The model of compression and shift of the seed mass between two parallel plates is considered. In this case, the motion of the layer was assumed to be stationary and small deviations from the equilibrium state in the plane perpendicular to the axis of the cylinder were considered. The degree of pressure reduction and stress growth, which affects the growth of the thickness of the rotating layer, is determined. Studied shear stress (Па) xy surface contact of seeds with saw teeth from time to time, at different values of the coefficient of rigidity (N/m) of the rubber coating. Numerical
method determined the highest value of shear stress (160 Па) with stiffness coefficients from 5 10 / м 3 k H before 25 10 / м 3 k H.