The modern machinery production preserves the trend for the constructive complication of products remains, the inclination not only to use new construction materials but also the substitutes for metals. On the one hand, such solutions allow reducing the metal consumption of machines and improving the performance characteristics of equipment, which is especially important when working with high pressure, humidity and aggressive substances. On the other hand, there is a technological complication of machinability of the listed structures consisting of a combination of dissimilar structural materials (for example, metal-plastic). In addition, the machinable surfaces may have the break elements formed by the secondary structural elements (for example, grooves, protrusions, hollows, small holes and other elements of different numbers, combinations, shapes, and locations). One of the main metal working tasks is to prepare the reliable documentation required for the process engineer to machine such products of the highest constructive and technological complexity.