Mathematics · Machining Calculations - Spindle Speed

Calculate the maximum spindle speed (rpm) required for drilling a 20 mm hole in a mild steel block, if the cutting speed of mild steel is 44 m/min.

Verified Solution4 OptionsUpdated: October 2026👁️1 View

12120 rpm
2350 rpm
3700 rpm✓
447 rpm

Correct answer

700 rpm

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Calculate the maximum spindle speed (rpm) required for drilling a 20 mm hole in a mild steel block, if the cutting speed of mild steel is 44 m/min.

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Calculate the maximum spindle speed (rpm) required for drilling a 20 mm hole in a mild steel block, if the cutting speed of mild steel is 44 m/min.

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