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| Run Silent Run Deep  |
I need to drill 56 core holes in cement that are three-quarter inch in diameter and about 2 inches deep. I’m looking for recommendations for the three-quarter inch core bit. I don’t mind buying extra bits, but I’m not sure how many I will go through for the job. Reviews online tend to vary on the quality of the bed. I will be using a core drill on a stand and can do either wet or dry as it will be outdoors. Looking for a good supplier to buy the bits that are best quality. Thanks! _____________________________ Pledge allegiance or pack your bag! The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher Spread my work ethic, not my wealth | ||
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Member |
Have you looked at Hilti? Let all Men know thee, but no man know thee thoroughly: Men freely ford that see the shallows. Benjamin Franklin | |||
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Altitude Minimum |
I second Hilti! | |||
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| Ice age heat wave, cant complain.  |
I would also look at Hilti. I've found their bits to be worth the upcharge. But I've never used their core bits. NRA Life Member Steak: Rare. Coffee: Black. Bourbon: Neat. | |||
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| Run Silent Run Deep |
I did, $159.00 for one bit is steep. I was looking for any potential alternatives. Also, if one bit could do all the holes, fine but I'm not sure how many would get done per bit. Any insights on this? Thank you. _____________________________ Pledge allegiance or pack your bag! The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher Spread my work ethic, not my wealth | |||
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| Run Silent Run Deep |
Would one bit be able to do that many holes? My concern is getting the job half done and needing a new bit...so I'm not sure how may cores the bits are rated for? _____________________________ Pledge allegiance or pack your bag! The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher Spread my work ethic, not my wealth | |||
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| Technically Adaptive |
Check with your local tool rental, they rent bits and can answer questions on wear. | |||
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| His diet consists of black coffee, and sarcasm.  |
I assume you're looking for these? Masonry drills - Grainger.com Select the size and shank style you need.This message has been edited. Last edited by: egregore, "The Almighty, He put some livin' things on this earth so a man can eat." - Festus Haggen, Gunsmoke | |||
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| As Extraordinary as Everyone Else  |
3/4” diameter is pretty small. Most of the core samples I’ve taken have been 2”. Can I ask what you’re doing with them? ------------------ Eddie Our Founding Fathers were men who understood that the right thing is not necessarily the written thing. -kkina | |||
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| Member |
Check with Fastenal or Mcmaster carr | |||
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| Just for the hell of it  |
I've drilled a bunch of 3/4" holes in concrete, but always with standard SDS and SDS plus masonry bits. We used Hilti bits and a drill years ago when we had to drill a lot of holes. These days I have a Bucsh Bulldog that works fine. The key to core drilling, I have found, is keeping the bit from overheating. I would do wet. It will not only keep the dust down but also keep the drill bit cool. It can be more clean up and set up depending on where you're drilling and if the area can get wet. For holes that small, a shop vac can handle the water as you drill. _____________________________________ Because in the end, you won’t remember the time you spent working in the office or mowing your lawn. Climb that goddamn mountain. Jack Kerouac | |||
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| Run Silent Run Deep |
Thank you, good info. I can do wet as it’s out doors. Hose clean up is an option. I was thinking of going the bulldog route (hand held) but am concerned about chipping. There is anesthetic value to these holes. So I’m looking at a proper core drill rig with stand to ensure a nice clean cut. _____________________________ Pledge allegiance or pack your bag! The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher Spread my work ethic, not my wealth | |||
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| More persistent than capable |
When you acquire the bits, drill a 1x4x18” in the center, stand on each end to us as a guide to drill through for a clean hole Lick the lollipop of mediocrity once and you suck forever. | |||
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Ammoholic |
So you don't need cores? If they are decorative just us and SDS bit. If the need to look clean, do first 1" with.5" bit, then swap to .75 for the remainder. A standard SDS bit can drill hundreds of holes so it should be a lot easier and cheaper than you may have thought. Jesse Sic Semper Tyrannis | |||
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| Run Silent Run Deep |
I though about this too… Core bit to start, then switch to SDS. _____________________________ Pledge allegiance or pack your bag! The problem with Socialism is that eventually you run out of other people's money. - Margaret Thatcher Spread my work ethic, not my wealth | |||
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