"Dave Plowman (News)" wrote in message
...
In article ,
Alex \(YMG\) wrote:
Simple question I know, but - what's the minimum radius in which I can
expect to be able to bend a 22mm half hard copper pipe through 90
degrees, with a reasonable quality pipe bender (it has adjustable
formers)?

You'd have to explain this - all the benders I've seen have a fixed
former, and that defines the radius.

What is wrong with a spring and using your knee ?

If you anneal the copper first it will be easier .... but if you are trying
to go tighter than 90 degrees this can cause a lot of resistance