... width of 2000mm The machlnes are used for punching shear the cold crimped engine bed with the thickness ... 2000mm Material strength of 450N/mm2The specifications of punching shear are su~eyed by the bit of TB5- ... plate:if the TB TL are changed the punching shear knife is also changed;TB,TL are increased, ... is 63T lf TB TL are reduced the punching shear strength surpasses the nominal tonnage,you can reduce ...