In press formation, since the growth of removal burrs is the fastest, the time for die maintenance can be determined by the height of the burrs. Therefore, the precondition is the setting of an appropriate removal clearance, and by looking at the removed product, it is possible to judge to some extent the life of the die.

Progressive stamping is a metalworking method that can encompass punching, coining, bending and several other ways of modifying metal raw material, combined with an automatic feeding system.

The dies are usually made of tool steel to withstand the high shock loading involved, retain the necessary sharp cutting edge, and resist the abrasive forces involved.