Best way to straighten annealed copper tubing

[GreensandsParticipant @greensands]

Can anyone suggest the best way to straighten short lengths of bendable annealed copper tubing as typically supplied in the form of a coiled loop? The size of piping involved is 5/16” O/D and working lengths range from 4” to 6”.

[bernard towersParticipant @bernardtowers37738]

steel bar to fit the inside dia with rounded ends, slide in as far as you can then roll between two pieces of MDF sheet then push in some more  and repeat.

[Trevor Drabble 1Participant @trevordrabble1]

<p style=”text-align: left;”>A pyro straightener available from reputable electrical wholesalers .</p>

[Nick WheelerParticipant @nickwheeler]

The grooves in the clamping faces of a Workmate do an excellent job of straightening nearly a metre at a time.

[noel shelleyParticipant @noelshelley55608]

I’d use the method Bernard mentioned, Simple for that sort of length. Noel.

[John PurdyParticipant @johnpurdy78347]

I used Bernard’s method for the 3/8″ dia. tubes for my 5″ga. loco boiler and it worked very well. They were about 8″ long.

John

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