Educational Institution: Volgograd State Technical Economics College Project description: At the competition the diploma project on the topic "Design the site for mechanical processing of part, develop efficient technological process, evaluate economical efficiency of the design of the part "Shaft 25-15" was presented. The design of the real part "Shaft 25-15", used in the mechanism of back-blow in the plant FGUP PO "Barrikady", was implemented. Drawings of the part, blank, tools and accessories were performed in the program T-FLEX CAD 2D and T-FLEX CAD 3D. For the operation 015, the control program was developed in T-FLEX CAM. Technological process was designed with the use of the T-FLEX Technology program. Particular attention in the project was paid to a design of special mill-centralizing device. The design of the device was based on the already existing design with several modifications. The new device was manufactured from the created drawings.