The paper presents the results of study regarding influences of cutter inclination on the cutting force in the case of the stems (rods) of energetic willow (Salix Viminalis var. Energo). An original research method is proposed, by the means of original equipment, designed and manufactured in the laboratories of "POLITECHNICA" University in Timisoara. The experiments were made with Inger variety at controlled moisture content, 0.025 m diameter of the rods, and a special cutting device integrated in a testing system for strength of materials (Zwick/Roell Z005), which insures cutting speed constant at 0,001667 m.s(-1). Four cutter inclination levels were tested (0, 10, 20, and 30, [sexagesimal degree]). In the same time, the cutting surface quality was observed and the moisture content was controlled. The results from experiments were analyzed for determine the relationship between cutting force and cutter inclination, and, also optimal parameters. The maximum cutting force was used to drive pneumatic system design for the knife of cutting module integrated in complex equipment for sorting and packaging SRC rods in nurseries.