This paper is the result of an analytical and experimental study of the effect of the physical properties of a material on its machinability. The physical properties studied were: the total stress-strain relations; the hardness; the microstructure; the abrasiveness; the thermal properties. A variety of ferrous and nonferrous materials were selected with a large range of the physical properties. A relationship is derived by means of which it is possible to calculate the culling speed for a given tool life from the physical properties of the work material.

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