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.
http://www.strongtie.com/products/anchorsystems/carbide/rebar_cutters.html
Bob
K6UJ
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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