Although I haven't been there in a while, I noticed yesterday that Home
Depot is carrying "Formaldehyde-free" plywood now (by Columbia Forest
Products). I thought that $39.95 for a 3/4" 4' by 8' sheet was quite fair
based on the prices of similar Formaldehyde-free materials I have seen
described (and availability is another thing altogether..). My
previously-discussed sensitivity to formaldehyde makes living or working
with the "ordinary stuff " impractical. If this stuff lives up to my
expectations, if may re-open doors that I perceived were shut-off to me! I
am hopeful! : ) For $20 they will provide me with a pickup truck for 75
minutes. Question: Can I, with a partner, safely cut a full sheet in half
on a 30" table saw (without risking kickback)?
You can probably do it without a partner if you go about it the right
way. However, kickbacks can happen even when the safest precautions
have been taken.
That said you can use one of more of the following methods:
1) Don't feed the plywood from right behind it where a kickback might
throw the wood.
2) Have a properly working splitter on the tablesaw.
3a) Use kickback pawls on the tablesaw.
3b) Use antikickback rollers on the wood when feeding the wood.
3c) Use featherboards on the top of the plywood sheet to hold it down.
4) Use infeed and outfeed tables or supports for cutting (or the help
of a partner)
5) Cut the plywood in half off the tablesaw (handsaw, jigsaw,
powersaw) and then cut the halves to size on the tablesaw.
I'm sure there's a few more safety precautions you can take, but these
above should get you started.
#5 is probably the best. Couple sheets of foam on the floor or driveway,
100" straight edge and a skill saw.
Always wondered about that since I've never tried it. Won't the skill
saw kick up a bunch of foam sheet pieces that stick to everything
because of static electricity? It alway drives me nuts trying to
dispose of static filled foam peanuts from delivery packages.
Definitely the pink or blue foam. In a pinch the beaded stuff is ok, but
there is the mess. I just always found it simpler to 'rip' a sheet of
plywood this way. That said, if the cut is within safe reaching distance, I
prefer to lay the sheet on saw horses rather than wrestle it onto the table
saw or crawl on it on the floor.
On Mon, 8 Feb 2010 17:48:05 +0000 (UTC), the infamous Larry Blanchard
Lay a piece of pipe over the foam, step on it, and create a void where
the saw blade won't cut foam. Also, use a shallow cutting depth, good
side down for the ply, and tape the back. Remove the tape toward the
cut edge so it doesn't splinter.
In order that people may be happy in their work, these three things are
needed: They must be fit for it. They must not do too much of it. And
they must have a sense of success in it.
-- John Ruskin, Pre-Raphaelitism, 1850
Yes. Especially when following normal precautions.
In addition, it would require a really powerful saw to throw half a sheet of
3/4" plywood instead of:
a) Cutting into the stock, or
b) Stalling the motor
The Formaldehyde Departme..,oops I mean the Eco-friendly Fabricated
Building Materials departments is an area I have tended to avoid ; )
I've been carefully inching my way back since I bought a house. I wore
a dust mask at the Woodworkers Show this year and had no problems
(unlike the previous 2 years).
The weight of a full sheet, or even half sheet would make kickback
on most contractor's saws (120v) minor. Just keep out of the way
and use outfeed rollers or table, along with something at the
side. When I had a shop, I built a little 12X30" table just the
height of the TS and kept it to the left of the TS. A couple
shelves in the table really added to its utility.
This reminds me of something I saw in the past year or so. Plan for a cart
for moving plywood sheets. Cart - like hand cart - swung the sheet up
parallel to the floor and morphed into an infeed table.
Think I remember the cart you're referring to. It was hinged at both
ends at 2' where the middle of a 4x8 sheet of wood would sit in the
cart. One would then swing the 4x8 sheet parallel to the ground and
then slide it onto a flat surface or a table saw for example.
Someone will post the link to it.
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