I started this Roller Bender in 1998. The design is from the book 'The Model Engineers Workshop Manual' by Geo.H. Thomas.
I changed the design slightly (as I always seem to do
) just to make it easier and quicker for me to make. I certainly could not improve the design. 
As you can see the top roller comes off so I can get the rings.
I had to make some copper and brass rings ranging from 1.5" to 3" diameter. The material brass and copper was approx. 1/2" wide and up to 1/8" thick.
This is a copper ring made.
DaveH
I changed the design slightly (as I always seem to do
) just to make it easier and quicker for me to make. I certainly could not improve the design. As you can see the top roller comes off so I can get the rings.
I had to make some copper and brass rings ranging from 1.5" to 3" diameter. The material brass and copper was approx. 1/2" wide and up to 1/8" thick.
This is a copper ring made.
DaveH