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Circular saw blades, either with carbide or diamond inserts, are customarily embedded in wood working machines once they permit a precise and efficient manufacturing of wooden products starting from raw-shaped solid wood chunks or laminate panels, allowing efficient processes and improving the overall industrial quality and competitiveness of the final product. However, the parameters associated with blade design must be defined with caution, aiming to avoid undesirable cutting performance and consequent relevant detrimental impacts on both processes and equipment. Thus, based on the literature, the present investigation intends to collect and gather a consistent information set regarding the effect of changes in tool design parameters on manufacturing, particularly in the case of wood machining by circular saw blades with reinforced tips. The general outlook provided aims at pointing out essential frameworks and practical guidelines for a better comprehension of the most adequate criteria to be used in the design and choice of tools for each specific manufacturing condition.

Some effects come into the practice because of decreasing quality of a cutting knife. These effects then influence the whole cutting process. The paper deals with analysis of methods for evaluation of a chain saw wearing. It is necessary to know the methods for measurement of a chain saw wearing because the tool wearing has significant influence on the whole system acting i.e. machine-tool-work piece. The measurement of wearing rate was realized to obtain knowledge about the wearing rate of cutting knives on chain saws. The goal of measurement was to design suitable methods for evaluation of wearing and definition of exactness for used methods. The exactness of used methods is evaluated according to the range of variance. The cutting knife wearing was analyzed by two methods; the results of both methods were compared. In the future it would be very effective to generalize mentioned methodology for measurement of a cutting knife wearing.