Sand making machine can be impact crusher or cone crusher according to the materiel condition and production requirement. Sand making machine is widely used for crushing materials of soft, medium and high hardness in various industries such as various ore, cement, refractory matter, mechanism building sand, etc. The characteristics of sand making machine mainly include the follow few points:1) simple structure, crushing materials by self impacting and at a low cost;2) with a particular bear installing and advanced spindle designing; 3) high reliability and high safety;4) stable to operate and with low noise;5) high efficiency and energy saving;6) big crushing ratio and little pollution.