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Thread: Cutting 150mm PVC
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2nd October 2015, 12:07 PM #1SENIOR MEMBER
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Cutting 150mm PVC
Hi folks,
Hoping to start assembling some 150mm ducting on the weekend - anyone have any tips on good ways to make cuts in 150mm stormwater pipe?
Cheers,
Danny
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2nd October 2015 12:07 PM # ADSGoogle Adsense Advertisement
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2nd October 2015, 12:28 PM #2GOLD MEMBER
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I have never cut 150mm but have cut 90 and 100mm with a hacksaw and then run a file round the inside and outside of the pipe to remove the rough edges
Tom
"It's good enough" is low aim
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2nd October 2015, 01:06 PM #3SENIOR MEMBER
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I knocked up an over sized mitre box(just the square cut) and clean up with a deburring tool
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2nd October 2015, 01:06 PM #4GOLD MEMBER
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for the shorter lengths less than 3600, i just cut them on the panel saw. set the blade to be fairly low (20mm high or so), set a length stop, and then feed the pipe into the blade enough so it cuts all the way through the wall of the pipe. roll it so it cuts the full circumference. make sure when you are rolling, you are feeding into the saw in the correct direction. if you climb cut it it will spin out of your hands, BANG! and you will probably have a smelly deposit left in your pants.
for longer lengths, i just mark a line all the way around the pipe and cut it with one of those cheap $10 handsaws with the hardened teeth.
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2nd October 2015, 01:17 PM #5SENIOR MEMBER
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Thanks folks. My main saw is a bandsaw which definitely won't work, so I think a quick and nasty mitre box and a handsaw (or maybe the cordless reciprocating if blade length/vibration isn't a problem) will be what I end up with.
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2nd October 2015, 01:30 PM #6mark a line all the way around the pipe and cut it with one of those cheap $10 handsaws with the hardened teeth
Cutting on a power saw can be done but things can go wrong with a bang. DAMHIK."I don't practice what I preach because I'm not the kind of person I'm preaching to."
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2nd October 2015, 03:51 PM #7
In order of preference
- Drop saw going slow and careful
- Hacksaw
- Rolling across a low blade on the table saw with the blade set about 1/2" up
- Panel saw
I suggest you don't use a reciprocating saw unless you want to end up with a pile of PVC randomly shaped pieces.
I have used all of the above with success. The drop saw using a multi purpose or cross cut blade gives a nice smooth square edge and is by far my preferred method. I have never bothered with a mitre box when cutting by hand.
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2nd October 2015, 04:02 PM #8.
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Thats what I use.
If you want to fit PVC properly to PVC fittings the pipe should be cut as square as possible.
If the pieces are too long I roughly cut a cm or so over length with either a high TPI point handsaw or hacksaw and then I use the bandsaw to cut it square.
Shorter pieces up to 1m long I deal with myself - longer than that you will need a hand.
A bandsaw leaves a very clean cut compared to most other saws.
For pieces shorter than the bed of my mini lathe I have a 4 and 6" expanding jaw chuck and tailstock support that can hold PVC.
I use this to taper turn the outer edges of short pieces to give a better fit t
I also use this to part short pieces like joiners for 45º elbows
The jaws will also hold these joiners so the inner edges can be rounded over for minimal resistance.
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2nd October 2015, 06:53 PM #9GOLD MEMBER
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In order of preference these are what I use
SCMS
Bandsaw
Handsaw
Using a bandsaw is a bit tricky as it can roll and pull into the blade and one bent blade can be the result so slow and steady is the answer.CHRIS
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2nd October 2015, 07:32 PM #10SENIOR MEMBER
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I used both a hand saw and a jig saw with metal cutting blade. Both worked well.
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2nd October 2015, 07:43 PM #11GOLD MEMBER
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2nd October 2015, 07:49 PM #12.
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Tip: Smear a small amount of vaseline onto the joints - it makes it a lot easier to take apart if you ever have to - and you know it will happen sooner or later:
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10th October 2015, 03:36 PM #13SENIOR MEMBER
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Just to feed back my own results in case it's useful for anyone else - my preference is mitre saw followed by hand saw. Only two annoyance with the mitre saw - my 12" SCMS still needs at least two separate cuts to get through 150mm pipe, and more importantly... It makes one hell of a mess!
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11th October 2015, 12:44 AM #14GOLD MEMBER
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11th October 2015, 12:55 AM #15
Hey Danny,
I made up a jig for the band saw to cut my 150mm pvc. Just a piece of ply set to run in the mitre track with a piece of 2" wide scrap on top set at right angle to the blade with a 90 degree V notch for the pvc to sit in. 2 second cuts, all you need to do is make sure you hold the pvc firmly in the jig so it doesn't roll during the cut.
Hope this helps,
Cheers, Ian"The common law of business balance prohibits paying a little and getting a lot.. it can't be done.
If you deal with the lowest bidder it is well to add something for the risk you run.
And if you do that, you will have enough to pay for something better"
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