For a comparative assessment of the effectiveness of various types of grinders of grain
materials, various approaches are used. As the main criterion, the correspondence of the crushed
material according to the particle size distribution can be taken as an indicator of the reliability
of the grinding process. A comparative assessment of rotary crushers is carried out using the
technical and economic indicator Eg, which is the ratio of total costs to the implementation of a
given amount of work. Under the reliability of the grinding process, we have accepted the
condition that the particle size distribution will comply with the requirements for agricultural
feeding animals, which is possible while maintaining a rational gap between the stator and rotor
riffles. The contradiction manufacturing techniques for the experiment are divided into: option
No. 1 – steel 3 (HRC 10–12), option No. 2 – steel 45 (HRC 15–17), option No. 3 – hardened steel
45 (HRC 45–50), option No. 4 – steel 45 hardened and having a thin-film coating of FPH (finish
plasma hardening), microhardness of 13 GPa. If reliability of the grinding process equal to 80%,
wear on the fourth option, the cost was 1,171 rubles per ton, which is 16% lower than the cost of
the first version of the production of a rotor crusher equal to 1,405 rubles per ton, respectively,
this all speaks of the possible use of the proposed options for various forms of ownership of
agricultural enterprises