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Question

During a conventional milling operation, if depth of cut gets doubled where as the cutter diameter reduces to half, then what will be the percentage change in maximum uncut chip thickness ?

A
0 %
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B
50 %
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C
100 %
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D
200 %
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Solution

The correct option is C 100 %
Maximum uncut chip thickness,
t=2ftdD
Where, ft is the feed per tooth of the cutter that is, the distance the workpiece travels per tooth of the cutter, in mm/tooth
Where, d = depth of cut,
D = cutter diameter
So, tdDt2t1=2dD/2×Dd=4t2t1=2t2=2t1
Percentage change
=t2t1t1×100=2t1t1t1×100=100%

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