World's simplest keyhole jig - Router Forums
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post #1 of 33 (permalink) Old 12-08-2015, 01:45 PM Thread Starter
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Default World's simplest keyhole jig

I wanted to put keyholes on the back of some signs for easy hanging and thought I'd just do them on the router table because it would be quick and easy.

Quite frankly when I tried a sample piece I didn't feel comfortable trying the get the wood into the correct position, drop it down onto the spinning bit, and move it along the fence to right spot. Rule one: if you don't feel safe doing it — DON"T DO IT.

So next I thought about some exotic jigs but fell back on my old adage: Simpler is always better. (Good old Occam and his Razor.) So, I used a 5/8" straight bit to cut a through slot in some 1/4" mdf. Yes, I did it by dropping the stock onto the bit in the router table but I started with an oversize piece of mdf, the router bit wasn't very high, and I could see where it was while I was routing.

Then I trimmed the jig to 4" x 4" with the slot positioned so when the top edge of the jig was aligned with the top of the sign, the keyhole is in the right position. Then it was just a matter of drawing a keyhole center line on the sign, attaching the jig with double-sided tape, and plunge routing using a 5/8" guide bushing.

I was able to knock out six keyholes in record time - safely - with this simple jig.

.
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post #2 of 33 (permalink) Old 12-08-2015, 02:42 PM
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Oliver ,could you have run your bit down on the table,laid to board down and down flat and slowly raised the bit to the right height and advanced to the stop, then turned off the router to remove the piece?

Nice jig and a good safe way to solve your problem.

Herb
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post #3 of 33 (permalink) Old 12-08-2015, 03:07 PM Thread Starter
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Quote:
Originally Posted by Herb Stoops View Post
Oliver ,could you have run your bit down on the table,laid to board down and down flat and slowly raised the bit to the right height and advanced to the stop, then turned off the router to remove the piece?

Nice jig and a good safe way to solve your problem.

Herb
I don't have a router lift, Herb, and trying to hold the board in position while I try to raise the bit from under the table, stop it at the right height, and then lock it down sounds even scarier. I NEVER adjust the router unless it unplugged and even then I check twice.

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post #4 of 33 (permalink) Old 12-08-2015, 03:24 PM
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well done as usual Oliver...

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
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post #5 of 33 (permalink) Old 12-08-2015, 04:14 PM
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I understand, I think you did an excellent job of resolving your problem. That same jig can be revised to do other operations too.

Herb
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post #6 of 33 (permalink) Old 12-08-2015, 06:15 PM
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A+ on the jig! I'd end up starting at the wrong end, or clamping it upside down, but that wouldn't be the jig's fault.
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post #7 of 33 (permalink) Old 12-08-2015, 07:41 PM
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Well done Oliver and the highlighted words would make a good shop sign. I agree with you too that that is exactly the kind of job plunge routers were made for.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #8 of 33 (permalink) Old 12-08-2015, 11:28 PM
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Very simple, very nice, Oliver!
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post #9 of 33 (permalink) Old 12-09-2015, 01:52 PM
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Perfect example of KISS. Well done Oliver!

Mike
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post #10 of 33 (permalink) Old 12-09-2015, 02:59 PM
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Nice work Oliver, a jig does not have to be more jig than you need, just enough to do the job and yours is what I would do. N
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