KTR Sverige AB Ritarslangan 7 18766 Täby T: 08/625 02 90

RADEX®-N Composite

RADEX<sup>®</sup>-N Composite
  • light weight
  • backlash-free
  • torsionally rigid
  • radial assembly, service friendly
  • consider shaft distance
  • absorbs angular misalignment
  • absorbs radial misalignment
  • absorbs axial misalignment
  • 80 degree max. operating temperature
  • double-cardanic
  • maintenance-free
  • Atex

Product features

  • Coupling with spacer from carbon fiber (CFK)

  • For large shaft distance dimensions without additional bearing

  • All steel parts from stainless material

  • CFK-pipe glued with flanges and radially bolted in addition

  • Spacer sealed against environmental influences

  • On request with ATEX approval

The RADEX®-N is a backlash-free, torsionally-stiff and maintenance-free all-steel coupling. The lamina that are extremely rigid in sense of rotation are made from high-strength, stainless spring steel and enable a compensation for high displacements with low restoring forces. By reason of the all-steel design the RADEX®-N can be used in drives with temperatures of up to 280° C.

FEM-optimized laminae form

The steel laminae packings from stainless spring steel were developed on the basis of FEM calculations. Under consideration of the necessary possibilities of displacements of the coupling the optimal form regarding torque transmission and torsional rigidity was aimed for. The fitted form of the steel laminae at the outside diameter is the result of this optimization calculation.

Laminae packings with dowel screws

The „heart“ of the steel laminae coupling are the laminae packings and their connection to the hubs or spacers.

High-strength, special dowel screws that are alternately screwed with hubs and spacer enable a combination of frictional engagement and positive locking. Thus a high power density with simultaneous easy displacement and low restoring forces is guaranteed.

Due to the special constructive design of the RADEX®-N components the laminae packings are „artificially“ prestressed. Hereby the torsional rigidity of approx. 30 % is enabled and at the same time the known problem regarding the axial vibrations of the spacer is avoided.

ATEX standard

ATEX standard

This type are certified and confirmed according to directive 2014/34/EU as units of category 2G/2D and thus suitable for the use in hazardous areas of zone G1, G2, D21 and D22.

RADEX®-N steel lamina couplings (Laminae packings with dowel screws)

The "heart" of the steel laminae coupling are the laminae packings and their connection to the hubs or spacers.

High-strength, special dowel screws that are alternately screwed with hubs and spacer enable a combination of frictional engagement and positive locking. Thus a high power density with simultaneous easy displacement and low restoring forces is guaranteed.

Due to the special constructive design of the RADEX®-N components the laminae packings are "artificially" prestressed. Hereby the torsional rigidity of approx. 30 % is enabled and at the same time the known problem regarding the axial vibrations of the spacer is avoided.

General description

The RADEX®-N is a backlash-free, torsionally-stiff and maintenance-free all-steel coupling. By using CFK pipes considerably larger shaft distance dimensions are possible compared to comparable steel pipes. The dimensioning of CFK pipes is "custom-made" to the application and is optimally adjusted to the respective case of operation.

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