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20-12-2022
Engineering

Answered

The taylorian tool-life equation for machining C-40 steel with a 18 : 4 : 1 HSS cutting tool at a feed of 0.2 mm/min and a depth of cut of 2 mm is given by VTn = C, where n and C are constants. The following V and T observations have been noted:
V (m/min) 25 35
T (min) 90 20
Calculate (i) n and C (ii) Recommend the cutting speed for a desired tool life of 60 minutes.

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