35 - 560 Nm

ROTEX® GS P ETP backlash-free servo couplings

Servo coupling with hydraulic clamping bush for quick and frequent assembly

The ROTEX GS P ETP hub with an integrated high-precision hydraulic clamping bush is particularly designed for quick and frequent assembly.

The hub of our servo laminae coupling (elastomer coupling) is made of steel and fastened to the shaft safely and frictionally engaged via one single screw. There is high concentricity even after frequent assembly/disassembly. This ensures smooth running even with high speeds. Assembly without axial shifting of hubs.

New high-performance spider for backlash-free servo coupling

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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  • Backlash-free, vibration-damping shaft coupling with an integrated ETP quick clamping system
  • Quick assembly/disassembly, since one single screw must be tightened
  • Severely high concentricity even after several assemblies
  • Assembly/disassembly for thousands of times
  • Assembly in narrow spaces possible, since the pressure screw is tightened in radial direction to the shaft
  • Small mounting dimensions
  • The hub can be adjusted easily and accurately
  • Torsionally flexible
  • Axial plug-in
  • Axial, radial, angular compensation
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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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