Re: How can I bend 1" tubing?
Do you mean a mandrel or the die? You shouldn't need a mandrel to bend .058 wall tube... not for 1" dia anyway. A 6" radius would probably work for a drop loop, which isn't so tight that a mandrel would be necessary.
I've had better luck in the past with ice than with sand. You could also try cerro bend, a low-melting point metal alloy... kinda nasty stuff though... and not terribly cheap.