thyssenkrupp further expands test and development center for wind power components in North Rhine-Westphalia thyssenkrupp is further expanding its development activities for slewing bearings for the wind industry. To this end, the company has now put a new test stand into operation in Erwitte in the Soest district, especially for blade and rotor bearings in wind turbines. Storage for turbines [...] can be found there on an area of ​​around 7.500 square meters.