The Swedish heavy Mithril has a pneumatic powered crusher, with a 140bore*120stroke FP ram there is a serious amount of power available.(about 8 ton).
It wasn't effective, due the strange shape of the beak/cutter. Even if it got under the opponent, not easy with a non floorscraping beak, the lower jaw swiveling up was a surefire way to push the opponent off.

But it could cut a 25mm piece of rebar.