Question: For a given milling operation, it was decided to switch from HSS cutter (cutting speed 35 m/min) to carbide cutter (cutting speed 110 m/min).

For a given milling operation, it was decided to switch from HSS

For a given milling operation, it was decided to switch from HSS cutter (cutting speed 35 m/min) to carbide cutter (cutting speed 110 m/min). The other parameters of the cutting operation in the two cases are: Cutter diameter (mm) Feed (mm/tooth) Number of teeth Carbide cutter 150 0.055 15 Calculate the following for each of the cutting tool (a) Cutter rpm (b) Feed in mm/min HSS cutter 125 0.0425 10 (c) Time required to take 200 mm long cut including approach and overtravel (d) Percentage saving in time by changing from HSS to carbide tool

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