smart51
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| posted on 19/6/11 at 07:56 AM |
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How to cut round tube "square"
I have to cut 32 pieces off a round tube, each 24mm long. The cuts have to be square across the tube. With RHS it would be easy - put a tee square
across the tube and mark it off. How can I do this with round tube? I've done a couple by eye but when welded up look way off. I'm
looking for less than 0.5mm runout.
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omega 24 v6
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| posted on 19/6/11 at 08:02 AM |
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take a piece of paper ( square ) wrap it round the tube so that the edges line up ( i.e. no overlaps at the sides ) mark it and cut.
Simples
If it looks wrong it probably is wrong.
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SeaBass
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| posted on 19/6/11 at 08:07 AM |
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Make a very simple jig from wood - like a mitre box. It would take minutes. You could even add a length stop - just push the tube up to it and cut.
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robocog
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| posted on 19/6/11 at 08:09 AM |
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Use a chop saw and clamp it so it can only be cut square?
Or get a chunk of steel with a hole the same diameter as the tube and clamp it (thinking slit down one edge and them use a vice to hold the tube and
use this as a guide)
get a piece of tubing - Plastic/PVC would do - that will just slide over the piece you want to cut and use that as a guide for either marking out or
for direct cutting against depending on method of cutting
(can jubilee clip it in place if you slit the guide piece - the guide could be faced off in a lathe if necessary)
Will try and use MSPaint to try and illustrate the above if my descriptions are a bit vague
Regards
Rob
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robocog
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| posted on 19/6/11 at 08:14 AM |
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Or wood as pointed out...
[img]
 
Description
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Regards
Rob
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wicket
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| posted on 19/6/11 at 08:25 AM |
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Can't you find somebody with a lathe that could do them for you? Some one on here a perhaps.
More accurate and consistent.
[Edited on 19/6/11 by wicket]
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matt_gsxr
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| posted on 19/6/11 at 08:31 AM |
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What about one of these?
http://www.transtools.co.uk/store/prod_7914/plumbing-tools/steel-and-stainless-pipe-cutters/rothenberger-inox-no-30-stainless-steel-tube-cutter-3mm-30
mm.html
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zilspeed
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| posted on 19/6/11 at 09:48 AM |
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Or, get a bit of square tube which the round just fits inside.
Use that as your cutting guide.
Or, cut long to allow fettling.
A sanding station with disc and table would do this.
Lathe would be best if absolutely square is essential though.
[Edited on 19/6/11 by zilspeed]
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llionellis
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| posted on 19/6/11 at 10:06 AM |
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Clamp a jubilee clip round the tube and use it as a saw guide.
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TheGiantTribble
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| posted on 19/6/11 at 10:55 AM |
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IMHO the pipe cutter pictured earlier is the easy cheepo I mean 'Locost' answer.
But I seem to remember they cut better with a quick squirt of WD40 to the cutting wheel, helps stop the cutter from spiraling down the tube/pipe.
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smart51
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| posted on 19/6/11 at 12:12 PM |
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All good ideas. I quite like the jubilee clip one. Thanks.
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