Cutting sheet PVC..

A place for general potato gun questions and discussions.
User avatar
spudkpi
Specialist
Specialist
Posts: 135
Joined: Tue Aug 01, 2006 8:52 pm

Tue Aug 15, 2006 3:37 pm

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? :?: :?:
User avatar
noname
First Sergeant 4
First Sergeant 4
Posts: 2698
Joined: Mon Apr 10, 2006 9:19 pm
Location: Bay Area, CA

Tue Aug 15, 2006 3:39 pm

You could use a keyhole saw, but their like 15 bucks for a 3" one.
User avatar
BC Pneumatics
Sergeant
Sergeant
Posts: 1053
Joined: Tue Jan 18, 2005 6:55 pm
Location: Fresno, CA
Contact:

Donating Members

Tue Aug 15, 2006 3:46 pm

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.
User avatar
spudkpi
Specialist
Specialist
Posts: 135
Joined: Tue Aug 01, 2006 8:52 pm

Tue Aug 15, 2006 3:47 pm

How do i scribe it?
User avatar
SpudStuff
Sergeant 5
Sergeant 5
Posts: 1410
Joined: Sat Dec 10, 2005 3:55 pm
Location: Cupertino, California
Contact:

Tue Aug 15, 2006 4:36 pm

with a sharp tool like a chizel or pick
User avatar
BC Pneumatics
Sergeant
Sergeant
Posts: 1053
Joined: Tue Jan 18, 2005 6:55 pm
Location: Fresno, CA
Contact:

Donating Members

Tue Aug 15, 2006 5:24 pm

I would use an awl, or a wood scribe.
User avatar
schmanman
Staff Sergeant 2
Staff Sergeant 2
Posts: 1685
Joined: Sat Mar 25, 2006 12:28 pm
Location: Michigan,U.S.A
Contact:

Tue Aug 15, 2006 5:31 pm

a hole saw and a slow speed drillpress
Persistence is a measure of faith in yourself
User avatar
Shrimphead
Corporal
Corporal
Posts: 509
Joined: Thu Nov 17, 2005 7:42 pm

Tue Aug 15, 2006 6:57 pm

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.
Controlled insanity = Genius
Life flies when you're being dumb.
User avatar
rna_duelers
Staff Sergeant 3
Staff Sergeant 3
Posts: 1739
Joined: Mon Sep 26, 2005 7:07 am
Location: G-land Australia

Wed Aug 16, 2006 12:50 am

Get some sheet metal and make a 3" circle and use a propane torch to heat it up and cut a hole through it.
Image
User avatar
Pete Zaria
Corporal 5
Corporal 5
Posts: 954
Joined: Fri Mar 31, 2006 6:04 pm
Location: Near Seattle, WA

Wed Aug 16, 2006 12:59 am

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.
User avatar
mark.f
Sergeant Major 4
Sergeant Major 4
Eritrea
Posts: 3638
Joined: Sat May 06, 2006 11:18 am
Location: The Big Steezy
Has thanked: 58 times
Been thanked: 58 times
Contact:

Donating Members

Wed Aug 16, 2006 5:17 am

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?
olson1414
Private
Private
Posts: 7
Joined: Tue Aug 15, 2006 9:24 pm
Location: Oshkosh WI

Wed Aug 16, 2006 3:30 pm

find someone with a lathe
User avatar
BC Pneumatics
Sergeant
Sergeant
Posts: 1053
Joined: Tue Jan 18, 2005 6:55 pm
Location: Fresno, CA
Contact:

Donating Members

Wed Aug 16, 2006 4:29 pm

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...
olson1414
Private
Private
Posts: 7
Joined: Tue Aug 15, 2006 9:24 pm
Location: Oshkosh WI

Wed Aug 16, 2006 9:49 pm

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
Post Reply