With the same tool life, the maximum material per minute is removed by

Explanation:

• The best method to increase the material removal rate is to increase the depth of the cut, as tool life is least affected by an increase in the depth of the cut.
• If the depth of cut is increased, speed needs to be decreased for the same tool life. However, the depth of cut is also restricted by the strength of the workpiece and the amount of stock to be removed.
• An increase in feed rate has the smallest decrease in tool life in relation to the increased metal removal rate. Increasing the feed rate beyond finish requirements is not possible. Thus increase in feed is the best method, of course, within the limits of allowable finish.

Additional Information

Taylor's tool life equation:

Taylor has assumed that cutting velocity is the major parameter that is influencing the tool life, hence he established the relationship between cutting velocity and tool life called Taylor's tool life equation.

The Taylor's tool life equation is given as:

 \({{V}} \times {{{T}}^{{n}}} = {{C}}\)

where V = cutting velocity in m/min, T = tool life in min, n = Taylor's exponent 

Additional Information

The value of n for different materials is mentioned in table.