20120257941 | RETRACTABLE SHANK FOR MACHINE TOOLS AND USE OF SAID RETRACTABLE SHANK IN MACHINE TOOLS - The present invention relates to a retractable shank for machine tools and use of said retractable shank in machine tools made up of a shank core, on which there is arranged at least one front unit formed by a rotating bush which is associated, by means of bearings, with respect to a fixed portion of the machine structure, this front unit being removable by means of outwards extraction or inwards movement, leaving a space in which the rear rotating shaft of the headstock can be housed. | 10-11-2012 |