| 摘要 |
<p>The chuck, comprising a body with internal jaws (4) that converge to grip a tool bit (5), has the body made from sheet metal that is cut out and folded or stamped to form inward-facing guide channels (6) for the jaws and then closed in a tubular shape that allows assembly of the jaws and other components, especially a drive (12) for the jaws. The cut-out shape is made with a central ring (9) that forms the forward end of the chuck, and three fins (8) projecting from it to make the guide channels.</p> |
