A very important catch, not only in the engineering, but also in any industry of production of national economy in general, takes the use of compressed air. Enlargening of industrial production volumes, parallel asks for larger demand of compressed air, for getting them more frequently use technologically most fashionable, economic and the safest of compressors machines - including screw types compressors. Geometry of screw type compressor shaft isn’t evolvent type, whereof is dependent compressor action productivity. For creating screw type shaft profile there is necessity to make special designed instrument with which assistance are available reach right forms of profile contours. In the beginning of this article is provided instrument designing possibilities examination, what operates with knock dawn method. In foundation there are examined three possible of calculation methods of instrument profile type: graphical, analytical and graphical analytical method. Also provide analysis of these methods usability in modern production. At the second part of work is given an analytical calculation of disevolvent instrument profile type, conformable the type of rotors of screw type compressors. At the end of article conclusion is done usability analysis of profile designing methods.