View Full Version : Hole saw for concrete?
12-19-2008, 02:08 PM
Need to get some hole saws and a drill for making holes into concrete or brick. I'm going to be using this for linesets and to make holes in chimmenys for chimmeny liners. Any suggestions?
12-19-2008, 03:42 PM
Rotary Hammer or the more expensive option of a wet or dry core drill.
12-19-2008, 04:07 PM
I got the hilti core saw last year. DD-130 i think it was. I found it used on ebay for cheap. I fot a 4", 3.5" and 2.5" bits. It is great compared to drilling with a percussion drill which I did for years. Just take a good wet dry vac with you when you are using it. I did not get the stand for it and I have no problem holding onto it.
12-19-2008, 07:33 PM
Man I hear that. My arms look like Popeye's when I get done blasting a hole in concrete with my DeWalt 5hp rotary/hammer tool.
12-19-2008, 08:03 PM
From Grainger, 4" holesaw blade, ~0.4 kilobucks each.
12-20-2008, 11:53 AM
I found wet core bits for much less than that. I think it was through Midwest diamond. I spent for the whole package, drill from ebay, 4 bits with adaptors, less than 1500$ dollars.
12-20-2008, 02:00 PM
Had Bosch with dry core bits 2 and 3 inch. Someone liked it better than i did and stole it.
Just got a Makita and holy cow is it much much nicer. Doesnt beat me and the 2 inch eats solid concrete likle butter. The 2 1/8 i believe is the perfect size for a 2 inch flue. Found the drill motor for 570.00 and the bits were 260.00 Get the extension chuck for it and the adapter to sds plus. The bits for the sds max are more expensive , the adapter is 50 bucks. You will thank yourself and wonder why you waited so long , havent hit my hand in years.
12-20-2008, 02:22 PM
I got a weka 3 speed hand held it ran about 1200 4 years ago
I use a 7" bit "only for brick
I use a 5" for dryer/fan light combos
anything above 3" I use 1st gear, its slow going but you need the torque for the bigger bits
you can get a stand for around 5 1/2
I got mine at hughes supply
12-21-2008, 09:07 PM
Ive got a Metabo grinder with an adapter that I purchased seperatly to go with diamond core bits. Ive got a few diiferent size bits. I prefer the grinder over every hammer drill that Ive ever used. It makes very quick work on the holes.
02-01-2009, 04:44 PM
Blue Boar makes damond core bits with laser welded diamond cutting segments that are designed for cutting dry and hold up to the heat generated when used with a high speed right angle grinder. What is really nice is that they come in the usual sizes but also in 2-5/8" and 3-5/8" for making holes for 2" and 3" PVC for condensing furnaces. I bought mine online at www.holecutterstore.com and the prices were surprisingly low.
02-01-2009, 04:55 PM
depends how big of hole you want..anything over 4" that is block we use a hammer drill and concrete bit..go around and around the block will eventual fracture between the holes..sometimes needs encouragement. if you are careful you should not get any errant cracks. after installing the pipe of whatever seal between the pipe and hole or use a storm caller to make it somewhat pretty. if its a solid concrete floor or wall over 4" we hire in a company that specializes in concrete sawing and core drilling
02-01-2009, 09:06 PM
This is what you need:D
got one for christmas, and i absolutely love it lol:D
02-01-2009, 09:51 PM
will that drill do 2' and 3" holes?
02-01-2009, 10:02 PM
will that drill do 2' and 3" holes?
I havent tried it yet, but it is rated up to 3''. The power this thing has i dont see any reason it couldnt do it lol. It also has a lifetime warranty, the most you will have to pay is 30% of the full cost of the drill if anything were to go wrong with it.
02-01-2009, 11:02 PM
Rented a wet diamond core bit and drill for 3" holes through poured wall. With just a power cord and a hose, it went beautifully. The drill weighed more than me and I held it no problems, very smooth, very clean.
08-06-2009, 01:38 PM
I like the Bosch SDS plus roto hammer (http://www.valutool.com/bosch-power-tool-sds-plus-roto-hammer-p/11239vs%20roto-hammer.htm) better. I like the RPM rating. It's about 300 more per min. then the hilti. Bosch has the 3 year warrenty and it's well over $100 cheaper. Besides Bosch is the one who invented the elec. hammer.
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