Abstract
Instruments for the evaluation of the surface finish of a machined part are sophisticated and costly, so theoretical equations which can predict approximately the magnitude of surface roughness under given cutting conditions are required. An analytical study of the roughness on surfaces turned by a singlepoint tool is presented. The effect of tool wear is also taken into account. A new technique is proposed by which the level of finish, conventionally obtained through a finishing cut after a roughing cut, can be improved. Alternatively, this technique, which is based on the principle of overlapping of cuts, can reduce the machining time in comparison with that required for the conventional roughing and finishing cut method to achieve a desired level of finish.
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