Welcome to vulcanhammer.info, the site about Vulcan Iron Works, which manufactured the durable air/steam line of pile driving equipment for more than a century. Many of its products are still in service today, providing reliable performance all over the world. There’s a lot here, use the search box below if you’re having trouble finding something. Also look at the end of an article, there are helpful links to more information with every post.
The general arrangements are interesting not just for the 30C but to explain features and variants in the Vulcan product line.
The bar head type 30C shows the way the cushion, driving accessory and top plate mate to the hammer.
The bar type head was easy to connect with the leaders, but did not allow for the mechanical advantage of the sheave. It fell out of favour with the onshore hammers, but came back (with its variant, the suspension head) to be standard with the offshore hammers.
The sheave type head, standard with Vulcan onshore hammers. Frequently, however, contractors will remove the sheave and lift the hammer with the sheave pin, negating the mechanical advantage of the sheave.