MURPHY’S DRILL PRESS TABLE EXTENSION JIG
After I finished working on the drill press table and posting it on LJ’s I drilled out 30+ holes accurately for my next project. I am building a chainsaw mill bench/stand. I was pleased that I accurately drilled the holes for the carriage bolts in the supports and cross members.
My next task was to pre-drill screw holes in the support bracing that will hold the cross members and supports.
I stood there thinking “how am I going to drill these accurately,” and it came to me that I needed an accurate extension arm very similar to the kind used on crosscutting sleds. I was very fortunate to find a pristine four by three-quarter piece of clear pine which is unusual for my shop.
I sanded the pine board up to 220 grit, and coated it with two coats Of Seal Coat. I apparently did a good job or maybe it was just a really good piece of wood, but with a slight rubbing of four ought steel wool it was ready for marking. I purchased a fine and an extra fine sharpie.
I wanted to set up an accurate rule in one-inch segments that extended from the center of the drill chuck. This indeed was the most difficult part for me in that I am easily influenced by Murphy toward impatience and inaccuracy. You can see in the first picture that it was time for a coffee break. LOL!
After patiently marking the one-inch segments and accurately drilling holes at the zero, 10 inch, 20 inch, and 24 inch marks, two coats of waterborne poly were applied. After it dried. I attached the end piece that holds extended board with glue, nails and two screws.
I scribed lines from top to bottom at the zero mark, and 2 inch mark in both directions from center.
You can see from the back of the drill press the extended arm with stop. You can also see that I drew a line with the sharpie that goes through the center of the drill press table to line up to zero mark on the drill press fence and extension.
You can also see that the extended arm can also provide one-inch reference points when necessary in order to drill other types of holes.
Thanks for checking this out! As always, your comments, criticisms and witticisms are always welcome!
-- Cau Haus Designs, Thomas J. Tieffenbacher