The two breast shot water wheels operate trip hammers. These are both of the “Belly Helve” type where the hammer shaft (the Helve) is lifted by the cam
No1 hammer incorporates a wooden spring beam. When a cam lobe on the cam drum lifts the hammer, it must also bend the spring beam. On release, gravity and strain energy both contribute to the hammer blow. An enormous, oak drome beam holds the structure together and damps vibration which would shake the hammer apart. The waterwheel and hammer show all the signs of having been built mostly out of timber and being progressively rebuilt to incorporate a large proportion of iron parts.
No2 hammer is heavier and has been carefully designed so that the sweet spot of the hammer falls within the anvil face. Thus reaction forces at the pivot are eliminated. Evidence suggests that this hammer was either bought second hand or bought for a different location as it has been reversed, the baseplate (foundation) suits a hammer facing the opposite direction.