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Old 04-25-2015, 02:47 PM   #1
Clodfobble
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What I wonder about is the noise. In the movies, they're always careful to fill that plot hole with "construction in the area" or "over a weekend when no one's there." How did they drill three holes that big with no one hearing?
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Old 04-25-2015, 03:30 PM   #2
xoxoxoBruce
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The movie plots have them breaking up the concrete with jackhammer type tools, which makes a lot of noise. This was taken out in three plugs with diamond rimmed hole saws. I've seen 8 inch in use and I'm sure they make much bigger. It's not all that noisy, but takes a lot longer, and they require water for cooling and to wash the cut dust out. I have several half inch ones for drilling glass.
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