Based on the proven ROBA-DS steel disk pack coupling, Mayr Power Transmission developed a weight-optimized aluminum version. Compared to the steel version, the outer diameter of this new design has been reduced by up to 10 mm; the mass and mass inertia range from 40 to 60 percent of the steel version, depending on the design and size. The performance density, however, remains unchanged. It is tailored to meet the requirements of high-speed applications, for example in the field of test bench technology.