Brief Introduction Jaw crusher machine was researched and developed in 1858 and it has the features of big crushing ratio, even product granularity, simple structure, reliable working condition, simple and convenient maintenance and economical operational costs. stone Jaw crusher is widely used for crushing all kinds of materials whose compression strength is below 320 MPa in mine, metallurgy, building material, highway, railway, water conservancy and chemistry. Main Types According to the swinging ways of movable jaw plate, stone jaw crusher can be divided into three types: simple pendulum jaw crusher, complex pendulum jaw crusher and compound pendulum jaw crusher. Jaw crusher is mainly composed of fixed jaw, movable jaw, protective device and adjusting device.