Study on the Testing Method of Cemented Carbide Tool : On the critical Value of Flank Wear

O.W. Boston and others have introduced a mean value of flank wear of 0.03" as a reasonable indication for the tool life. However, our experiments have revealed that the critical value of flank wear is not always constant, but it should be controlled by the kind of carbide grade, material cut, cutting condition and tool shape. Arranging the experimental data, we have proposed a summary table of the critical value of flank wear.