As a further development of ROTEX the backlash-free ROTEX GS has become the standard for numerous applications in servo technology. The five different spider hardnesses allow to adapt the stiffness and the vibration behaviour individually to every application. The ability for axial plug-in ensures a coupling system with easy assembly. With a large number of various hub designs and types, requests of the customers can be realized easily and fast. Coupling combinations like, for example, combinations with the backlash-free safety system KTR SI can be realized, too. Subject to its coupling design ROTEX GS is supposed to be fail-safe and can therefore be used on critical vertical axes, too.