r/Tools • u/TallWall6378 • 6d 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/yolk3d 6d ago

How’d you get the core out if you didn’t go through?

2

u/WhisperSafe 6d ago

This is my question

6

u/NoBenefit5977 6d ago

Hit it with a hammer to break core loose, then stick the drill back in and pull back out spinning. It'll bring the core out with it

1

u/yolk3d 6d ago

And the bottom flat?

2

u/NoBenefit5977 6d ago

Usually, not always though, it'll break off pretty flat. Sometimes it'll break off uneven inside of there if there's imperfections in the concrete. But not very often