Using a punch to remove material from a strip of sheet metal or a more significant piece is known as blanking or punching. Punching means removing small pieces; blanking means removing small scrap parts and the remaining helpful portion.
Very little excess metal is spread on the parting plane during drop forging or die-casting parts production. The extra metal, referred to as flash, is removed from the part during the trimming process before it is used.
Nibbling is a particular notching where the metal is sliced with overlapping notches. Nibbling is used to create any desired shape, such as flanges or collars.
Cutting a small amount of metal from a blank is known as notching. Because the cutting line of the slug touches one edge of the strip or blank during notching, it differs from punching. Any shape can be used for notches.
Sheet/working length is the largest dimension of working distance from right to left that can be cut.
Throat depth is the distance from the centerline of the ram to the back frame in a gap frame, C frame, or similar press type