Engineering ROTEX® GS

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12.5 - 655 Nm

ROTEX® GS ZR3 backlash-free servo couplings

Cardan shaft with intermediate pipe made of aluminium variable in length

The double-cardanic ROTEX GS ZR3 is an intermediate shaft coupling (cardan shaft) with an intermediate pipe made of aluminium variable in length.

It is provided with half shell clamping hubs on both sides and can thus be mounted radially without displacing driving and driven components. The intermediate shaft of our cardan shaft is variable in length and allows for transmitting the torque over a large axial distance. Our range of half shell intermediate shaft couplings includes both frictionally engaged connections without feather keyway and positive-locking connections with feather keyway.

Typical applications of our cardan shaft ROTEX® GS ZR3 with an intermediate pipe made of aluminium variable in length:
Our intermediate pipe coupling is used wherever large shaft distances have to be bridged and where radial assembly/disassembly is necessary without displacing driving and driven side (easy assembly through our half shells).
The limits of application are defined by the operating speed and mounting length.

NEW: KTR has a new spider in its product range which decisively increases the performance level of the backlash-free servo couplings type ROTEX GS with regard to temperature resistance and pressure resistance. The material is a newly developed "thermoplastic polyurethane" with a hardness degree of "52 Shore D" and a temperature resistance of up to 120° C. The main areas of application are servo-hydraulics and test bench technology.

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  • Intermediate shaft coupling / cardan shaft with aluminium pipe bonded
  • Easy radial assembly of coupling by split coupling halves (half shells)
  • Replacement of spider without displacing driving and driven side
  • Lengths depend on speed and size, up to 4 metres can be realized without intermediate bearing
  • Low mass moment of inertia by use of aluminium
  • Radially dismountable, easy to service
  • Backlash-free
  • Torsionally flexible
  • Axial plug-in
  • Axial, radial, angular compensation
  • Vibration-damping
  • Maintenance-free
  • Double-cardanic
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Servo coupling general description:

Our servo couplings are torsionally stiff shaft couplings soft in bending serving as a connection element between drive unit and measuring sensor. They transmit the torque free from backlash and conformally, making our backlash-free shaft couplings highly accurate. They also allow for compensation of radial, axial and angular displacements. Thanks to the high variety of coupling types and hub designs we are able to supply the right coupling for almost every application.

Backlash-free properties of servo couplings:

Apart from the jaw geometry of the coupling hubs, the backlash-free properties of the ROTEX® GS backlash-free servo couplings (elastomer couplings) are mainly based on the geometry of the ROTEX® GS spiders. They are designed in that they fit the concave jaws of the coupling hub with the convex teeth of the spider. Combined with the straight spline this results in lower surface pressure and higher stiffness of the coupling system.

Flexible spiders of servo couplings:

The flexible spiders of our elastomer couplings are available in five different kinds of Shore hardness. This allows to easily adjust the coupling to the individual specifications of an application in terms of torsional stiffness and vibration characteristics. The teeth of the spider compensating for displacements are radially supported in the internal diameter by a web. In this way excessive internal or external deformation with strong acceleration or high speeds are prevented. The permissible ambient temperature depends on the Shore hardness of the spider.

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