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Systems that use belts and chain drives, gears and gear drives, couplings, clutches and brakes, and other components.

POLY Coupling PKZ

Product Announcement from KTR Corporation

POLY Coupling PKZ-Image

Product characteristics

  • Not fail safe torsionally flexible shaft coupling, soft in bending   
  • On request with enlarged elastomer elements to reduce torsional backlash   
  • Axial plug-in - easy assembly - maintenance free   
  • Particularly small mounting length - for small shaft distance dimensions   
  • Operative range from - 40ºC to + 120ºC   
  • Compensation for axial, radial and angular shaft misalignments   
  • Use in general machinery
  • Explosion protection rated and confirmed acc. to EG Directive 94/0/EG


Coupling description

The POLY coupling is a torsionally flexible, shear shaft coupling for general machinery. It is assembled by axially pluging the hubs into each other and has excellent dampening characteristics. Its unique features are the flexible elastomeric elements that are located in both coupling halves.

The POLY advantage – A much greater number of flexible elements and thus a larger effective mass of the elastomer to accept vibration and to dissipate the heat caused by torsional vibrations when compared to similar competitive couplings with elements only in one half.


The coupling consists of 2 hubs with fingers that are separated by elastomeric elements which are assembled by axial blind plug-in to each other. Elastomer elements are placed into the slots of both coupling hubs. Torque is transmitted in a compact design. Shaft misalignments, vibrations and shock loads are effectively absorbed by the POLY coupling.

The coupling is maintenance-free and used in general machinery, the pump industry and in compressors. The Poly coupling handles torque ranges of up to 65,000 Nm and is stocked in 21 different sizes and 4 designs for immediate availability. In addition to our standard coupling models, a variety of flange, drop out center and spacer options are available.