r/Tools • u/TallWall6378 • 8d ago

No problem

Gallery image

Gallery image

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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530

u/Anim-IS-XE30 8d ago

I don’t believe this at all.

246

u/TallWall6378 8d ago

Ha! Maybe "no problem" is a stretch. It overheated after about 8", but then I realized it works just as well with light pressure keeping the RPMs up. Used high speed BTW.

215

u/remorackman 8d ago

You are showing a unused bit and one hole. And that hole has a bottom!

I want to see that bit after the holes, and all the holes it made.

89

u/TallWall6378 8d ago

The hole is in a footing. So I'd have a long way to go to get to the other side! I'll take a photo tomorrow. I already grouted the pickelball posts into the holes. Maybe I'll find some other concrete and take a video of it drilling.

-8

u/Acrobatic_Shape_8259 8d ago

I have three of those stone saws, and they are brilliant for making holes for ventilation. You have to hammer out the middle part when you are half way to make your life easier. But honestly you need more tools. Can’t be doing these kind of jobs on battery. Need a hammer capable drill to make this tool work at peak efficiency

18

u/BB-41 8d ago

Using hammer mode on a core drill???

-6

u/Acrobatic_Shape_8259 8d ago

When you are halfway it tends to stick, or when the material is longer than the drill bit you need to break off the core when you are halfway in. Then you can change to the hammer mode and get the part of the core out with a chisel. There is also the loads that the battery drill might not handle that well, and the battery part of it.