Torsionally stiff coupling with high power density. For applications under extreme conditions. Based on a flexible element of heavy-duty plastics with pressed-in steel bushes. Especially high-performance and rupture-proof design with high torsional stiffness. Bending elasticity properties allow for compensation of axial and angular misalignments. As a drive shaft, offers additional radial flexibility. Extremely light-weight and compact design. Oil-resistant, effectively ventilated and suitable for extremely high ambient temperatures.