I would appreciate some advice on cutting slots in plywood. The ply is
1/4" thick, 4" wide & 4 feet long. I have around a dozen to do. I would
like 1/4"slots 2" across the width every 8".
The best way I can think of doing it is to very carefully mark out one
piece of ply & cut the slots with a router and use that piece as a
template for the rest.
Perhaps some one has a better idea. Is there a giant dovetail jig maybe
Table saw with a dado blade, and a quality fence with an accurate rule
would make this easy. If it was me, I'd cut the grooves first and then
rip the smaller pieces from it.
One question though, if you cut a 1/4" slot on a 1/4" thick piece of
wood, it's not really a slot anymore, is it?
The piece is only 4" wide and the desired slots are 2" across this 4" width.
The dado blade would probably be one of the more cumbersome methods for this
need. It would leave lots of hand work finishing both ends of each slot and
would really only clean out a very small amount of each slot. A simple jig
for the router table would work much better and would accomplish the task of
cutting a slot in one pass with a 1/4" straight cutter.
Why not? Is a slot defined in some way that would make this inappropriate?
To me a slot can be clear through as well as only partially through.
Hmmmmm. New to me then. Here's what one definition for slot is...
A narrow opening; a groove or slit: a slot for coins in a vending machine;
a mail slot.
I was not aware of any specific definition for it in woodworking. I would
have used the same term as the OP. So - enlighten me... what is the
woodworking definition of slot and what would have been a more appropriate
The slots are two inches in from one side. They do not have to be
absolutely precise but cutting through all twelve strips at once with a
jigsaw would be too far out. If you have tried to cut a straight line
in three inch wood with a jigsaw you will know what I mean.
Are you cutting 2" in from the edge, or 2" centered in the middle?
If you're cutting in from the edge, you could put your workpiece up on
edge in front of a backer board, then use a 1/4" dado set raised 2" high.
If you're cutting in the middle of the board, then the router is likely
your best bet and you could use something like this as a guide:
If there's not a big hook attached to this post, then here's one
solution to the question. No mention as to the quality of the
results was asked for. Cut all of the pieces to size, stack all
twelve pieces, the work piece is now 4 inches wide, 4 feet long and 3
inches thick, mark the top one for your slots, drill both ends of the
marks with a 1/4 inch drill bit and cut out the center with a jig
The email@example.com entity posted thusly:
As you can see from the various replies to your post, it pays to
describe the problem in specifics, rather than generalities.
From the description you gave, the slots might be through the work or
not, starting at one side or centred across the width. Assumptions
abound when you don't describe fully.
What are the pieces for? (just curious)
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