Recommendation For Drilling In Concrete

Winchester

I used a Milwaukee SDS max to drill about 64 holes 1-1/2" wide, 7" deep last week.

With an SDS and carbide-tipped bits is a good combo. The bits last a long time too.

It did a great job, but was very awkward to drill the holes (was a wall). Especially since most of them were waist height and lower.

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Ryan

piercekiltoff

We used one of these to bore a 10" hole through 19ft of concrete with 3/8ths aggregate & 18 more feet of gravel & sand. Took all of 25 minutes.

For that site, we were using a CP 650WS with 825 CFM & 350 PSI compressor, 25,000lbs of down pressure and 30,000 pull back.



After 37ft, we switched to a 6" tricone, drilled and cased to 358ft total depth.

It's a drill, and we drilled concrete....so, not quite off subject

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Pierce Kiltoff, CWD/PI, JKA Well Drilling and Well Pumps & Filter Supply - Map Facebook
Monroe, Washington, (360)-794-7300
Serving the Entire Seattle Area, including King, Snohomish, & Pierce Counties, WA

stp57

Yup. Water does the trick. Either dip the bit in a bucket or use a spray bottle. I get months out of my bits that way.
Steve

Colorado Fatboy

Hilti TE 6-S rotary Hammer Drill! This drill is AMAZING, I have drilled thousands of holes in a very short time and it still works like new. Absolutely effortless in concrete! NO comparison to a cordless Dewalt 1/2" hammer drill. The bits just don't burn up like they do with the other drills. I've been using the same 1/4" bit for about 2 months and I use it several times a day. If I would have known about this drill before, I would have probably saved a lot of $$ in drill bits.