the effect of increasing the cutting speed from
V
1 to
V
4 using four newly sharpened tools of identical geometry operating under identical cutting conditions of feed and depth of cut. The corresponding cutting
T
1,
T
2,
T
3, and
T
4 for reaching the allowable flank wear
V
Ball
for each cutting speed are plotted in Figure 4.8. Plots of log
T
against log
V
are shown in Figure 4.9. Taylor produced the empirical tool-life equation, which can be