bending roll machine custom pipe bending pipe bending BENDING ROLL MACHINE Bourgneuf industries has three bending roll machines to better serve you. The maximum tube bending capacity for the mild steel round tube is 2". The process of roll bending requires continuous form of three-point bending, where sheet metal is bent to a desired curvature on a bending roll machine. Bourgneuf's machine tools can produce both tubes and cones to your specific requirements.