| 摘要 |
<p>An extractor (10) for removing a broken bolt stud having a pre-drilled bore from a threaded bore including a cylindrical body (12) having a drive head (14) on one end and expander (16) on the opposite end. A collet (18) is movably attached to the cylindrical body (12) by threads (17) permitting lateral movement of the expander (16) against the gripping means (26) causing them to expand and engage the pre-drilled bore. Rotation of the expander (16) permits removal of the broken bolt stud due to the friction between the extractor (10) and the stud.</p> |
