The International Conference on Gears 2013 in Germany is a broad platform for equipment manufacturers and producers and researchers of gear and transmission systems to present new solutions and their latest research results. Supported by national and international associations the conference will show, what the transmission and drive train industry can contribute to increase energy efficiency. Gears are vital in the efficiency of different applications. They transmit and vary torque between prime movers and applications. There is still room for improvement, which will be demonstrated by the presenters. New concepts for drive trains of energy supply systems provide answers to the increasing demand for energy worldwide. These concepts must be introduced to global markets more quickly. Therefore, new designs are necessary and will be presented at the conference. The state-of-the-art of industrial applications will be demonstrated at an exhibition beside the conference.