FIELD: machine tool manufacture, gear cutting machine tools for working by hobbing cone gear wheels with use of cutter head. SUBSTANCE: machine tool includes tool unit arranged in cradle; blank unit; tuning unit; buildup wheel unit and hydraulic circuit for hobbing. Machine tool also has differential mechanism mounted in circuit of modifier and connected with cradle carrying tool; additional step hydraulic motor for driving differential and additional hydraulic pulse generator connected with it through pipeline. Sleeve of slide valve of additional hydraulic pulse generator is mounted with possibility of rotation by means of gear wheel mounted on worm of rotation drive of cradle carrying tool. EFFECT: simplified kinematic circuit of machine tool providing enhanced accuracy of working and lowered metal consumption. 1 dwg
