... typically begins with a large coil of sheet metal, between 1 in. and 20in. in width, and 0. ... to length ahead of a roll forming mill, between mills, or at the end of the roll forming line.8 ... the piece being rolled (ft), d is the distance between forming stands (ft), and n is the number ... *In some cases the limiting factor is the punching or cutoff applications.Believe and choose us, Believe your choice ...