Abstract. The article discusses the mechanical processing of aircraft parts on CNC machines
made of hard-to-process materials. Methods of preparation of control programs for CNC machines
are considered. A control program for an airplane part has been developed using the SolidWorks
software product. The efficiency of the technological process of mechanical processing depends on
the correct choice of equipment, technological cutting modes, and the choice of cutting tools.

Key words: hard-to-process materials, CNC machines, control program, aircraft parts.