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4 Bits in 2 Hours rjkerr 08-20-2006
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Posted by on August 20, 2006, 6:26 pm
Went through 4 masonry bits installing framing for windows in a
concrete foundation. Some holes were very straightforward - the bit
cut easily to the full depth. Others either immediately destroyed the
bit (remove the carbide flange) or would just not cut into the stone,
like it was hitting some aggregate that was very very hard.


Suggestions anyone? Can I use a power nailer to attach 2 x 4s to
concrete?


Posted by hallerb@aol.com on August 20, 2006, 6:31 pm
I had THAT trouble here, bought a real hammerdrill and problem went
away. apparently the aggragate in my block are extremely hard.

I dropped my Hilti out aq second floor window, it was OLD bought from a
garage sale...

ended up buying a cheapie chicago electric hammerdrill from harbor
freight, buying good bits from home depot the hammer drill type its a
breeze........

since I need the hammer drill infrequently the harbor freight one is
fine.....


Posted by Stormin Mormon on August 20, 2006, 8:38 pm
Hammer drills are just the best thing going for drilling concrete. I
wondered if he'd hit rebar.

I've heard that power nailers (the ones with the .22 blank shells)
will do nails into concrete. Never tried it, but this I've heard.

--

Christopher A. Young
You can't shout down a troll.
You have to starve them.
.

I had THAT trouble here, bought a real hammerdrill and problem went
away. apparently the aggragate in my block are extremely hard.

I dropped my Hilti out aq second floor window, it was OLD bought from
a
garage sale...

ended up buying a cheapie chicago electric hammerdrill from harbor
freight, buying good bits from home depot the hammer drill type its a
breeze........

since I need the hammer drill infrequently the harbor freight one is
fine.....



Posted by Al Bundy on August 20, 2006, 8:52 pm

> Hammer drills are just the best thing going for drilling concrete. I
> wondered if he'd hit rebar.
>
> I've heard that power nailers (the ones with the .22 blank shells)
> will do nails into concrete. Never tried it, but this I've heard.
>

THe power nailers do work. The single shot ones are good for infrequent low
volume tasks. They are only like $25.

Posted by Steve B on August 20, 2006, 9:46 pm

> Hammer drills are just the best thing going for drilling concrete. I
> wondered if he'd hit rebar.
>
> I've heard that power nailers (the ones with the .22 blank shells)
> will do nails into concrete. Never tried it, but this I've heard.
>

And they WILL do a U-Turn and come back at you if you hit aggregate or
rebar. I know. I've seen it many times.

You can't beat a roto-hammer. Even a small one like a Milwaukee. They use
a different manner to hammer and turn the bit than a hammer drill. As a
hammer drill is better than a regular drill, so is a roto-hammer better than
a hammer drill.

If you need to do any serious or repetitive drilling of holes, either buy or
rent a roto-hammer. And you don't need the jackhammer size unless you are
core drilling. There are roto-hammers made that are the same size as the
Makita and comparable hammer drills. (the larger ones)

Steve



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