Electric rolling machine is the small type 3-roller rolling machine. The machine can bend the thin plate to round ducts. Which it is one of the most basic production equipment of HVAC. The electric rolling machine is mainly designed for processing thin plates and small diameter round ducts. The round ducts are formed through rotate the upper and lower rollers to drive the plate to form a circle. It has a pre-bending function, which makes the straight edges smaller and the roll forming effect better. The electric rolling machine standard width capability has 1000mm/1300mm/1500mm and suits 0.4-1.5mm thickness thin plates. The round rollers is solid, and the high-quality steel is processed by the grinding by the CNC lathe, polishing and quenching. The hardness is high and it is not easy to be scratched, which makes the round duct forming better.