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The principle of this special tool is really quite simple. Just install your Drill Chuck on the MARK V spindle. Then, slip the Mortising Attachment over the outside of the quill on your MARK V and tighten it in position with a single 5/32-inch setscrew. Insert the Mortising Chisel of your choice (1/4-inch, 3/8-inch or 1/2-inch) in the other end of the attachment and tighten the setscrew. Now, slip the appropriate Mortising Bit up through the hollow chisel and secure its shaft in your drill chuck.
The attachment holds the chisel (with sharp, honed edges) and keeps it from rotating while the special Mortising Bit inside turns. As you advance the quill, the rotating bit removes the majority of the stock while the chisel’s edges shave the sides of the mortise square and smooth. The special Hold-Down attaches to the top of your MARK V’s rip fence to keep your workpiece from lifting when the chisel is withdrawn. The Shopsmith Mortising Package
will help you make all of these mortised joints |
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