energiapiiranguga sepistusseade toorikute deformeerimiseks dünaamiliste löökide toimel; erinevalt stantsimisvasarast asetsevad sepistusvasara alasi ja raam eraldi vundamentidel (vrd stantsimisvasar), a power-drop hammer for ope-die forging; as different from impression-die (closed-die) forging hammers the anvil is separate and independent of the hammer frame that contains the striking ram and the top die (compare: impression-die forging hammer)