FIELD: machine tool building, namely tools for kinetoplastic shaping of standard surfaces of machine parts in general-purpose metal cutting machine tools. SUBSTANCE: at initial stage of working process axially fed head is moved by means of rotating blank along its axis. Two concave calibrating portions of two-roller set embrace worked cylinder for eliminating its bending and escaping out of working zone. When necessary length is achieved head is opened due to operation of opening mechanism and removed without reverse rotation. Novelty is head construction provided with two-roller set having calibration portion in the form of revolution surface whose generatrix is ellipse or circle approximating ellipse. EFFECT: possibility of working small-diameter cylinders, simplified design of apparatus due to elimination of supporting devices. 4 dwg
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