Use: It is applicable for slitting and rolling small width drum material for film and so on. Feature: 1. It adopts up and low fixed air expansion shaft to wind. It is convenient for the user to install and discharge the rolled and unreeled materials. 2. The winding magnetic powder clutch can control its tension. 3. The master motor frequency regulating speed is equipped with a constant speed rubber traction roller to keep the slitting speed constant. 4. Equipped with a length auto counter to set auto stopping at a certain length. 5. Equipped with a flat blade and blower. 6. Part devices adopt air cylinder and pneumatic to operate. As a result it is easy for the user to operate. 7. The unreeling unit adopts a magnetic powder brake to control its tension. 8. Equipped with photoelectric rectifier, it can automatically track slit basic material side to slit precisely.