I didn't know concrete could be so damn hard!

[Joe Kidd]

I've drilled quite a bit of concrete in my life, but none as hard as my own. I set a Knaack chest on my garage pad(30yrs old) using 1/2" wedge anchors drilled 3" deep. I bought two Bosch blue bits and barely got four holes drilled. Those holes about beat me, even using a corded HD Milwaukee hammer drill. It must be 5K psi concrete and cured very well. Good grief!!??!!
Is this the time when one needs a rotary hammer?

 

[stihl saws]

I've been there. I had to drill 8 holes in a 1950's floor to anchor some weight lifting equipment. Dewalt 1/2" hammer drill and the same bits you used. It took two of us a couple of hours and several bits. Hardest concrete I've ever seen.

 

[Czed]

I drilled hundreds of five inch deep for 3/4 anchors for green commercial steel bins in a walmart supercenter burned one of these up i never want to do it again lol

 

[Deets066]

Hilti

 

[huskihl]

Yeah. Hilti or a Hitachi rotary hammer. 3/4" hole 5" deep in 10-15 seconds.

 

[Wagnerwerks]

I just drilled around 100 holes to cut pipes in for radon systems. Mine went well but i hope i dont have to do it again soon.