Question
Download Solution PDFSelect the rpm of a high speed drill of Φ20 mm to drill a plate of Mild Steel with a recommended cutting speed of 31.4 meter/minute
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Speed of the cutting tool is given by:
V = \(\frac{\pi~\times~D~\times~N}{1000}\)
V = Cutting speed (m/min), D = Diameter of drill, N = RPM
Calculation:
Given:
D = 20 mm, V = 31.4 m/min
∵ V = \(\frac{\pi~\times~D~\times~N}{1000}\)
⇒ 31.4 = \(\frac{\pi~\times~20~\times~N}{1000}\)
⇒ N = 500 rpm
Last updated on May 28, 2025
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