Since the hammer of the hammer crusher is suspended by the hinge on the hammer plate, the correct selection of the hammer head quality has a great effect on the crushing efficiency and energy consumption. If the quality of the hammer is chosen too small, it may not meet the requirement to break the material once hammering. If the selection is too large, the useless power consumption is too large. Therefore, the mass of the hammer must meet the hammering once to break the material and minimize the useless power consumption. At the same time, the hammer must not be overturned backwards.

According to the principle of conservation of momentum, after the hammer hits the material, a speed loss will inevitably occur. The impact crusher needs to be improved due to structural and mechanical reasons, and the allowable speed loss of the hammer strike material varies with the size of the crusher.