rock pulverizer jaw crusher with large breaking ratio. Jul 12, 2000 A rock crusher such as a cone crusher (16, 116) or jaw crusher (17) and the like to break large pieces of material, such as rock, stone and the like In order to ameliorate this wear, both cone crushers and jaw the crushed rock used in the paving materials may have a cubicity ratio of greater than 3: 1: 1.