On Jan 18, 5:34*am, David Billington
wrote:
RogerN wrote:
Metalworking, resizing copper tubing-

Trying to install a valve on the copper tube going to the toilet tank. *The
original line is 5/8 copper tube going straight to the toilet tank valve.

So I cut off the tubing and tried to install a valve. *Turns out the 5/8"
tubing is a little larger than 5/8", the original tubing was too big for the
compression nut and ring.

I measured the tubing and reads around .655", about .030" too big. *I was
able to taper the end of the copper and hammer the compression nut onto the
tubing, this "sized" the tubing enough to get the compression sleeve on and
I got the valve on the line, but I would like to fix it better later.

I could either shrink the tubing down to .625" or expand to solder a
correctly sized tubing inside the end of the old tubing.
Are there any sizing dies or collet compression tools to shrink the tubing
to size?
Any reasonably priced tubing expanding tools to expand the end of the
original tubing to accept a piece of 5/8" tubing to be soldered in?

Thanks!

RogerN

Can you make a pair of swaging blocks?. Basically *bore a hole in a
suitable piece of *material to the current tube OD then cut the material
in half, you may want to add a taper at one end to blend the diameters.
You then squeeze the tube repeatedly , rotating slightly between each
squeeze, and you can quickly reduce the size by the amount you want. ...

Try the clamp bars in a flaring set. You might have to pad the ridges.
Mine measures 0.622" ID

jsw