Feed rate

The feed rate of a drill is the distance it advances with each revolution. If a drill makes 320 rpm and drills a hole 2.625 inches deep in 1.8 minutes, what is the feed rate?

Correct answer:

r =  0.0046 inch

Step-by-step explanation:

v=320 rpm t=1.8 min  n=t v=1.8 320=576  h=2.625 inch  r=h/n=2.625/576=0.0046 inch



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