The steel lamina coupling RADEX-N was developed specifically for wind power stations: RADEX-N is a backlash-free, maintenance-free steel lamina coupling. The laminas made from highly stiff stainless spring steel and which are stiff in torsional direction ensure high misalignment figures with at the same time low restoring forces. Various single- and double-cardanic designs with spacer for shaft distance dimensions up to 12 m allow to adapt the coupling to the existing ambient design in an optimum way. A GFK spacer is mounted between the coupling assembly on the gearbox side and generator side serving for electric insulation. In this way potential leak current is prevented from going from the generator on to the gearbox where it would damage both bearings and splines. There is one positive auxiliary effect: The total weight is reduced and the ease of servicing is increased.