear. The plain cylindrical design has no built-in sealing or flanges, so shaft fit tolerance and lubrication must be selected according to the mating outer ring and application load conditions.