Resumen
Aluminum alloys are frequently subjected to machining process and for this process is important their machinability, which depends on many factors. The Faculty of Production Technology and Management is often asked by companies with a request to solve a specific technical tasks. One of these tasks was the analysis of one specific aluminum alloy bath with worsened machinability. The rods from this alloy exhibited against assumption significantly worse chips during machining. That meant, of course, bad situation in area of machining tools. At the faculty were done analysis that could contribute to identifying the cause of the worsened machinability.