Milling machining centers are highly automated standalone numerically controlled tooling machines with the addition of automatic tool change and storage. Milling machining centers are put into a multioperational tooling machines because they are characterized by the concentration of different operations in a single clamping metal shock. In addition to the main rotational motion of the cutting tool, in the beginning they had only three rectilinear sliding movement of the axes X, Y, Z, and had triaxial simultaneous control. Adding additional axes multiple axis milling axis machining centers were created. Their apperance has led to greater flexibility of production systems, more accurate and faster processing, and rapid development of CAD/CAM software. The milling process is briefly described and different designs of classic milling machine tools. Milling centers are also described with their basic elements and reasons why milling centers are important in the application of today's production. The possibilities of three-axis processing and the possibilities and advantages of five-axis processing over three-axis processing are also briefly described, as well as its disadvantages. The work has explained the machining of steel on a Hurco VMX 10i three-axis milling machine according to the technical drawing.