Question

1. machine trades the feed of a drill is the distance it advances with each revolution. if a drill makes 310 rpm and drills a hole 2.125 in. deep in 3.25 minutes, what is the feed? (round to four decimal places.) (hint: feed = total depth / ((rpm)×(time of drilling in minutes)).)

Explanation:

Step1: Identify given values

Total depth = 2.125 in, rpm = 310, time = 3.25 minutes

Step2: Apply the formula

Feed = $\frac{2.125}{310\times3.25}$

Step3: Calculate the result

Feed = $\frac{2.125}{1007.5}\approx0.0021$

Answer:

0.0021