tenoning platform is simple to make, and you will be able
to screw one together in just a few minutes.
so easy to make, in fact, that you may just toss it after
a job is completed. Next tenoning job, youll just make
a new one. You can easily tailor the jig to a special job.
Make it wide enough to accommodate two workpieces, for example.
Cut the parts. Five parts is
all you need, and you will probably find the stock for them
in your scrap collection. The parts arent big, and they
dont need to look good.
platforms must be flat, and it is a whole lot easier to assemble
the jig if they also are square. I favour MDF for these jigs
because it has a good edge. It is crisp, free of voids, and
wont develop washboard ripples after a few passes.
must be straight. They should be slightly thinner than the
stock you are going to cut tenons on. By making the fences
thinner than the working stock, you ensure that the platform
rests on the work, not the fences.
stop should be no thicker than the fences. Its end must be
Screw the platforms
to the fence.
Getting the main platform joined to the fence at a perfect
right angle is the most critical part of the entire procedure.
Align the platform edge flush with the edge of a fence piece.
Drill a countersunk pilot hole, and drive a screw, setting
its head below the platform surface. Then use a square to
set the guiding edge of the platform at right angles to the
fence, pivoting the pieces on that first screw as necessary.
Clamp the parts together when they are perfectly square. Drive
two more screws.
the platform to the second fence in the same way.
and attach the support platform next. An easy way to set it
is to butt a 3-in.-wide scrap against the main platform and
set the support platform against the scraps parallel
edge. Flush up the ends, and screw the platform in place.
the edges around the screwheads, to ensure the entire surface
is flat. Dust it, and apply paste wax to the platforms.
Mount the stop.
This is usually job-specific. You lay out one shoulder of
the tenon you want to cut, then clamp the marked piece in
the jig, with the main platforms edge dead on the layout
line. Putt the stop against the end of the work and drill
pilot holes and drive two screw through the support platform
into the stop.
tenoning platform is ready for use.
in. x 3/4 in. x 18 in.
in. x 6 in. x 8 in.
in. x 6 in. x 3 in.
in. x 2 in. x 6 in.