Crushers NEW USED GrinderCrusherScreen. 4 days ago 20" x 10" Jaw Crusher, production up to 20 tph. The machine requires 21 GPM at 2200 psi. Jaw opening adjusts hydraulically from 1/2" to 4",and has 408 sq. of surface area. Reversable jaw plates (14% manganese steel), Designed to crush concrete, brick, block with a max size of 8" x 16".