A rotating Dynamometer (RCD) is inserted directly into the machine
spindle while the tool is connected with the RCD via the respective
tool holder. The RCD rotates as well during operation
due to the connection with the machine spindle. An RCD has two
advantages over stationary Dynamometers: On the one hand,
the dynamics of the measurement instrument is not influenced by
changing masses, as the tool mass remains constant. On the
other hand, it is possible with the aid of the built-in multi-component
sensor to measure the torque Mz directly during the entire
measurement, thus making it possible to have, for example,
targeted statements regarding the wear on the tools.