The crankshaft free precision punch press is also known as the eccentric gear precision punch press. The measurement of the functions of the crankshaft type precision punching machine and the eccentric gear type precision punching machine shows that the eccentric gear type precision punching machine has better shaft rigidity, lubrication, appearance, and maintenance than the crankshaft structure, but the disadvantage is that it is more expensive. When the stroke is long, eccentric gear type precision punching machines are more advantageous, while when the stroke of specialized punching machines is short, crankshaft precision punching machines are better. Therefore, small-scale machines and high-speed precision punching machines for punching are also in the field of crankshaft punching machines.