Probably so as most Oak plywood is only Oak veneer on the outside and the
rest is rather soft wood. You will however also need a bit that cuts 3/4"
wide and DO NOT count on the plywood fitting snugly. You will need a
narrower slot for 3/4" plywood to fit into.
I think it should be fine in 1 pass. I managed to break a 1/4"
straight bit doing a 3/8" deep dado in 1 pass, but that bit was on the
cheap side, and there's a lot more metal behind a 3/4" bit.
If you're trying to fit 3/4" plywood into that dado, though, as a
previous poster mentioned, it won't fit tightly. There are undersized
plywood bits available if this is your intention.
You can also do it with a bit smaller than 3/4. Do one pass then move your
straight edge, edge guide, or whatever you're using to guide the router to a
new position that will take out the rest of the wood necessary to obtain a
dado that will give you a snug fit with the undersized plywood.
Pretty hard to make a 3/4" wide dado with a 1/2" wide bit.
Assuming you meant the depth in one pass, yes. However, measure carefully
the wood/plywood going into the dado. 3/4" stock/plywood rarely is 3/4".
Also, go slow when entering and exiting, tearout can be an issue with some
Oak ply. I would suggest dada first, then rip to final width. Full speed
on the router bit.
On 16 Mar 2006 05:45:48 -0800, email@example.com wrote:
That's a lot of removal for one pass, although it can be done with a
router table, a short dado and good dust collection. 20,000 rpm is
about right. You'll get better results and more safety with 2 passes.
If your using a 2 - 3 hp router with a sharp router bit, and a good chip
removal system, you could rout a 3/8 inch deep dado in oak plywood in a
single pass. However, the best results would be achieved making two
passes of equal depth. The recommended speed is 24,000 rpm for bits
with diameters of 1" or less. There are several variables when
determining the optimum speed for a router bit including bit
construction, shank diameter and the materials you will be routing and
the rate of feed. Since you have Internet access, I would recommend
checking out http://www.newwoodworker.com/rtrbitspds.html and
http://www.woodtechtooling.com/Router_Bits/routerbits101.html for some
useful information. Be sure to use a backer board along the edge of
your stock where the router bit will exit to avoid tearout. This will
give your edge a nice finish.
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