| 摘要 |
<p>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 (13), on which there is arranged at least one front unit formed by a rotating bush (17) which is associated, by means of bearings (16), 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 (19) in which the rear rotating shaft of the headstock can be housed.</p> |
