A law adopted after the latest energy crisis in Brazil prohibits the pro- duction and marketing of machines with low energetic efficiency. For this reason, a measuring stand was built as part of a German-Brazilian pro- ject, and the energy consumption as well as the grinding quality of five Brazilian hammer mills DPM during maize grinding were determined and evaluated. In addition, the validity of different energetic calculation models known from the literature was examined. The results show the in- fluence of mass flow, rpm, and sieve hole diameter on specific energy consumption as well as its dependence on the comminution degree of the material.
