|Project by Bricofleur||posted 01-17-2010 05:45 AM||2557 views||3 times favorited||7 comments|
Tired of using scrap wood to prevent drill bits from blowing out the back of my workpieces (second photo) or ruining my wooden table, I came up with a better idea: Disposable sub-tables. I found out that it doesn’t cost more to use sub-tables and I get more life time from them. Also, since they don’t need to be accurate as inserts, they are faster to build. With several pivot holes in the back fence, I can use almost the entire base before throwing it away. Most important, each sub-table fits on all my drill presses.
Since most of my drilling tasks are milled in narrow stock, a 4-5” deep sub-table is enough. The back fence screwed to the base is meant to keep the stock from spinning and to act as a base for a pivot (1/4” carriage bolt & a cam lock), I’m able to use half of the surface area. When this half becomes a strainer, I spin it around and I reposition/screw the back fence to the other side, so I can use the entire surface before throwing it way and make another sub-base, keeping the back fence (note on the photos that holes are already predrilled in the front to accept the back fence later).
I insert the pivot bolt in the first hole and I swing the table according to the distance required under the drill bit, then I clamp the other end of the table. When the table has too many holes, I move the pivot bolt in the second hole, giving me access to a fresh surface of the table, and so on.
It gives a more professional look than scrap wood !
To see more shopmade jigs, click here for the summary page of my website.
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