The paper presents one of the possible ways for efficient design of prismatic form tool for lathe. The aim of research was to study theoretically and experimentally the design methodology of prismatic form tool for lathe. The starting point in defining the methodology was interrelation between the tool for lathe and the work piece during a turning operation, method of conjugate surfaces and basics of analytical geometry. Mathematical model was established for a chosen work piece profile and based on it a program was written, whereby technical documentation was generated for prismatic form tool. Technical documentation served to design the technology and thus mathematical model, i.e. design methodology was verified. The results have provided conditions for further research and development of prismatic form tools for lathe
