Hello I'm a newbee at joining with a router.
I want to build a cabinet (sides, bottom and top) out of 3/4 inch plywood. I
would like to use my tongue and groove bits. No problem cutting the tongue
on the edge of one sheet, but what's the best way to cut the groove on the
flat side of the other board. Do you hold the router sideways and then place
the plate against the edge and route the groove along the flat side? My bit
doesn't fit into my router table, the hole isn't big enough for the bit to
pass through. I have no rabbet bit that big.
I wouldn't go there for several reasons.
1) Tough to get a decent T/G joint in plywood since voids appearing just
where you don't need them are inevitable.
2) Trying to cut a groove in a piece of 3/4" wide any thing is just plain
A table saw, a fence and some feather boards will allow you to do the job
more safely, but again, not plywood.
If you truly need to join plywood sheets, take a look at the "Scarfer"
available from the Gougeon Bros. Do a google for their web site.
S/A: Challenge, The Bullet Proof Boat, (Under Construction in the Southland)
Not with a slot cutter in a router table or with a good edge guide.
Do both sides of the joint with the slot cutter. Use a thin piece of
wood or hardboard as a "spline" to join them.
Before the slots are cut, the edge must be straight and 90 degrees to
Not to say that biscuits won't work, however, rabbet/dado joinery for case
sides in plywood will give you a greater mechanical advantage, more glue
area, less or no clamping time and therefore quicker use of the the
component, and a carcase that is much easier to 'square up' than one joined
with biscuits and glue.
"Square" is the holy grail of cabinet making as all future operations depend
upon it, such as applying face frames, and fitting drawers and doors.
I have been using splines for years they are so simple to use a 1/4" cutter
with a bearing and a router is all you need .set it up to cut in the center
of one sheet and all is done insert the sline and glue it up.........mjh
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