Impact crusher is a kind of stone crusher using impact energy. After turn on,the motor drives the rotor rotate at a high speed .When the material get into the blow bar working area,they will be stroke by the blow bar and thrown to the impact devices around the rotor.The material will come out from the discharge hole until they are crushed to the required size. The clearance between the impact rack and the rotor can adjust the size and shape of the end product.