The mass of flywheel will incline as the punch speed inclines; it will decline as radius inclines. It would incline when the punch mould mass inclines. So it is chosen that big radius and small mould mass for saving cost of material and machine. The biggest mass of flywheel is about 10Kg at 0.1m of radius and 7Kg of piston at the time of 0.06s and crank length R=75mm and linkage length L=255mm. So it is important for us to choose the piston mass. If it is 5Kg the biggest one will 10Kg at the time of 0.06s and crank length R=80mm and linkage length L=245mm then choosing crank length is second factor.