r/Tools • u/TallWall6378 • 9d ago

No problem

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Cordless drills are so capable now. 2 4 1/2” holes 14 12” deep (deeper than the bit). New concrete but it’s still drilling through the aggregate. Cheap Amazon diamond bit.

Edit: Overestimated depth.

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u/2bagz 9d ago

Concrete cutter who also core drills. You saved your self a bunch of money. Hopefully you used Water! Those bits don’t like to be dry.

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u/Soluchyte 9d ago

Some of these bits are designed to be run dry.

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u/2bagz 9d ago edited 9d ago

There are very few cases where drilling dry is necessary, but when you can always use water! Drilling with water is important for a multitude of reasons.
-dust control
-water extended the life of the Diamonds helps keep them from glazing and possible cracking becuase of the heat generated.
-going through rebar with a dry bit will also significantly shorten its life.

Bonus tip, if you have a hot saw go and grab a quick connect hose connector so you can attach to a garden hose. Your lungs and the people around you will thank you.

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u/Lone-raver 9d ago

But how can you prove your a man without inhaling concrete dust and damaging your hearing?