Concrete, Block and Brick Diamond Core Drilling Dry vs Wet

4/3/2017 - 10:18:27 AM

Core Drilling with Dry Core Bits vs Wet Core Bits

When core drilling, it is always best to use a Wet Core Bit.  Why?  Faster drilling, flushing out of cut, dust control, minimize binding in cut, bit lasts longer, thicker more durable wall (fewer broken segments).

So why use a Dry Core Bit?  There are times when water is simply not accessible or slurry from wet drilling is not acceptable in the environment. 
In that case, using a dry bit on a standard handheld core drill or a core drill rig is the next best choice.  A dry bit can be used on a rotary hammer drill (with hammer turned off) in conjunction with an adapter but RPM’s are typically slower and precise control over the bit while using an adapter is not desirable.  The clutch system on a dedicated core drill is preferable when core drilling vs a rotary hammer. 
Block, brick, or soft concrete are still the only recommended materials to use a dry core bit to drill.  Horizontal drilling is preferable to vertical when drilling dry because the dust is not extracted efficiently leading to slower drilling and more binding of the bit.


A dust "muzzle" can be used with a vacuum to contain the slurry from wet drilling or to contain the dust from dry drilling.

 

 

Material:

Materials

Dry Core Bits

Wet Core Bits


Soft Brick

Recommended

Recommended

Hard Brick

Usable with water

Recommended

Concrete Block

Recommended

Recommended

Concrete

Not Recommended

Recommended

Reinforced Concrete

Not Recommended

Recommended

Equipment:

Equipment

Dry Core Bits

Wet Core Bits

Angle Grinder

Do Not Use, RPM’s too high, no clutch

Do Not Use

Rotary Hammer Drill

Usable (turn off hammering)

Not Recommended

Hand Held Core Drill

Recommended

Recommended

Core Drill Rig

Recommended

Recommended



 

Depth of cut drilling wet (left) vs dry (right) in the same amount of time on identical hand held core drills into concrete.

Video of Wet Core Drilling vs Dry Core Drilling on Hand Held Core Drills.

11 comments
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Slabb-Architectural Concrete
4/19/2018 - 2:46:32 AM
It's interesting that wet core bits help with faster drilling and minimizing dust. There is construction going on across the street from me, and I've been wondering how they drill into concrete without cracking it. It's good to know that they have methods to successfully drill into it while avoiding damage to the surrounding concrete.
Liz Hudson
8/9/2019 - 12:00:24 PM
Not the same concrete bricks are used fo the wet and dry drilling. The dry drilling machine doesn't encounter a gap.
Bart
1/16/2021 - 11:12:50 AM
I am really impressed with your article and I will share this as much as it will be possible for me. Thanks for sharing. For more info :- http://www.pedleycontracting.nz/
Abigail Grant
8/4/2018 - 2:11:24 AM
I need a hole drilled in a brick wall. I'm not sure how to tell if the brick is soft or hard. Either way, it sounds like the wet core bits are the best option, as you showed in your chart. http://www.mastercutconcrete.com.au/services
Leviticus Bennett
4/25/2017 - 4:25:15 PM
If it's just the one hole you are doing your best option might be to hire a dedicated core cutting machine for the day?
I'd always go for a slightly larger core drill- the last thing you want is a hole that is slightly too small.
If you are buying a machine get the most powerful you can afford but make sure it has the safety clutch. Visit the site for more details toolsscore.com
Mitchel
12/2/2018 - 6:04:10 AM
My husband and I hired a contractor to help us finish our basement, and he recently told us that he will be doing some core drilling in our cement floor; he has given the option about whether we prefer having the drilling done wet or dry. I'm not very knowledgeable when it comes to construction, so I am curious to know which one would be the best fit for us. It's good to know that if we choose wet drilling it would be faster and it would control the dust, both are always a plus in my book! That might be the best choice for us, since we don't want to prolong the renovation any longer then we have to. http://www.accessexcavation.com.au/core-drilling
Alex Dean
5/2/2017 - 12:23:46 PM
thanks for sharing your blog Meta Therm Furnace Pvt. Ltd. is one of the best Brick Cutting Machine manufacturers
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http://www.mtf.co.in/brick-cutting-machine.html
Kiran
1/19/2019 - 5:56:24 AM
I'm really interested in this post. We used several tools for bricks for cleaning and repair. I might also consider this one helpful in some manner. Thank you.

https://schaumburgtuckpointing.com/
Christopher J. Fiecke
2/25/2021 - 12:45:41 AM
We can use the hammer drill also instead of that and it can do our work with less time.
http://bestpowerdrills.net/
Jordan Champ
9/13/2017 - 8:18:30 AM
It is interesting that you recommend using a dry bit on a standard handheld drill if access to water isn't available at the drilling site. My wife and I are considering adding a garage to the side of our house so we are trying to figure out everything we need to do that. If we need drilling, we may consider reaching out to a professional for recommendations and help. http://www.bohswelldrilling.com/drilling-services
James Borst
1/14/2020 - 8:25:04 PM
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