Breakage of wheat grain during first break roller milling depends on the characteristics of the wheat (including the distributions of kernel size, hardness and moisture content) and on the design and operation of the roller mill (including roll speeds and differential, roll disposition, fluting profile, number of flutes, fluting spiral, roll gap, the degree of roll wear and the feed rate). The effects of these factors are manifest in the particle size distribution exiting first break, the compositional distribution of those particles (as large particles tend to be richer in bran, while small particles are pure endosperm), the power required to mill the wheat and the rate of roll wear. For this research, was used a new designed micromill which can perform in the grinding process of the wheat and of the middling too, in the same conditions as in the milling industry. The micromill is used to determine the grinding resistance of the cereals. The method has the same accuracy as the classical one and it has the advantage to be quicker and less demanding as work volume. The assessment of the grinding resistance in the wheat breaking process is related to the settings of the milling equipment which can lead to a diminuate total energy consumption, in the milling process.