Answer:
Life of tool
Explanation:
The main criteria of selecting the cutting speed is the life of tool. We have to select the speed according to life of tool. Because, if we use high cutting speed and the tool does not able to withstand that high speed ,due to this machining will lowered.
From the tool life equation
[tex]VT^n=C[/tex]
We can see that when velocity of cutting tool increase then life of tool decreases.
The other parameters for selecting the cutting speed
1. Feed
2. Depth of cut
3. Material
