Engineering ROTEX® GS

T: +49 5971 798-0

0.2 - 5,850 Nm

ROTEX® GS backlash-free servo couplings

Low-priced, backlash-free servo couplings - easy and quick assembly

ROTEX GS is a three-part servo coupling (elastomer coupling) backlash-free under prestress. The different hub types and various kinds of Shore hardness provide the optimum coupling for every application in automation technology. It is used wherever drives have to position accurately. In spite of their vibration-damping properties the coupling is torsionally stiff so that you do not have to cut back on precision even with highly dynamic servo drives. The ROTEX GS backlash-free elastomer couplings allow for simultaneous compensation of radial, axial and angular displacements.

The backlash-free servo coupling ROTEX GS uses the construction kit system, it is available in a high variance of different hub types which can be combined within one coupling size. The choice of the hub material depends on the size and the hub is either made of aluminium or steel. Both frictionally engaged connections without feather keyway and positive-locking connections with feather keyway are available.

Applications of the elastomer coupling ROTEX GS:

couplings for machine tools, automation technology, drive technology, medical technology, packaging technology

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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  • Maintenance-free, backlash-free elastomer coupling / servo couplings
  • Easy assembly
  • Low-priced
  • Good visual inspection of wear and estimation of service life
  • Electrically insulating to interrupt leakage current
  • Vibration-damping
  • Axial plug-in, easy blind assembly, mounting of housing possible
  • Fail-safe, thus emergency mode properties with wear of spider
  • Ambient temperatures from -50 °C to +150 °C possible (depending on spider)
  • Clamping hubs are low-priced and allow for easy, quick assembly
  • Complying with ATEX (acc. to EU directive 2014/34/EU)
  • UKEX compliant (according to UKEX Directive SI 2016:1107)
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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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