Used Gundlach Heavy Duty Roll Crusher, Model 3020D, Carbon Steel. (2) Hardfaced coupling mounted upper rolls 15" diameter x 18-7/8" wide configured with timing hook chisel tooth rolls, (40) chisel teeth per roll at 225rpm, (2) Hardfaced coupling mounted lower rolls 16" diameter x 18-7/8" wide configured with timing pocket continuous tooth rolls at 300rpm. Oil/air adjustment. Inlet dimensions approximate 19-3/8" x 20". Designed for processing Trona ore through 3/4" square hole screen from 3"x1" and 4"x5" feed. Rolls mounted on coupling mounting rolls. Driven by a 30hp, 3/60/230/460 volt, 1180 rpm TEFC motor. With NEMA-4X central automation lubrication system and controller. Serial #3020D-2678, built 2012.