duplex pairs and axial preloading

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Duplex Pairs

Duplex bearings are a pair of angular contact RBC Thin Section Ball Bearings specially ground for use as a matched set. A duplexed pair can be used to provide accurate shaft location, to increase capacity or to increase stiffness of the bearing assembly. A duplex pair of RBC Thin Section Ball Bearings is ground so that when mounted using recommended fits, there will be no internal clearance in the bearings. There are three basic mounting methods to accommodate different loading requirements:

  • Back-to-Back (DB) B-Type
  • Face-to-Face (DF) F-Type
  • Tandem (DT), T-Type

Back-to-Back, DB

  • Heavy radial loads
  • Combined thrust & radial loads
  • Reversing thrust load
  • Excellent rigidity
  • Moment loads