7. When drilling a hole 30mm diameter a feed of 0.15mm/rev is used. If the drill revolves at 200rev/min, calculate (i) t

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7 When Drilling A Hole 30mm Diameter A Feed Of 0 15mm Rev Is Used If The Drill Revolves At 200rev Min Calculate I T 1 (78.52 KiB) Viewed 16 times

7. When drilling a hole 30mm diameter a feed of 0.15mm/rev is used. If the drill revolves at 200rev/min, calculate (i) the feed of the drill in mm per minute (ii) the volume of the metal removed per minute (iii) the power used given that the machine is capable of removing 25cm3/min per kilowatt. Feed (F) = feed (f) x speed (N) (mm/min) (mm/rev) (rev/min) Volume removed (V) = Area (A) x Feed (F) (m) (m) (mm/min) Power = (Watts) Volume (V) Rate of removal (R)