| 摘要 |
A clamping assembly for driving a knockout punch is provided. The clamping assembly has an outer member, an inner member, and wedges that are guided by keyways on the inner member. A user pushes onto the inner member, which causes the wedges to contact a cam surface on the outer member, which forces the wedges in a radial inward direction until threads provided on said wedges clamp onto complimentary shaped threads on a draw stud.
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