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Chapter 1: Q27E (page 1)

According to the shop manual, when drilling should have a 12.7-mm-diameter in wood, plastic, or aluminum a drill should have a speed of 1250 rev/min. For a 12.7-mm-diameter drill bit turning at a constant 1250 rev/min .find

a) the maximum linear speed of any part of the bit and

Short Answer

Expert verified

the maximum linear speed is 0.831ms.

Step by step solution

01

Step:-1 explanation

the determinant of the drill bit D=12.7mm11000mm.

=12.7×10-3m

The radius of the drill bit is,

r=D2=12.72×10-3m

=6.35×10-3m

Now, the Angular speed of the drill bit,

ω=1250revmin2πrad1rev1mint60s

=1253πrads

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