| 摘要 |
A compact boring tool has a support base with a pair of blocks mounted thereon to mount a work piece and a feed support block spaced apart therefrom having a threaded opening for supporting a feed screw. The feed screw has threads matching the threaded opening of the support block and a quill rotatably mounted through its center, the quill having a socket head for being driven and a shank end for receiving and securing a drill bit or drill chuck. A locking pin selectively locks the quill to the feed screw to provide for power backing out of the feed screw and quill after a hole has been drilled in the work. A support plate attachment is provided for converting the boring tool for surface boring operation.
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