Numerous applications such as robotics, as well as rotary tables, machine tools and others require high torques, but offer only limited installation space. In addition, very fast and precise positioning movements have to be carried out with high payloads, and without backlash. The RV-N series from Nabtesco is especially lightweight and compact, yet has a heavy-duty construction, which makes it fit for new applications. The compact design is achieved by means of a main bearing with an integrated inner race. High power density is possible due to reinforcement of the eccentric shaft bearing. Reduction of the weight by 40% reduces the mass inertia and therefore improves the load conditions. Special heat treatment of all components during the production process ensures high thermal stability of the gears and a significantly longer service life. The series is available in diverse sizes with rated torques from 245 to 7,000 Nm.