... Factory! Our factory was founded in 1996, specializing in making all kinds of roll forming machine, and if you have special requirements, we ... large coil of sheet metal, between 1 in. and 20in. in width, and 0.004 in. and 0.125 in. thick, supported on an uncoiler. 2. The ... the distance between forming stands (ft), and n is the number of forming stands. *In general roll forming lines can run from ...