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Deep Groove Ball Bearings
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Needle Roller Bearings
Needle bearings with guide ribs without inner ring > Needle bearings with guide ribs with inner ring > Drawn cup needle roller bearings > Inner rings >
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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 for needle roller and cage assemblies, drawn cup needle roller bearings with open ends, drawn cup needle roller bearings with closed end and needle roller bearings
• 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
• optimum running surfaces are required for seal lips.

 

Download the current general catalogue EN

 

Table legend:

○ with lubrication hole

• with lubrication hole without counterbore

Catalogue
Additional information

Inner rings are suplllied in following designs:

  • Inner ring IR – normal accuracy, according to the DIN 620
  • Inner ring LR – with higher tolerances, see dimensional tables

 

Table legend:

○ with lubrication hole

• with lubrication hole without counterbore

Inner rings IR

Inner rings IR have a precision machined raceway. Chamfers on the end faces allow easy insertion into the bearing and prevent damage to the seal lips of the bearing.Inner rings are available with and without a lubrication hole.

Inner rings LR

Inner rings LR have a ground raceway. The end faces are turned and the edges are broken. These rings have larger tolerances than the rings IR. They are thus suitable for applications that allow larger width tolerances and less demanding requirements for axial runout.