The knowledge of the properties of the process of cutting aluminium is getting more and more important nowadays, particularly because of the large number of fields where aluminium alloys can be used, such as in automotive, war and aerospace industries. One of the most widespread index numbers used for measuring surface quality are Ra and Rz values. In this article, the authors examined the cutting capacities of aluminium parts (reinforced with silicon) with the help of design of experiment (DOE). The investigations were carried out with different edge-geometry diamond tools and conclusions were drawn about cutting abilities of the diamond tools used.