Drill Penetration

MECHANICAL ENGINEERING PROBLEMS:
1. Compute for the dill penetration in inches/minute when a drill turns at 1200 rpm and the feed of 0.005 inches per revolution. The given material is steel.

 Solution:

For drill penetration = feed rate * rpm

= (0.005 inches/rev * 1200 rpm)

= 6 inches per minute     answer

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