The rock crushing machine mainly used in the primary stage is jaw crusher. As everyone knows, diesel jaw crusher is a coarsely crushing machine. Besides, this kind of crusher machine is widely used to crush rock and large pieces of materials in mining smelting, building material, road, railway, water conservancy, chemical industry and so on. ... The common rock / stone / ore crushing machines are jaw crusher, cone crusher, hammer crusher, roller crusher and so on. Different crushers, feeders , conveyors and vibrating screens compose the complete crushing plant which is widely used in mineral processing, construction materials, silicate and chemical industries.