Duplex Paired Bearings

DUPLEX bearings consist of an assembly of two paired bearings which provides the following advantages:

  • radial displacement reduced to a minimum
  • increase of the radial and axial load capacity
  • accurate axial positioning with axial loads

WIB supplies DUPLEX bearings with the following configurations:

  • 0 arrangement called DB (back-to-back)
  • X arrangement called DF (face-to-face)

These assembly configurations are used for applications where no bearing clearance is allowed and where a high degree of system stiffness is required.

Pairing is achieved with bearings of identical tolerance classes and by applying an axial preload to the inner rings for the O arrangement and on the outer rings for the X arrangement. The inner or outer rings are undergo a separate grinding operation to align both side faces on the same plane with minimum clearance.

Paired bearings are packed two by two according to their arrangement (O or X). It is very important not to separate them while unpacking.

Duplex Paired Bearings

O ARRANGEMENT (BACK-TO-BACK)

The load lines converge outward along the bearing axis thus providing a greater abutment distance and consequently a great degree of system stiffness. The O arrangement accepts axial and radial loads acting in all directions.

preloading

X ARRANGEMENT (FACE-TO-FACE)

The load lines converge inward towards the bearing axis thus providing a shorter abutment distance and a lower angular stiffness of the whole assembly. The X arrangement is less sensitive to misalignments and accepts axial and radial loads in all directions.

The load lines converge inward towards the bearing axis thus providing a shorter abutment distance and a lower angular stiffness of the whole assembly. The X arrangement is less sensitive to misalignments and accepts axial and radial loads in all directions.

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