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Old 07-11-2011, 09:35 AM   #1
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What did i use--i can't remember the tool????????


I bored a hole in a concrete wall 15 years ago,and i made a perfect round 1
" hole.Not any burrs, smooth inside -busted out the other side, but no matter.I have looked everywhere in my tools and can't --now come up with the suitable i used before. Can you point me in the right dircetion on this, the hole is for 1" copper water line.thanks for what you may have bob s

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Old 07-11-2011, 11:19 AM   #2
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What did i use--i can't remember the tool????????


because it busted out the other side, I'm guessing you used a hammer drill. If it was really smooth probably a Quad tipped bit ( a concrete bit with 4 carbide cutters instead of the usual 2)



Or you can use a dry core bit if you want it SUPER smooth


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Old 07-11-2011, 11:52 AM   #3
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What did i use--i can't remember the tool????????


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because it busted out the other side, I'm guessing you used a hammer drill. If it was really smooth probably a Quad tipped bit ( a concrete bit with 4 carbide cutters instead of the usual 2)



Or you can use a dry core bit if you want it SUPER smooth

Does this[ bottom core bit come in sizes to fit the standard, 1/2" drill motor, and where do i find this one?At a hardware maybe? It could have also been the prior 4-cutter type.....but---- yes it was probably not drilled by me .But rather, the new furnace guys, that installed a cable thru this particular hole.No wonder i can't find these in my tool chest, theres everything else in there BUT! these

Thank you Mr Chips!! please let me know,

Last edited by bsa_bob; 07-11-2011 at 11:55 AM. Reason: wording
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Old 07-11-2011, 12:23 PM   #4
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What did i use--i can't remember the tool????????


for the size you need you should be able to find something that will fit in a standard 1/2 chuck, but for anything bigger you'll probably need an SDS, max, or spline. These core bits can be a bit pricey though, so you might want to call around and see if you can rent one if you only have a couple holes
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Old 07-11-2011, 01:02 PM   #5
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What did i use--i can't remember the tool????????


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Originally Posted by Mr Chips View Post
for the size you need you should be able to find something that will fit in a standard 1/2 chuck, but for anything bigger you'll probably need an SDS, max, or spline. These core bits can be a bit pricey though, so you might want to call around and see if you can rent one if you only have a couple holes


OK!!thank you. "good bye Mr Chips". bet you haven't heard that one to many times. aayy, bob s
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Old 07-12-2011, 03:28 AM   #6
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What did i use--i can't remember the tool????????


In addition to rent a core bit, you can buy an economical one, and pay attention if it is sharp enough.
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Old 07-12-2011, 04:32 AM   #7
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What did i use--i can't remember the tool????????


There is always the old star drill, tapped with a hammer and rotated between strikes, works very well and are inexpensive.

Mark

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