Hydraulic expansion of the mandrel ( for 3 ton above uncoiler ) Pneumatic coil hold down arm ( for 1.6mm above thickness ) Double head rotation by foot pedal Features 1.Save material changing time, improve production efficiency 2.Can work with straightener. 3.Can be changed to motorized by add motor and control box. 4.With manual and hydraulic two kinds of expansion type. 5.This machine is suitable for high speed punching, such as stator, rotor and ET sheet, etc.