ROTEX® Standard with KTL coating

ROTEX<sup>®</sup> Standard with KTL coating
  • torsionally elastic
  • torsionally dampening
  • axial plug-in
  • consider shaft distance
  • absorbs radial misalignment
  • 120 degree max. operating temperature
  • Atex
  • maintenance-free
  • corrosion-protected

Product features

  • Pilot bored, coated hubs available from stock

  • Product range: ROTEX 19 – 125

  • Corrosion protection class acc. to DIN EN ISO 12944: min. C4, heavy – long

  • Type of coating: cathodic dip-paint coat

  • Material of hub base: steel


Sales ROTEX®
T +49 (5971) 798-0
Engineering ROTEX®
T +49 (5971) 798-214

ROTEX® torsional flexible couplings are characterized by small dimensions, low weight and low mass moments of inertia yet transmit high torques. Running quality and service life of the coupling are improved by accurate all-over machining. Their application is ideal for transmitting torque while damping torsional vibrations and absorbing shocks produced by the uneven operation of certain prime movers.

ROTEX® torsional flexible couplings are equipped with the new temperature resistant T-PUR® spider which is available in three different degrees of Shore hardness.

ROTEX® Standard with KTL coating
Show specifications



n contrast to other flexible couplings, the intermediate members of which are subject to bending stress and are therefore prone to earlier wear, the flexible teeth of ROTEX® couplings are subject to pressure only. This gives the additional advantage of the individual teeth being able to accept considerably higher loads.

The elastomer parts show deformation with load and excessive speeds. Sufficient space for expansion should be ensured.

The maximum torsion angle with ROTEX® couplings of any size amounts to 5°. They can be fitted both horizontally and vertically.

T-PUR® - The new heart of ROTEX®

T-PUR<sup>®</sup> - The new heart of ROTEX<sup>®</sup>

With the temperature-resistant polyurethane T-PUR® of KTR the properties of the ROTEX® have been optimized importantly. T-PUR is a much more temperature-resistant and has a longer service life than polyurethane material. From the visual point of view we have characterized the material T-PUR® by the colours orange (92 Shore A), purple (98 Shore A) and pale green (64 Shore D). The previous spiders made from polyurethane in yellow, red and natural white with green ends will still be available.


Spider generation T-PUR® (PDF)



Coating process

The coating process seen here is the KTL painting, with a subsequent addition of a wet coating. After zinc phosphating, water-based epoxy resins are added to the intended ROTEX hubs a direct voltage is applied. Next, the painted hubs are baked in a convection oven at temperatures of up to 200° C. The result of this process is a coating which is resistant to numerous solvents, acids and lyes.  

The next step towards achieving high corrosion resistant properties is the inclusion of the wet coating. In addition to excellent corrosion protection, other benefits include: greater environmental friendliness, a more consistently even coating thickness,  high temperature resistance,  and greater fit accuracy of the hubs.

ATEX standard

ATEX standard

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