General Studies · Machining and Machine Tools
The machining time (T) for a drilling process is calculated by which of the following formulas? (Where L = Length of axial travel in mm; N = rpm of the drill; f = feed per revolution in mm)
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1T = N × f L
- 2
- 3T = L N × f✓
- 4T = L 2 N × f
Correct answer
T = L N × f
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