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Re: [ATM] Cutting large-diameter PVC
Following Norm's idea: use the skilsaw to rip thin, like 1/8" to 1/16"
pieces of straight grained flexible wood and bend them around the pipe,
using enough of them to get about 1/4" or 3/8" height, and holding them with
the hoseclamp? Better to steam the wood after cutting it to decrease
breakage? Getting too complicated...
The factory edge, or a sawn edge with the skilsaw and a fence aka
ripping/sawing guide of thick cardboard might just work for one or two cuts.
I have routinely cut 4" PVC with a 10" chopsaw, works fine, takes 2 cuts.
If you can get your hand on a huge chopsaw, well aligned, that would work
well, as Norm says.
Rod
----- Original Message -----
From: "Norm Prince" <princenorman@bellsouth.net>
To: <atm@atmlist.net>; "Kevin MIchael Zabbo" <chaosopher23@yahoo.com>
Sent: Friday, October 19, 2007 2:29 PM
Subject: Re: [ATM] Cutting large-diameter PVC
>I like to use a "saw guide", or some other form of improvised fence when i
> am trying to cut straight lines with a circ-saw...being as i have yet to
> meet the person who can do it free hand...unfortunately you need a
> straight
> piece of lumber to make said "saw-guide", or improvised fence, and i
> always
> use a table saw to obtain that...not to mention they tend to be flat and
> not
> tube shaped...there is a very bendy form of ply-like lumber that is
> sold...some folks call it bendy-ply...i think its used mostly for curvy
> furniture...its about 3/8" thick...any way you could cut a straight chunk
> of
> that stuff and bend it around the tube with the appropriate offset for the
> foot of your circ-saw (shazam!...improvised fence) after having marked a
> line with the newsprint procedure i read that was
> mentioned...unfortunately
> again cutting a straight chunk of the stuff will require more than your
> circ-saw...but maybe you could use the factory edge...just a
> thought...maybe
> a layer or two of thick (non corugated) cardboard would have the same
> effect
> if wrapped and tacked to the tube...I will have to agree with Peter on
> this
> though that its definately not the best choice of tool for the job...I
> think
> a jig saw would be worse though....a very well squared and large miter saw
> is what i would try first...it will take two or more cuts, but you can use
> the first cut to align the saw after you rotate the tube...once you get
> one
> side square to your liking, cutting the other side is a breeze...just set
> up
> a stop block on the run off table and cut away.
>
> best of luck
> Norm Prince
> (bad ATMer...good carpenter)
>
>
> ----- Original Message -----
> From: "Kevin MIchael Zabbo" <chaosopher23@yahoo.com>
> To: <atm@atmlist.net>
> Sent: Friday, October 19, 2007 08:37 AM
> Subject: [ATM] Cutting large-diameter PVC
>
>
>>I have acquired, for free, two lengths of 10" PVC
>> pipe. One look at them and free may have been too
>> high a price, but there is enough pipe to make the
>> tube for my 8" Newtonian, as long as I tie the tubes
>> together. That part has been figured out. However -
>> (don't ya love this part of the emails?)
>>
>> The tubes themselves have badly out-of-square ends.
>> While I have experience cutting large diameter stuff,
>> I do not have access to much more than a circular saw,
>> which does a wonderfully fast job at cutting PVC with
>> a nice, sharp fine-tooth blade. While not a smooth
>> finish, it is fast and clean enough to rasp away.
>>
>> Is there an easy way to cut this stuff square, so I
>> don't spend a whole day rasping away at it to get it
>> to within the 1mm squareness that's good enough for a
>> telescope? Remember now, a circular saw is what I'm
>> going to use. I'm too lazy to go at it with some sort
>> of hand saw.
>>
>> Many thanks,
>> Transplanted Yankee, Seeker of the Darkness
>> Kevin
>>
>> I published my first novel! You can get it here, from the publisher!
>> http://www.publishamerica.com/greetingcardpro/pickup.asp?CardSentID=126045&rID=48283
>>
>>
>>
>> Their search stringbox is on the right side about halfway down.
>>
>> search using my name: kevin michael zabbo
>> and it will take you right to my book page.
>>
>> The title is anna's blood, which also takes you there.
>>
>> Please order your copy soon! I love you!
>>
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