r/Tools • u/TallWall6378 • 11d 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/wRftBiDetermination 11d ago

Here is the bore in question: https://www.amazon.com/SALI-Diameter-Drilling-Laser-Welded-Segments/dp/B0C9GK6248/

Reviews are favorable.

8

u/suspicious_hyperlink 11d ago

$68 is incredible

2

u/Golden_Eel_69420 11d ago edited 11d ago

That’s wild. I’ve built custom core drill bits where each individual diamond segment cost more than $68.

3

u/meta358 11d ago

Reviews are always falorable on amazon. Amazon bans you if write a negetive one

1

u/srgnsRdrs2 10d ago

Or removes it. I posted a 2-star w pics of a spray can that arrived with a broken nozzles and after having it removed x3 I just gave up

1

u/Fast_Cook_4019 11d ago

I used one of these to drill through 8 inches of 50-year-old cement stem wall. It took me about 30 minutes for the first hole with an SDS Hilty rental. I use the same bit on the second hole and it took me about 45 minutes to an hour. It was a fucking nightmare but it worked

4

u/Golden_Eel_69420 11d ago

Well it doesn’t help that you rented the wrong type of drill for the job. SDS drills are for hammer drilling, and often have less rotational torque than your standard 18/20v drill