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


POLY-NORM<sup>®</sup> ADR-SB
  • 80 degree max. operating temperature
  • Atex
  • absorbs axial misalignment
  • absorbs radial misalignment
  • absorbs angular misalignment
  • torsionally elastic
  • relatively short shaft distance
  • torsionally dampening
  • maintenance-free

Product features

  • For braking calipers as brake to stop

  • Elastomer ring in built-in condition changeable

  • Axially plug-in, easy assembly

  • Maintenance-free

  • Short-constructing – small dimension of shaft distance

  • Torques from 40 to 5,500 Nm

The POLY-NORM® coupling is a torsionally-flexible, shear type shaft coupling. It has an axial plug-in design with a unique short overall length. The POLY-NORM® can be used in nearly all types of machinery and is ideal for the pump industry.


The coupling consists of two hubs, with fingers separated by elastomeric elements. The hubs are assembled blindly plugging the hub fingers into each other axially and the elastomer ring is trapped in a groove between both coupling hubs. The compact POLY-NORM® coupling transmits torque with the elastomer in compression.

Shaft misalignments, vibrations and shock loads are effectively absorbed by the POLYNORM ®.

The coupling is maintenance-free and used in general machinery, the pump industry and in compressors. Torques of up to 134,000 Nm are stocked in 22 different sizes and 7 designs. In addition to the standard coupling models, flange drop out center and spacer options are available in many variations. 

Variation of options

The coupling can be adapted to many applications due to the many options that are possible with the building block arrangement. The POLY-NORM® components of a given model can be mixed and matched with each other to obtain different shaft distances using the same basic component.

On request, we can provide customized variations of the POLY-NORM® to fit your needs – for example, our POLY-NORM® overload coupling with RUFLEX® torque limiter. Just ask us! 

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.