Power Hacksaw

MECHANICAL ENGINEERING PROBLEMS:
1. Determine the time in seconds, to saw a rectangular magnesium material bar 5 inches wide and 2 inches thick, if the length of cut is 5 inches. The power hacksaw does 120 strokes per minute and feed stroke is 0.127 mm.

Solution:

Time = Length to be cut
              Cutting rate
= __________5_________________
   120 strokes/min (0.005 inches/stroke)

= 8.33 min or 500 secs    answer

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