When using crushing theories in the design of crushing machines, one must not forget the very significant shortcomings of these theories: their detachment from the specific conditions of crushing in the machine, and the inability to take into account the influence of the many factors actually acting on the crushing process and force loading, manifested directly in the working space of the crusher. ...

The main question that has to be solved in the design of any machine is the question of the forces arising in the links of the machine during its operation. The cause of force loading in crushing machines is the resistance of the material to crushing. Theories of crushing are designed to answer this basic question or to provide a quantitative estimate of the energy intensity of crushing.