This inner ring provides the raceway component for needle roller bearings that use a separate cage and roller assembly without an integral inner race. It is a cylindrical inner ring with a bore diameter of 42.0 mm, a width of 30.0 mm, and a net mass of 0.079 kg, machined to run as the mating raceway surface for the corresponding roller and cage set. Since it is supplied as a standalone raceway ring, it is fitted onto a shaft to create the inner running surface where none is otherwise present, allowing the bearing arrangement to be built up from separate components matched to the shaft dimension of 42.0 mm. Selection depends on pairing it with the correct roller and cage assembly designed for this bore and width to achieve the intended fit and load path.