A ring roller is a machine used to roll steel material by forcing the material through through rollers, also called dyes. The rollers can be adjusted to form different radii. The maximum capacity of the roller is 3/16" x 1" flat bar or 1/2" round. | A ring roller is a machine used to roll steel material by forcing the material through through rollers, also called dyes. The rollers can be adjusted to form different radii. The maximum capacity of the roller is 3/16" x 1" flat bar or 1/2" round. |