Find speed for two hours with HSS tools
Find speed for two hours tool life for dry machining of free cutting mild steel with HSS tool.
From Table 3, a value of C = 74 m/min is chosen while for HSS tool a mean value of n = 0.125 has been assumed.
V tn = C
V = C /t n
= 74 /1200.125
= 74 /1.82
= 40.67 metres/minute
Table 3: Constant C for Taylor's Equation