| Hi Alan,
I think you may be asking a litle too much of this sort of machine. You might need a specialised bender like Crash recommended, because with them you can easily adjust the bend radius.
I have attached a pic of some 1/2mm sheet at 8mm apart. The sheet was hard, and would have produced a much tighter bend if it was annealed, also I didn't do any final setting up, just 'that will do'.
It depends on the length you want to make them. If fairly short lengths, maybe forming around a square bar would be a lot cheaper.
John |