MDO Exterior Table Top - Woodworking Talk - Woodworkers Forum
 
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post #1 of 4 Old 08-30-2013, 01:33 PM Thread Starter
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MDO Exterior Table Top

The glass patio table top shattered due to temperature extremes. I plan to replace it with a 3/8" MDO plywood. The top is roughly 3.5' x 6' and is oval. My options for cutting it are an older low-end jigsaw (which I think will work better to cut the oval) or an older low-end 7-1/4" circular saw.

The MDO will fit into a channel on the table frame.

What is the best blade / technique for cutting the plywood to get the smoothest cut and the least splintering? Would like to do it in a few days, so prefer a blade I can get locally (or if it happens to be one I already have, so much the better).

I think I'll need four sawhorses to give stable support to the MDO while cutting.
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post #2 of 4 Old 08-30-2013, 01:38 PM
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Circular saws are for cutting straight lines, very dangerous to try and cut a curve with one. How do you plan on sealing this against moisture?

The tools don't make the craftsman....
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post #3 of 4 Old 08-30-2013, 02:53 PM
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More teeth per inch is what you want, though some of it depends on the saw. There are blades available that have no tooth set, that also helps with a smooth cut....both criteria make the saw cut more slowly, and you may even break a blade. If the saw has orbital action, it may cut a little cleaner (this is all in reference to the jig saw). Don't go for the metal cutting blades, the packages should have a description of the material the blade is made for. Cut with the work piece face down, that will give the face side the smoothest cut.

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post #4 of 4 Old 08-30-2013, 03:49 PM Thread Starter
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Quote:
Circular saws are for cutting straight lines, very dangerous to try and cut a curve with one. How do you plan on sealing this against moisture?
That confirms my thought of using the jig saw. I wasn't thinking about the danger aspect but knew that I probably couldn't do a very accurate cut with it. So far as sealing, I was thinking of a coat of primer, then a good exterior pain on all surfaces and the edges. I'm open for other suggestions.

Quote:
More teeth per inch is what you want, though some of it depends on the saw. There are blades available that have no tooth set, that also helps with a smooth cut....both criteria make the saw cut more slowly, and you may even break a blade. If the saw has orbital action, it may cut a little cleaner (this is all in reference to the jig saw). Don't go for the metal cutting blades, the packages should have a description of the material the blade is made for.
That helps.

Quote:
Cut with the work piece face down, that will give the face side the smoothest cut.
I assume you'd want a blade with teeth pointed up? That seems to be the case with most of the blades I have now.

I've read in the past that putting down blue painters tape of the cut can help with splintering, but don't know if that works with a jigsaw or not.
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