ArtMetal

I need to bend a perfect circle out of 10-20 mm rebar. I am currently trying to bend around a strong pipe welded to a piece of angle holding it in the vice.
This takes me too much time and is too difficult and takes the enjoyment out of the craft. Cannot afford to buy a tool for this and the tools they do sell are not strong enough for bending 20mm rebar. If anyone could help me out, would be well appreciated.
Regards
Dal
p.s. image is a small one to bend 12mm rebar cold. Have not yet built one for 20mm rebar. Seeking advice first.