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Cutting copper tube lengthways ?

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Cutting copper tube lengthways ?

Postby Pikey » Mon Sep 11, 2017 12:30 pm

I wanna make strips of copper. Easiest way I can think of would be to cut copper tube in half lengthways.

I suppose the angle grinder would do it, ,but straight would be a slight issue and the material removed might be quite a bit.

Anyone come up with a bright idea on how to do this ?
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Re: Cutting copper tube lengthways ?

Postby Pa_bon » Mon Sep 11, 2017 3:19 pm

.035 cut off wheel on a grinder will do it with little material removal.
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Re: Cutting copper tube lengthways ?

Postby zedzedtop » Mon Sep 11, 2017 4:41 pm

And I'd jig it and make a sled for a nice straight cut.
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Re: Cutting copper tube lengthways ?

Postby Pikey » Mon Sep 11, 2017 5:16 pm

Thanks lads :8)

I've never done the "Jig and sled" - do we have a link - or a description of how to do it please ? I can sort of see what you mean ?

Or could i fix the grinder and feed the tube through a former ?
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Re: Cutting copper tube lengthways ?

Postby Azframer » Mon Sep 11, 2017 5:57 pm

Place the pipe in the door jamb against the door stop and scribe a straight line on it.
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Re: Cutting copper tube lengthways ?

Postby zedzedtop » Mon Sep 11, 2017 11:10 pm

Well you'd want the cutter, whatever it is, rigidly mounted like it would be in a table saw or a locked radial arm saw. Then you'd have a fence so the copper pipe slides at the right distance and parallel to the cutter. A sled could be rigidly attached to the pipe, so the pipe isn't the only thing you slide, but the pipe and a sled of sorts. The sled will stop the pipe from rotating as you slide the whole pipe/sled assembly into the cutter.

Is it more expensive to just buy copper strips?
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Re: Cutting copper tube lengthways ?

Postby Tracker » Tue Sep 12, 2017 8:40 am

I would have thought that cutting copper sheet into strips would be easier and cheaper that cutting pipe.


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Re: Cutting copper tube lengthways ?

Postby Pikey » Tue Sep 12, 2017 2:11 pm

Tracker wrote:I would have thought that cutting copper sheet into strips would be easier and cheaper that cutting pipe.


Cheers.


Coppper sheet is hard to get, thin and expensive over here !
Old plumbing pipe is not !

THanks for the replies all :8)
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Re: Cutting copper tube lengthways ?

Postby Kareltje » Tue Sep 12, 2017 4:57 pm

I was thinking in the way zedzedtop thinks, but azframer has a good, home made solution too. But the mere writing a line is not enough, you would need a steady way to move your cutter from top to bottom (or bottom to top).

I read something about annealing too, but maybe that was another thread or forum?
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Re: Cutting copper tube lengthways ?

Postby Azframer » Tue Sep 12, 2017 6:32 pm

He was only showing his tools he might use, I can only show him how to get a straight line on the tubing to make the first cut. He could work on the annealing after the first cut then flatten it out and cut with tin snips after that.
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Re: Cutting copper tube lengthways ?

Postby Pa_bon » Tue Sep 12, 2017 7:16 pm

He could also cut the pipe into short pieces the width he wants his strips then slice that piece and flatten. This all depends on the dimensions he needs the strips.
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Re: Cutting copper tube lengthways ?

Postby zedzedtop » Tue Sep 12, 2017 10:06 pm

You could also drive you car over it a few times.
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Re: Cutting copper tube lengthways ?

Postby Pikey » Wed Sep 13, 2017 1:33 pm

Thanks all - Here's what I wanting to do ;

preheater lid resize.jpg


Firstly I want a strip to form a downstand on the inside of the top, so it locates inside the bottom, so any condensation is likely to run down inside the pot and also be positively centred. That could be a piece of half inceh, opened out and flattened.

Now, when I formed the flange, I obviously thinned the metal and as can be seen, have tried thickening a portion of it with solder.

However, I had a thought when I was reading the posts ; if I were to form a circle out of say half inch copper pipe, Solder the two ends together with a connector, then cut it in two halves, so I had two circles, these could be soldered onto the flanges top and bottom, giving reinforcement and also something rounded for the clips to bite on. Alternatively they could be flattened and just used for reinforcement to make thicker more solid flanges.
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Re: Cutting copper tube lengthways ?

Postby Pikey » Thu Sep 14, 2017 3:33 pm

Has anyone tried to bend 1/2" copper by hand ? I have pipe benders (but lent out atm) and they bend to too tight a radius anyhow. SO cound I just use the pot itself and bend the copper by hand around the bottom 1" or so where it would be stiffest ?

Or could I use a bike wheel rim for example ? Or would it just crease ?

There are planty examples of thinner tube bent to form Deflegmaters etc - can 1/2" be done the same way ?
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Re: Cutting copper tube lengthways ?

Postby Tracker » Thu Sep 14, 2017 5:56 pm

1/2"bends fine by hand, just make sure it is properly annealed before beginning.


Cheers.
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