Machinability Index
Machinability index, abbreviated as Mi, a dimensionless number, is used to compare the machinability of different materials in the various cutting process.
Machinability Index Formula |
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\(\large{ Mi = \frac{ V_m }{ V_s } \; 100 }\) | ||
Symbol | English | Metric |
\(\large{ Mi }\) = machinability index | \(\large{dimensionless}\) | |
\(\large{ V_s }\) = cutting speed of standard steel for 20 minutes tool life (surface) | \(\large{\frac{ft}{min}}\) | \(\large{\frac{m}{min}}\) |
\(\large{ V_m }\) = cutting speed of material investigated for 20 minutes tool life (surface) | \(\large{\frac{ft}{min}}\) | \(\large{\frac{m}{min}}\) |