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Oldtimer Oldtimer
2.5 inch
Wet bored 9 in. of concrete basement wall with an old drill.
Although I only have an old hammer drill (Hammer off) I drilled it wet. I first hammer-drilled a small hole through the wall and then ran an evaporative cooler water supply line into the inside of the basement. I inserted it inside the small hole and stuffed some foam insulation around it so that water would come out into the center of the coring bit. I then mounted a piece of particle board with a 4-in hole in it to guide the bit. It worked really well! I am 70 years old and I was drilling the hole in a very awkward position but I'm quite happy with the way it turned out. I know that the bit teeth were wearing down, as they are supposed to, because I occasionally saw a sparkle of diamond dust in the water that came out. That coring bit is tough and it has several holes left in it!
VEVOR Core Drill Diamond Dry Coring Bit 1.5" with Pilot Bit for Hard Concrete VEVOR Core Drill Diamond Dry Coring Bit 1.5" with Pilot Bit for Hard Concrete VEVOR Core Drill Diamond Dry Coring Bit 1.5" with Pilot Bit for Hard Concrete VEVOR Core Drill Diamond Dry Coring Bit 1.5" with Pilot Bit for Hard Concrete VEVOR Core Drill Diamond Dry Coring Bit 1.5" with Pilot Bit for Hard Concrete
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