Abstract: An apparatus for the machining of cylindrical surfaces on metal-cutting lathes. The apparatus has a housing, a toolholder with tools and a head with deforming rollers. The toolholder is provided with an opening through which the work passes, and the tools are clamped in the toolholder so that their points are opposite each other. The housing is topped by guides secured in a plane at right angles to the direction of longitudinal feed with provision for rotation during setting-up, and the toolholder is fitted to the guides with provision for floating in the course of machining.

Abstract: An apparatus for the machining of cylindrical surfaces on machine tools comprising headstock and tailstock centers to support the work placed therebetween, a tool head, and a head with deforming rollers spaced equidistantly apart in a circumferential direction. The heads are consecutively arranged in a housing fitted to the carriage of a machine tool. A portion of the tailstock center that, in operation, is face to face with the work serves as the guide for the deforming rollers and has a diameter virtually equal to the diameter at which the deforming rollers are set. Its end next to the work is adapted to accommodate the point of the tool in a position preparatory to machining.