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Re: [TowerTalk] Concrete drill bit?

To: Bryan Swadener <>
Subject: Re: [TowerTalk] Concrete drill bit?
From: Bob K6UJ <>
Date: Fri, 28 Sep 2012 20:09:46 -0700
List-post: <">>
How about this ?   I would use a good carbide tipped masonry bit until I hit 
rebar, then use one of these bits to cut thru the rebar.


On Sep 28, 2012, at 7:20 PM, Bryan Swadener wrote:

> Hi Steve,
> I bet the folks at Northend Rental (ph: 425-745-5690) can answer your 
> question. They rent/sell tools & supplies to the construction trades.
> vy 73,
> Bryan WA7PRC
> Howdy, TowerTalkians --
> I've added anchor bolts to existing concrete bases  many times and 
> historically have rented a roto-hammer and bit. It wasn't a  concrete drill 
> bit 
> but it was sort of a concrete coring bit. But instead of  being hollow, 
> there was an inverted dome in the middle just above the cutting  blade. 
> Apparently what the dome did was to pulverize the concrete as you drilled  
> down. It would cut thru rebar with no problem and was perfect for the job. 
> Now I have to do the same thing and nobody around  here (the PNW) has 
> even heard of the bit - including the Hilti  distributor. Can someone tell me 
> what this bit was? It makes the job so easy.  Since we couldn't find the 
> aforementioned bit, we spent a lot of money on  different bits and drills 
> before we gave up and had a professional concrete  coring company stop by. He 
> used a hollow concrete coring bit and just broke off  the stuff in the hole. 
> Worked FB but I'd still like to know what I'm missing as  far as the bit I've 
> used before. Tnx.
> Cheers,
> Steve    K7LXC
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