Mathematics · Drilling Speed and Material Removal Rate
A 40 mm diameter, 50 mm deep hole is drilled in a mild steel plate. Cutting speed = 65 m/min and feed = 0.25 mm/rev. Determine the approximate machining time and material removal rate (MRR).
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Time = 1.00 min, MRR = 220 cm3/min
- 2Time = 0.75 min, MRR = 200 cm3/min
- 3Time = 0.50 min, MRR = 163 cm3/min✓
- 4Time = 0.25 min, MRR = 100 cm3/min
Correct answer
Time = 0.50 min, MRR = 163 cm3/min
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