Tool life is affected mainly with

SOLUTION

Explanation:

• The sequence of parameters affecting tool life is:
• Cutting speed > Feed > Depth of Cut
• Tool life is defined as the time interval between two successive regrinds.
• Tool life represents the useful life of the tool expressed generally in time units from the start of a cut to some endpoint defined by a failure criterion.
• Tool wear and hence tool life of any tool for any work material is governed mainly by the level of the machining parameters i.e., cutting velocity, (VC), feed, (f) and depth of cut (t). 
• Cutting velocity affects the maximum and depth of cut minimum.

According to Modified Taylor’s equation:

VTnfadb = C

\(T = \frac{{{C^{\frac{1}{n}}}}}{{{V^{\frac{1}{n}}}{f^{\frac{1}{{{n_1}}}}}{d^{\frac{1}{{{n_2}}}}}}}\)

\(\frac{1}{n} > \frac{1}{{{n_1}}} > \frac{1}{{{n_2}}}\)

Cutting speed has a greater effect followed by feed and depth of cut respectively.