Sat, Dec 1, 2007, 3:58pm (EST-1) firstname.lastname@example.org (samson) doth
Does anyone use this jig? If so, how does it work for you? <snip>
Granny Weatherwax says:
You'll never get anywhere if you believe what you "hear". What do you
It's simple enough, so why not just make one, try it, and see if
you like it?.
Even Popeye didn't eat his spinach until he had to.
Not too fond of the design, just because it pinches the work, *not* pinching
it would result in slop in the joint. Seems like an edge guide would work
just as well, but if you go that route (har!), be sure to route the side of
the mortise away from the edge guide, so any slop is routed away in pass #2.
I built one and it worked great. I made a few modifications but the
only one I can recall is that I beveled\chamfered the inside face of
the guides leaving only 1/4" flat at the upper edge so I minimized the
drag on the 4" wide legs I was working on. My test runs showed that
once I had the fence tight enough it would easily bind and having less
mating surface made the jig slide a lot easier.
I tried a few different jigs where the jig's baseplate is clamped on
top of the wood to be mortised. The challenge is always to get the
baseplate either securely clamped to the wood, or have it slide evenly
and still remain in tight, square contact. None of these designs
worked well (and it did limit the depth of the mortise.
In the end, I chose to clamp a sandwich of the work piece and two
boards in my vise. I made sure the two side board were flush with the
top of the work piece. This sandwich provided a wide enough base so
that I could use the router's edge guide.
I was making loose tenons for the apron of a table, so the design had
to allow making mortises in the end of a board.
For the OP ... Tage Frid still has one of the most elegant designs for a
mortise jig in the face of stock:
... and for mortises in the ends of stock, the second one on my jigs page
(scroll down to Router Mortising Jigs) is hard to beat:
A pdf of the plans is available at FWW, but you have to be a member to
access it, IIRC.
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