Name given to the heavier types of water powered forging hammer. The helve is the main beam of the hammer pivoted at the tail end, with the hammer head or tup at the nose. Helve hammers can be 'belly helve' where the hammer is lifted at the mid point of the helve beam, while a 'nose helve' is lifted from in front of the tup. Both wortley top forge hammer and the surviving Low forge hammers are 'belly helve' type. Lighter hammers tended to be 'tail helve' being lifted by a cam pushing down behind the pivot.