KTR Kupplungstechnik GmbH | Rodder Damm 170 | 48432 Rheine  | T +49-5971798-0 | F +49-5971798-698


Product features

  • Backlash-free, vibration-reducing jaw-type coupling
  • Axial plug-in
  • Maintenance-free
  • Electrically isolating
  • Failsafe
  • Torques from 0.2 to 5,850 Nm
  • Ambient temperatures from -50° C to +150° C possible (dependent on spider)
  • Couplings for machine tools, automation, power transmission, medical technology, packaging technology


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Sales Servo Couplings
T +49 (5971) 798-0
F +49 (5971) 798-698
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Engineering ROTEX® GS
T +49 (5971) 798-326
F +49 (5971) 798-6326
E info-rotex-gs@ktr.com

ROTEX® GS is a three-part coupling, backlash-free under pre-stress. The different hub designs and the different Shore hardnesses offer the optimal coupling for each application in automation engineering. In spite of its vibration-damping characteristics it is torsionally stiff so that it is not necessary to make any concessions to accuracy even with highly dynamic servo drives. The ROTEX GS works with the modular system; a high variety of different hub designs is available which can be combined within one coupling size.


Apart from the jaw-type geometry of the coupling hubs the zero backlash of the ROTEX GS is mainly due to the geometry of the ROTEX GS spiders. These are designed in a way that the convex teeth of the spider contact the concave jaws of the coupling hub under prestress. In combination with the straight toothing this results in a small surface pressure and an increased stiffness of the coupling system. 


The flexible spiders for the GS series are available in five different kinds of Shore hardness. The different kinds of Shore hardness allow to adjust ROTEX® GS easily to the individual conditions of an application with regard to torsional stiffness and vibration characteristics.

The flexible teeth are radially supported by a web on the inside diameter. In this way deformation caused by heavy acceleration or high speeds is prevented.

The permissible ambient temperature of the coupling depends on the Shore hardness of the spider.

Explosion-proof use

Explosion-proof use

This type is certified and confirmed according to EC standard 94/9/EC (ATEX 95) as unit of category 2G/2D and thus suitable for the use in hazardous areas of zone 1, 2, 21 and 22.

Please read through our information included in the respective Type Examination Certificate and the operating and mounting instructions.