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1" coring bit for 3/4 porcelain tile

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1" coring bit for 3/4 porcelain tile

Old 10-20-2019, 09:35 AM
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Default 1" coring bit for 3/4 porcelain tile

I have a bunch " over 20 " holes that need to be drilled in a porcelain tile over 2" of concrete patio. If you have any suggestions or experience with something like this feel free to post up. I am borderline thinking of tossing in the towel on this one. Having difficulty locating a rental shop with a 1" diamond coring bit.
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Old 10-20-2019, 09:38 AM
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Pay the experts!
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Old 10-20-2019, 09:46 AM
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I can hand the drilling off to someone else but I still need to be on sight to locate the holes. There is more to it once the hole gets drilled
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Old 10-20-2019, 09:51 AM
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Glass bits
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Old 10-20-2019, 09:51 AM
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Are you trying to create support under an existing patio for bearing or to stabilize?
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Old 10-20-2019, 10:12 AM
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Originally Posted by skibum View Post
Are you trying to create support under an existing patio for bearing or to stabilize?
no, they are anchoring points for a cover
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Old 10-20-2019, 10:15 AM
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Any good diamond hole saw will work. Light pressure and water.
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Old 10-20-2019, 10:25 AM
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Here's one from Grizzly. It's not a coring bit per se but it could work for you.

https://www.grizzly.com/products/Gri...-T10538/T28008
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Old 10-20-2019, 10:39 AM
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Originally Posted by skibum View Post
Pay the experts!
My only concern with that route is, will they guarantee no cracks??? Not likely? Sooo, if cracks are possible I'd just as soon do the drilling and that way if cracks happened by that far outside chance I won't be as pissed off because I didn't pay large to have the holes drilled.


OP - I'm assuming you're thinking of drilling the holes with a rented core bit drill not a hand held? I know I would be....and one that flows water as well.
Being porcelain tile, talk with any ceramic tile retailer that sells porcelain tile, they should know where to buy in your area. Also the rental shop that you rent your core bit stationary drill should also rent the bits or at least sell them
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Old 10-20-2019, 10:51 AM
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Originally Posted by mikefloyd View Post
Any good diamond hole saw will work. Light pressure and water.
We tried a lenox 3/4 diamond bit and it took about 10-15 minutes for one hole without factoring in the cement and hidden pavers under the concrete. $27 per bit and not sure how many holes I would get out of each bit. Then we decided to go up to 1" because we thought it would be easy to find a coring bit in that size and might be able to get the job done with one bit but we are not having any luck with rental shops stocking a 1". They have plenty of larger bits just not the small ones.
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Old 10-20-2019, 10:57 AM
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Originally Posted by Garett View Post
My only concern with that route is, will they guarantee no cracks??? Not likely? Sooo, if cracks are possible I'd just as soon do the drilling and that way if cracks happened by that far outside chance I won't be as pissed off because I didn't pay large to have the holes drilled.


OP - I'm assuming you're thinking of drilling the holes with a rented core bit drill not a hand held? I know I would be....and one that flows water as well.
Being porcelain tile, talk with any ceramic tile retailer that sells porcelain tile, they should know where to buy in your area. Also the rental shop that you rent your core bit stationary drill should also rent the bits or at least sell them
Yes I have one on hold for Monday and they did have a 1" bit but the diameter was "really" close to the size pipe we need to install in the hole which is less than one inch. Thinking maybe the bit is extremely worn.
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Old 10-20-2019, 11:17 AM
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Rent a Hilti core rig with vac base from Home Depot but buy a new core but if possible directly from Hilti.

Other option.

Get a 2’x2’ piece of 3/4” plywood and drill a 1” hole in the middle of it. Position the hole where you need it stand on the board and use one of these to drill. They make extensions for the bits if you need to go deep.
https://www.contractorsdirect.com/Pearl-Abrasive-P3-Wet-Core-Bits?custcol663=6
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Old 10-20-2019, 11:31 AM
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Originally Posted by bjm9818 View Post
Rent a Hilti core rig with vac base from Home Depot but buy a new core but if possible directly from Hilti.

Other option.

Get a 2’x2’ piece of 3/4” plywood and drill a 1” hole in the middle of it. Position the hole where you need it stand on the board and use one of these to drill. They make extensions for the bits if you need to go deep.
https://www.contractorsdirect.com/Pearl-Abrasive-P3-Wet-Core-Bits?custcol663=6
Thats the drill I was going to use from the rental place. I went to HD but their bits started around 1 1/2" and there was nothing in the store that could be purchased. Ill call around on Monday to see if I can find a new bit to use .

Last edited by Mine Now; 10-20-2019 at 11:40 AM.
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Old 10-20-2019, 11:39 AM
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Not so funny, I just bought a 1" diamond core bit with 5/8 arbor and ended up not using it. You're drilling about 2-1/2 inches deep?

This:
Amazon Amazon

Last edited by airbrush; 10-20-2019 at 11:45 AM.
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Old 10-20-2019, 11:57 AM
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Go directly to Hilti and purchase.

https://www.hilti.com/c/CLS_POWER_TO...emCode=2076512


they may eveb have a store store in your area as long as you aren’t in the moon
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Old 10-20-2019, 11:58 AM
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9"? Going for oil?
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Old 10-20-2019, 11:59 AM
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It might be cheaper to get an installer of pool kiddy fences to drill those holes.
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Old 10-20-2019, 12:56 PM
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Go to any granite supply house and buy the bit.
chuck it in a variable speed makita angle grinder, grab a tile sponge and a small bucket of water and go for it.
Get the speed right, keep it wet and done.
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Old 10-20-2019, 03:54 PM
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I bought a "mini" core drill bit in Home Depot last month, it was 3/8" diameter but I think they have bigger sizes. I used it to make holes in the porcelain tiles in my patio in order to install anchors for accordion shutters as part of preparation for hurricane Dorian. I can't remember the brand, it was red so probably Diablo or Milwaukee, you spray a little bit of water and works pretty good thru the tile.
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