They can be combined with drawn cup needle roller bearings with open ends, drawn cup needle roller bearings with closed ends and needle roller bearings. Axial needle roller bearingsĪxial needle roller bearings are construction units consisting of axial needle roller and cage assembles and thrust bearing washers with centering spigots. These washers are suitable for use where the adjacent machine part is unhardened but is sufficiently rigid and geometrically accurate. Axial bearing washersĪxial bearing washers are punched, through-hardened, polished and suitable for use as shaft or housing locating washers. Axial needle roller and cage assemblies require hardened and ground running surfaces as a raceway. Radial loads must be supported by separate means. They support high axial forces in one direction. They are thus suitable for applications that allow larger width tolerances and less demanding requirements for axial runout.Īxial needle roller and cage assemblies consist of plastic or metal axial cages with integrated needle rollers and have a very low axial installation height. These rings have larger tolerances than the IR rings. The end faces are turned and the edges are broken.
Inner rings are available with and without a lubrication hole. Chamfers on the end faces allow easy insertion into the bearing and prevent damage to the seal lips of the bearing. IR inner rings have a precision machined raceway. Roller bearings have a thinner profile and larger contact area than ball bearings, making them stronger and more space-efficient than ball bearings. Optimum running surfaces are required for seal lips.Needle roller bearings must be combined with wider inner rings in order to allow larger axial displacements of the shaft in relation to the housing.The shaft cannot be used as a raceway for needle roller and cage assemblies, drawn cup needle roller bearings with open ends or with closed ends and needle roller bearings.Inner rings are made from hardened rolling bearing steel and have precision machined or ground raceways.
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