This inner ring provides the cylindrical bore seat for a needle roller and cage assembly, replacing a hardened shaft where a full bearing seat cannot be machined directly. Bore diameter is 110.0 mm, width 30.0 mm, and net mass is 409.2 g. The XL cylindrical design gives a plain running surface for the rollers without additional flanging features. Fitting IR110X120X30-XL onto a shaft or spacer creates the correct inner race geometry, allowing the mating needle roller and cage unit to run with proper radial support. Since this component is a bare inner ring, it must be combined with a matching cage assembly and, where required, an outer ring or housing bore to complete the bearing arrangement. Handling and mounting should account for the netto mass given, and lubrication (grease or oil) should be selected according to the operating conditions of the complete assembly.