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Old 02-09-2010, 09:26 PM   #1
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Drilling for tapcons


I haven't found anyone else having this problem. When pre-drilling for tapcons the bit (carbide tip) is worn out after about six holes. Is this normal? Any bits better than others? This could get expensive in bits alone!

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Old 02-09-2010, 09:32 PM   #2
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Drilling for tapcons


Is it older concrete? Using a hammer drill?
Slow the rotation speed down might help.

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Old 02-09-2010, 10:59 PM   #3
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Drilling for tapcons


Is the bit getting so hot that it turns blue?
You could be burning it out.
Try giving it the old in/out in/out.
A couple seconds of pressure, then back off.
And yes, the expensive bits last longer.
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Old 02-10-2010, 10:51 AM   #4
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Drilling for tapcons


Tapcons have their own drill bits. Is this bit you are using one that comes with the screws?
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Old 02-10-2010, 01:17 PM   #5
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Drilling for tapcons


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Originally Posted by ladanr View Post
I haven't found anyone else having this problem. When pre-drilling for tapcons the bit (carbide tip) is worn out after about six holes. Is this normal? Any bits better than others? This could get expensive in bits alone!
Sounds like you are turning the bits too fast. You should be using a rotary hammer, not a hammer drill or regular drill, they turn too fast and will just keep frying the carbide in anything tougher than cinder block.

As this is in the flooring section, are you putting down sleepers or subfloor for wood floor application. It is much quicker to attach using deformed shank drive pins, available at supply houses, than Tapcons.

Last edited by troubleseeker; 02-10-2010 at 01:21 PM.
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Old 02-10-2010, 01:31 PM   #6
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Drilling for tapcons


Recently I was involved in the "firring-out" of poured concrete basement walls at my son-in-laws house. We purchased Tapcons by the box and each box contained a single drill bit suitable for the diameter of that particular screw.

We were getting about 100 holes in the concrete (per drill bit) using a rotary hammer and were quite happy with that.
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Old 02-10-2010, 01:42 PM   #7
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Drilling for tapcons


It would help if we knew what they are doing.
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Old 02-10-2010, 01:49 PM   #8
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Drilling for tapcons


How do you guys feel about powder-actuated fasteners for framing on a basement floor?
I agree that the split drive anchors are much stronger, but after a few jobs that had change orders to the layout, I was glad to actually be able to pull up the powder actuated nails.
And come on, they're sooooo easy.

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