Machinability Index

on . Posted in Project Management Engineering

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

\(\large{ Mi = \frac{ V_m }{ V_s } \; 100 }\)
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) \(\large{\frac{ft}{min}}\) \(\large{\frac{m}{min}}\)


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Tags: Welding Equations Material Equations