The torsionally stiff compensation couplings are particularly suited to accurate drives with average torque values. This couplings are the ideal solution for accurately connecting two shaft journals at a true angle. Axial, radial and angular displacement between two ends of a shaft can be compensated within defined limits. This produces no bearing stresses worth mentioning as a result of the low restoring forces. A strong shaft-to-shaft connection guarantees backlash-free transmission of torque, even without additional keyway bolt. Low mass moments of inertia and a high quality kinetic energy guarantee excellent dynamic behaviour, even at high revolutions. As a basic principle, the couplings are wear- and maintenance-free. The range of possible uses extends from challenging drive systems in general mechanical engineering through applications in metrology and automatic control to the spindle and axial drives of machine tools. Other typical examples of their use include textile, packaging and timberprocessing machines as well as industrial robots and multi-spindle drilling heads. In addition the couplings are used in aviation, medical, etc.