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Cutting sheet PVC..
Posted: Tue Aug 15, 2006 3:37 pm
by spudkpi
I recently made some sheet Pvc from 3'' pipe in the oven. I flatened it out and I plant on using it for my 3'' piston and i need to be able to cut disks from the PVC sheet and i cannot think of a good method to cut perfect circular 3'' disks... please help?
Posted: Tue Aug 15, 2006 3:39 pm
by noname
You could use a keyhole saw, but their like 15 bucks for a 3" one.
Posted: Tue Aug 15, 2006 3:46 pm
by BC Pneumatics
There are cheap hole saws, you may want to run it in reverse and flow some water over the sheet if you use this method though.
I say scribe the circle on there, then use ascroll saw, or, keeps scribing deeper and deeper until you get thru it.
Posted: Tue Aug 15, 2006 3:47 pm
by spudkpi
How do i scribe it?
Posted: Tue Aug 15, 2006 4:36 pm
by SpudStuff
with a sharp tool like a chizel or pick
Posted: Tue Aug 15, 2006 5:24 pm
by BC Pneumatics
I would use an awl, or a wood scribe.
Posted: Tue Aug 15, 2006 5:31 pm
by schmanman
a hole saw and a slow speed drillpress
Posted: Tue Aug 15, 2006 6:57 pm
by Shrimphead
You could just draw the circle on it, then cut as close to the circle shape as you can with whatever tools you have. Then sand it down on a belt sander.
Posted: Wed Aug 16, 2006 12:50 am
by rna_duelers
Get some sheet metal and make a 3" circle and use a propane torch to heat it up and cut a hole through it.
Posted: Wed Aug 16, 2006 12:59 am
by Pete Zaria
Assuming you don't have any expensive tools avalible such as drill presses...
Use a compas (the kind used for drawing, not a magnetic one) to draw a perfect 3" circle on the PVC sheet. Actually, make the circle 1/10th of an inch bigger than 3", to give you room to play with. Then go over that line with a razor blade, a little bit deeper each time, until you have it cut. Then use a file or sand paper to sand it down to exact size, and smooth the edges.
Peace,
Pete Zaria.
Posted: Wed Aug 16, 2006 5:17 am
by mark.f
How thick is the material? If it's too thick, I'd just saw out the circle roughly and then finish it up with a file or a Dremel.
What's this for, a piston?
Posted: Wed Aug 16, 2006 3:30 pm
by olson1414
find someone with a lathe
Posted: Wed Aug 16, 2006 4:29 pm
by BC Pneumatics
You want him to find someone with a lathe, to cut a disk out of a sheet of PVC for him?
Hopefully your 4th post will be better than ths one...
Posted: Wed Aug 16, 2006 9:49 pm
by olson1414
Well sorry thats how i would do it. But thats because i have i lathe out in my garage. I just thought of the right way of doing it. Using a scrib would take about an hour to do and i dont think that it would work very well.
You dont have to insult me because of my advice that is what this site is about right? giving advice