2007-03-03 01:13:17 · 10 answers · asked by manz66rogelio 1 in Home & Garden ➔ Maintenance & Repairs
if your looking for a nice clean hole rent a core drilling machine,be careful because if its not set up correctly you can have the machine spin on you and inflect bodily harm, if you don't use enough water you can get the bit stuck and kill yourself trying to free it ,possibly damaging the bit,,which is very expensive..if the slab is not that thick..under 6 inches and not worried that much about looks you can use a industrial grade hammer drill and drill a series of holes 3/8 inch by drawing a circle than follow the line with a series of holes than chop it out with a hammer and chisel , their is a dry core drill also but your limited to a thinner slab than a wet core
2007-03-03 01:52:59 · answer #1 · answered by John b 2 · 3⤊ 0⤋
if you want it perfect, buy 2 mason hole saws. then run it at slow speed. the reason i say 2 is your gonna ruin 1. anyway when you get down an inch or so,(remembering to lift the bit out from time to time.) you will need to use a hammer to chip away the center section of the slab. if you hit it right, itll cut itself out, but since your asking, id just use a chipper(spelunker hammer or the ball of a ball peen) to work the edges. just keep chipping.
now personally, id use a heavy hammer and pound in 1 spot square. not hard enough to crack, but hard enough to get a dibit. then id work my 3 inch diameter. in all reality the hammer diameter is like 1 1/2" then chip. hole saw is the cleanest. your also gonna need a rock crusher. if the bit stops. thats why your gonna need 2 and maybe even a 5/8 mason bit, and slow as you go. high speed cost you money.
2007-03-03 01:29:43 · answer #2 · answered by l8ntpianist 3 · 0⤊ 1⤋
Go down to the tool rental place for a hammer drill and a three inch core bit.
2007-03-03 01:39:18 · answer #3 · answered by Anonymous · 1⤊ 0⤋
Use a hole saw that is made for concrete. Run it on a heavy industriel drill. Rental yards rent this setup for the DIY.
2007-03-03 01:17:50 · answer #4 · answered by morris 5 · 1⤊ 0⤋
Rent a core drill. It's a grinder that accepts diamond bit hole saws. They're a little tricky to get started, but once you are they work well and make a nice clean hole.
2007-03-03 01:19:56 · answer #5 · answered by daffyduct2006 6 · 2⤊ 0⤋
HomeDepot Rental in the store. Rents for about $20 Cutter, stand and motor drill on it.
2007-03-03 04:00:53 · answer #6 · answered by James M 6 · 0⤊ 0⤋
get a masonry drill bit and drill it. make sure you keep a stream of water running on the hole and bit while drilling to keep it cool
2007-03-03 01:18:36 · answer #7 · answered by tom 2 · 1⤊ 0⤋
Simply: jackhammer it oversized say up to 12x12 square - set your pipe - repour new concrete back around it - dunn
2007-03-03 01:41:32 · answer #8 · answered by jacko 1 · 2⤊ 0⤋
Dynamite and a match!
2007-03-03 02:24:39 · answer #9 · answered by NubbY 4 · 0⤊ 1⤋
BUY A THREE INCH DRILL
2007-03-03 01:16:40 · answer #10 · answered by Norman T 2 · 0⤊ 2⤋