The stud machine is special for small size of U purlin, C purlin and so on. The purlin is widely used as the storage rack in the supermaket, the ceiling frame and the door and window frame. The stud machine use non-stop cutting system, so the speed can touch 50m/min. And two different model design can be made in one machine. That kind of design would save the cost of machine, and the space of warehouse. It has the advantage of light weight, neat appearance.Such as metal stud and track roll forming machine.