| 摘要 |
<p>Swarf or dust generated at the boring location of a drill 2 is sucked away through a mouth 12 of a suction member 10 and a connection 13, while the member 10 is located coaxially with a drill chuck 1 by a stressed compression spring 8 reacting on an annulus 11 on which a mounting ring 3, detachably fixed to the chuck 1 rotates. As the drilling proceeds the spring 8 is compressed and the suction action is enhanced by a tapered inside surface 15 of the suction member 10. <IMAGE></p> |
