Metric Inner Rings
Inner rings are made from hardened rolling bearing steel and have precision machined or ground raceways. They are used where: the shaft cannot be used as a raceway with needle roller and cage assemblies, needle roller bearings must be combined with wider inner rings in order to facilitate axial displacement of the shaft in relation to the housingdrawn cup needle roller bearings with open ends, drawn cup needle roller bearings with closed end and needle roller bearings, optimum running surfaces are required for the seal lips.