A substantially longer jaw life is achieved as a result of the unique jaw geometry. The centerline of crushing zone is aligned with the hinge pin center and the material to be crushed is held firmly by the straight line crushing action of the jaws. This principle uses purecompression to crush, eliminating rubbing within the crushing chamber. Double toggle action ensures crushing even on the down stroke and provides maximum mechanical advantage to the eccentric. Lighter pitman and toggles reduce inertia, and enables a greater throughput to be achieved.