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0 - 6,100 Nm

POLY PKD torsionally flexible, shear type shaft coupling

Three-part and compact shaft coupling

The torsionally flexible, shear type POLY PKD is a compact, three-part shaft coupling.

The three-part POLY PKD shaft coupling allows for the separation of driving and driven side without axial shifting.

The benefit is that the elastomers can be replaced when mounted. Apart from that driving and driven side can be radially assembled and disassembled.

  • Torsionally flexible, shear type shaft coupling
  • Short shaft distance dimension, radially separable
  • Elastomer elements can be replaced when mounted
  • Easy separation of driving and driven side
  • Radial assembly resp. disassembly of driving and driven side
  • Vibration-damping
  • Axial, radial, angular compensation
  • Axial plug-in
  • Maintenance-free
  • Complying with ATEX (acc. to EU directive 2014/34/EU)
  • UKEX compliant (according to UKEX Directive SI 2016:1107)
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The POLY shaft coupling is a torsionally flexible shaft coupling (safety coupling) for general engineering. It can be plugged in axially and is characterized by its excellent compensaion of vibrations.

Its special feature are flexible elements (packages) in both coupling halves. Thanks to the individual elements it has shear type properties interrupting the power transmission with overland or wear of elements.

The shaft coupling POLY is particularly compact. That is why it is suitable for small shaft distances.

Operation of shear type shaft couplings:

The shear type POLY shaft coupling has particularly short dimensions and consists of two hubs with cam and pocket elements positioned on the circumference on the face that are mounted by blind axial plug-in.

The individual elastomers clamp in the tailor-made free spaces of the coupling hubs transmitting the torque in this way.

With overload or wear of the elements the power transmission is interrupted and the shaft coupling (safety coupling) shears.

Component variation of shear type shaft couplings:

High adaptability with small variation by an optimally differentiated kit system. The POLY elements of one size can easily be combined with each other without problems. This allow to meet various shaft distances with the same basic component.

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


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