The diploma thesis deals with the problems of saw blades and their use in the processing of wood materials. The main object of the theoretical part is the saw blade as a tool, its geometry, the classification of saw blades, the description of kinematic relations in cutting, the conditions of proper use of saw blades, the methods of fixing. The last theoretical subchapter is describing means for measuring cutting power and performance. The practical part of the diploma thesis was held in Hungary at the Sopron University in Sopron. During measurments was used the measuring apparatus by Kistler including dynamometer. Its principle of measurement is based on the principle of piezoelectric sensors. A six-factor saw blade experiment was performed to determine the resulting cutting force values, compare each other and evaluate how impact had all factors on the cutting forces. Factors affecting the cutting force sizes were: type of wood (spruce/beech), sawing (counter cutting/parallel cutting), saw blade geometry (rake angle γ), the number of cutting teeth, cutting speed vc and feed speed vf.