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Your cart is empty.Product Description
3" Diamond core drill bit is high-performance, durable tools designed for cutting through hard materials such as concrete, brick, and granite to make holes in walls and grounds.
Whether for home DIY projects or professional applications, these drill bits are built to meet rigorous demands.
Applicable Scenarios
Gardening and Landscape Design
Creating Water Features and Landscape Enhancements: Perfect for drilling into stones or bricks to create fountains or other landscaping features.
Professional Uses
Drilling Through Concrete Walls: Ideal for installing vents, drains, electrical lines and other fixtures
Home Repairs and Installations
Replacing Equipment and Pipes: Frequently used for replacing old valves or installing new systems such as sump pumps and water heaters.
Construction and Renovation
Meeting Specific Engineering Needs: Used for drilling into hard rock for the installation of safety rails or electrical conduits.
Usage Tips for dry drilling walls
Start at a 15~45 degree angle to keep from walking
- Mark the Hole: mark the hole on the wall where you intend to drill,
- you can either create a wooden guide to help stabilize the drill bit, minimizing bounce and ensuring accurate drilling,
- or use our other shorter diamond drill bits listed below to predrill a circle first
Transit the bit to a vertical angle to continue
- Wear appropriate equipment to cover your eyes nose mouth and ears from dust.
- Apply steady, even pressure on the drill and pause occasionally to let the bit cool down and clear out the dust and debristo avoid overheat or breakage.
Usage Tips for wet drilling ground or floor
Start at an angle to avoid bit walking or bouncing
- Mark the Hole, and position the drill bit on the marked spot at a 15~45 degree angle.
- Start drilling at a low speed to ensure accuracy. Once the bit starts cutting into the ground, you can increase the speed.
Bring the bit to vertical position to drill deeper
- Set Up a Water Supply to cool the drill bit and reduce dust
- If possible, use a drill stand or guide to keep the drill bit stable and ensure a straight hole.
- Apply steady pressure to the drill. Avoid pushing too hard, which can cause overheating and damage to the drill bit.
for serious tasks across hard surfaces
Diamond Core Drill Bit Key Features:
- A drilling depth of 15.74" Ideal for installations such as air conditioning pipes, range hoods, ventilation hoses, stair railings, road, and airport construction.
- Diamond Segments #35/40 grits ensure it is suitable for high-end constructions involving hard materials like cured concrete with rebar, marble, masonry, rock, and stone.
-Standard Compatibility: The industry-standard 1-1/4”-7 thread is compatible with most core drilling machines.
Mike Grippo
Reviewed in the United States on February 8, 2025
This 51mm Wet Diamond Core Drill Bit is an excellent tool for heavy-duty drilling tasks. With a 400mm (15-3/4") drilling depth and a 1-1/4"-7 female thread, it's perfect for concrete with rebar, masonry, stone, brick, and block. The diamond-coated tip ensures efficient and precise cuts, even in tough materials, while the wet drilling capability minimizes dust and heat for a smoother experience. Built for durability and performance, this bit is a must-have for professionals tackling demanding construction or renovation projects. Highly reliable and worth the investment!
Vince
Reviewed in the United States on January 6, 2025
I ordered this to drill through some cinderblock for some drain holes. This is much more stout than I expected. For the price I think it’s a good value compared to other core drill bits out there.
Mr.Quez
Reviewed in the United States on January 6, 2025
This 51mm wet diamond core drill bit offers decent performance for concrete and masonry projects, but requires careful compatibility checking. The 400mm drilling depth is impressive, making it suitable for substantial drilling tasks.Pros:• Substantial 400mm drilling depth• Wet drilling capability• Versatile for concrete, masonry, and stone• 1-1/4”-7 female thread standardCons:• Requires precise drill compatibility verification• Performance varies based on drill power• Notable wear with useBefore purchasing, critically check your drill’s specifications to ensure proper thread and power compatibility. The 1-1/4”-7 female thread is standard, but not universal. My drill was not powerful enough to use on the projects I was hoping with this bit.It is a workable core drill bit for DIY enthusiasts and professionals who need moderate drilling capabilities. Not exceptional, but reliable with proper preparation and matching equipment.
TLynnK
Reviewed in the United States on January 4, 2025
This drill bit appears as pictured and as described. This looks like a well made product that will perform the tasks it's described to do.
Travis F.
Reviewed in the United States on January 13, 2025
I’ve got a whole collection of these started now, I thought about just buying the whole kit, but didn’t really see the need to drop 200 bucks or so. They are decent quality, and they will do the trick. I like to use a good drill w these sometimes instead of the grinder, but then you gotta make sure to have the 5/8 adapter to fit the drill. Sometimes that adaptor will lock on there like you won’t believe, be advised.Here’s how I’d do a cutout, if you don’t already know how:Mark your center of your circle, grab a bucket of water and a sponge, Slap your new toy on the Milwaukee M18, and the trick is to start your cut at angles instead of trying to dig straight through. Dip the edge into the material. Practice on a scrap piece.Practice on a scrap piece.Just hold your tool at a slight angle, and I mean HOLD THAT SUMMABICH. That’s a scrap piece you’ve got right? Hold that drill like you hold that big slippery bass when he’s flipping and flapping bc that’s what that drill is gonna want to do you get going. Get one side started then get it rotated over to the other side and rock it gently til you’ve got a guide cut out in your material…it’s gonna wanna walk no matter what, so do these cuts after the homeowner is out for groceries. If you use Ryobi drills that’s ok but first go ahead and grab another scrap piece for practice bc you will crack a tile/stone eventually.When I need to make a 4 inch cut out in marble for the shower valves
Valancy Cook
Reviewed in the United States on December 5, 2024
Great quality drill bit...heavy duty and works perfectly.
Sergio G.
Reviewed in the United States on December 14, 2024
Very big and look to be well made but i must of got the wrong size because the inside it is 1 and 1/4 inch wide, meaning you need a very big center drill bit adaptor.
PugMomof3
Reviewed in the United States on November 23, 2024
finish looks nice. Will update if it craps out after 1 hole...
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