Kids today, pfft. When I was a boy, we didn't have hot water, so we had to
bathe with the end of a steam nozzle me old man diverted from the boiler.
Sure it'd turn you red and remove some skin, but you sure did get clean!
Let me say that I do not know. I cannot give you a definite answer, but the
variables are: diameter of the tubing; copper alloy you want to bend; if
you fill the copper with sand or not; if you pressurize it or not;
temperature of the copper; type of bender; whether it is a plain one die
bender or one with a mandrel (two piece); how fast you make the bend; and a
couple of other things.
I'd Google and get some copper suppliers and people who really do this a
lot, and use their answers.
For most home repair apps, a simple bender is better than no bender. But
the technique will affect the results greatly.
Lastly, how critical of an application is this? IIRC, you did say it was
for 60 # water line. Make your radii as big as you can, even if it means
adjusting elsewhere for the bend. If you just really have to have a tight
90, buy a compression fitting or sweat a 90 on there.
Get some scrap and play with it. Realize the scrap may not have the same
properties as new, but it will give you an idea about the failure points.
I'd do it in a warm room, and not a cold garage, or outside in the snow.
Use a heat lamp or similar to warm the copper before bending.
You're catching on, Caesar! Most just don't know dookie, so have to post
something they think is funny in their impaired state of mind. There are
lots here who think because they "fix" things at home that they do it right,
but when you get to really talking to them about it, you realize that they
are just a bunch of baling wire and bubble gum repairmen who don't even know
how to properly bend a copper tube.
It may also be added that tubing bending can be improved by the use of
filler sand and pressurization to keep the outer walls pushing out. Of
course, this is only offered in the advance copper tubing bending course. I
would suggest to the OP and whoever else wants to bend copper to invest in a
good bender, or pick one up used whenever they see one. Or even make a
simple one. It makes for a much better job, and reduces failure rates.
Definitely not for the baling wire and bubble gum brigade.
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