Question
Download Solution PDFThe cutting speed of a milling cutter is 21 m/min. Find the rpm of cutter if diameter is 21 mm. (π = 22/7)
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Cutting speed:
- Cutting speed is the speed at which the cutting edge passes over the material while cutting, and is expressed in meters per minute.
- It is given by:
V = \(\frac{\pi~\times~D~\times~N}{1000}\)
Where, D = Diameter of drill (mm), N = rpm, V = Cutting speed in m/min
Calculation:
Given:
V = 21 m/min, Diameter, D = 21 mm
∵ V = \(\frac{\pi~\times~D~\times~N}{1000}\)
⇒ 21 = \(\frac{\pi~\times~21~\times~N}{1000}\)
⇒ N = 318.18 rpm
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