Getting mortising jig aligned - Woodworking Talk - Woodworkers Forum
 
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post #1 of 5 Old 07-23-2016, 02:40 PM Thread Starter
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Getting mortising jig aligned

I'm using my drill press mortising attachment for the first time. I'm trying to figure out how to get the edge of the mortising bit perfectly parallel to the fence. I have discovered if it's not parrallel to the fence, the mortise has little "steps" in it. Is there a tried and true way to get it lined up?
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post #2 of 5 Old 07-23-2016, 03:34 PM
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Not tried , but true

Place a 3/4" thick piece of stock between the rear of the square chisel and the fence and rotate the chisel until it's flat against the strip, still holding it against the fence as well. Then tighten the chisel in the holder. Use a piece whose thickness that is the same distance from the edge to the fence as you want your mortises and you'll be all set to go.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)
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post #3 of 5 Old 08-07-2016, 09:27 AM
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I use a Stanley knife blade clamped to front of chisel to align fence
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post #4 of 5 Old 08-07-2016, 12:34 PM
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I use a 12" rule clamped at its midpoint to the chisel & measure the distance from each end to the fence.
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post #5 of 5 Old 08-07-2016, 01:10 PM
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Quoting myself ....

Quote:
Originally Posted by woodnthings View Post
Place a 3/4" thick piece of stock between the rear of the square chisel and the fence and rotate the chisel until it's flat against the strip, still holding it against the fence as well. Then tighten the chisel in the holder. Use a piece whose thickness that is the same distance from the edge to the fence as you want your mortises and you'll be all set to go.
In case this wasn't real clear allow me to better explain. Let's say you want your mortises to start 1/2" from the back edge of the board. You take a 1/2" thick piece of stock and place it between the chisel and the fence, holding the chisel against it to square it up. Then tighten the chisel in the chuck and you are good to go:



You can make different thickness pieces for the various spacings you need... NO measuring! The combined spacer thickness (X2) and the width of the chisel will add up to the total width of the board.

The answer to your question will only be as detailed and specific as the question is detailed and specific. Good questions also include a sketch or a photo that illustrates your issue. (:< D)

Last edited by woodnthings; 08-07-2016 at 01:14 PM.
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