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VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
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VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry
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VEVOR Core Drill Bit, 3-1/2 inch Diameter, 14 inch Drilling Depth, 1-1/4 in-7 Internal Thread, High-Precision Welding Technology, Wet Diamond Core Bit for Reinforced Concrete, Bricks, and Masonry

4.3 205 Reviews
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Features & Details

  • High Compatibility: The 3-1/2 in wet core drill bit utilizes a 1-1/4 in-7 universal thread, allowing quick and easy attachment to standard handheld drills or stand drills, providing versatility and convenience
  • Wet Driller: This diamond wet coring bit is suitable for wet-cutting conditions. It reduces heat buildup that can affect performance for an extended lifespan. It also lowers friction resistance and boosts drilling speed for efficient operation
  • Durable & Sturdy: Crafted from quality carbon steel with high-precision welding, this concrete core drill bit boasts 95HRB hardness. It resists heat buildup during high-speed drilling, avoiding blade detachment and enhancing longevity
  • High-Performance Drilling: Our core bits for concrete features precision-ground teeth for smooth, burr-free edges and faster, accurate cuts. The tooth center aligns with the installation axis, resisting wobbling or shifting during high-speed rotation
  • Wide Application: Ideal for drilling through reinforced concrete, red brick, concrete, and foam brick. This core bit is commonly used in air conditioning installations, plumbing, stair railings, highways, airports, and various constructions

Product specification

  • Item Model Number 89*350
  • Diameter 3-1/2 in/89 mm
  • Inner Thread 1-1/4 in-7
  • Max Drilling Depth 14 in/356 mm
  • Welding Method Laser Welding
  • Wet/Dry Application Wet

Reviews summary

4.3 205 Reviews
Customers say: The core drill bits are generally effective, durable, and suitable for concrete or masonry, but many users report issues with the pilot bit being too short or poor quality, affecting initial accuracy.

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Customers say
The core drill bits are generally effective, durable, and suitable for concrete or masonry, but many users report issues with the pilot bit being too short or poor quality, affecting initial accuracy.
Al-generated from customer reviews
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About this item

Product specification
Item Model Number
89*350
Diameter
3-1/2 in/89 mm
Inner Thread
1-1/4 in-7
Max Drilling Depth
14 in/356 mm
Welding Method
Laser Welding
Wet/Dry Application
Wet
Compatible Machines
Hand Drills, Stand Drills
Compatible Cutting Materials
Reinforced Concrete, Red Bricks, Concrete, Foam Bricks
Net Weight (Including Accessories)
4.5 lb/2.04 kg
Product Dimensions
16.22 x 3.50 x 3.50 in/412 x 89 x 89 mm
Description
3-1/2 Inch Wet Diamond Core Drill Bit
Made of premium carbon steel with diamond-grit teeth, this core drill bit maintains sharpness while cutting and grinding hard materials, delivering excellent wear resistance and long-lasting durability.
Our diamond wet coring bit enables fast cutting in wet mode, which provides cooling and lubrication to reduce wear, extending drill life, and minimizing dust for cleaner operation.
Crafted with high-precision welding for excellent wear resistance and high-temperature stability, this concrete core drill bit keeps diamond teeth strong and secure under tough drilling conditions, minimizing tooth loss or detachment for long-lasting durability.
These core bits for concrete are simple to install and operate, even for beginners. Ensure the drill bit is straight and aligned with the hole wall during use for optimal performance and results.
The core bit ensures clean, precise holes in tough materials like red bricks, concrete, and foam blocks. Suitable for all your drilling needs in construction and renovation projects.

3-1/2 Inch Core Drill Bit with 14 Inch Drilling Depth for Jobsite Use

This 3-1/2 inch core drill bit is designed for professional drilling tasks where precision and depth are crucial. With a 3-1/2-inch diameter and a full 14-inch drilling depth, it can drill deeply into walls and floors without stopping or moving much. For structural, HVAC, plumbing, and construction projects that require core holes to penetrate thick concrete and masonry layers, this depth is especially useful.


This VEVOR wet core bit maintains consistent cutting performance, unlike shallow bits that struggle on reinforced surfaces. Whether you're drilling for ventilation setups, wiring lines, or pipe routing, the bit's deep reach expedites and streamlines the process. Additionally, it helps ensure that the cuts are consistently round.


1-1/4 in-7 Internal Thread for High Compatibility and Fast Attachment

Connecting this 3-1/2 inch core drill bit to various drilling machines is simple thanks to its 1-1/4 in-7 universal internal thread. You can use it in any drilling situation thanks to its universal fit, which makes it easy to install on standard handheld or stand drills. When you need to switch tools on the job site, this thread design lets you set up more quickly, making a big difference.


Since it easily attaches to most conventional drilling equipment, you don't need any additional adapters for most rigs. It facilitates the switching between various drill methods used by contractors. Whether you're using a stand drill for heavy tasks or drilling indoors in confined spaces, the compatibility ensures your workflow remains seamless.


Wet Drilling Design Reduces Heat and Boosts Drilling Speed

Because of its design, this diamond bit is ideally suited for wet cutting applications. Wet coring reduces friction resistance while drilling. It facilitates cutting and makes the bit's passage through difficult material easier. Additionally, it speeds up the drill, which is particularly useful when drilling dense brickwork or reinforced concrete, where dry drilling would quickly slow down.


Additionally, wet cutting helps prevent components from overheating, a primary cause of rapid wear. Heat control prolongs tool life and maintains consistent performance. This wet diamond core bit is an excellent option for difficult, repeated tasks, as it produces cleaner cuts, runs more smoothly, and lasts longer.


Carbon Steel Strength & High-Precision Welding for Long Service Life

For concrete drilling, this core bit’s durability is critical. Because of its premium carbon steel construction and high-precision weld reinforcement, the cutting structure remains robust even under heavy drilling. Additionally, the bit's 95HRB hardness makes it extremely resistant to wear and distortion during high-pressure cutting.


When drilling cores, a common issue is blades breaking off; this construction helps prevent it. Because the bit is designed to withstand heat buildup even at high drilling speeds, the cutting segments remain in place longer. This results in reduced downtime, fewer replacements, and safer work, particularly when using reinforced building materials.


3-1/2 Inch Core Drill Bit Precision-Ground Teeth Deliver Smooth, Burr-Free Holes

Tooth design is critical for achieving clean drilling results. The teeth on this type of concrete core bit have been finely honed to increase cutting stability and precision. As a result, the edges are free of burrs, and overall drilling performance improves. Clean holes facilitate the installation of pipe fittings and mounting; this feature is crucial for installation operations. Instead of rough, chipped edges, you get a cleaner, more polished surface.


Additionally, by making it simpler to cut through the material, this exact tooth shape expedites drilling. Whether you're drilling into foam brick, brick buildings, or concrete walls, the teeth allow you to make fast cuts while maintaining control. It is designed for contractors who require a single bit that is both efficient and aesthetically pleasing.


Tooth Center Alignment Prevents Wobble During High-Speed Rotation

Wobbling is one of the biggest risks when core drilling. It may result in faster wear and less precise holes. The tooth center and the installation axis are aligned in this 3-1/2 inch core drill bit. It maintains the bit's stability during operation. Even when things are whirling rapidly, this alignment prevents them from swaying or shifting. The user gains more control and accuracy as a result.


Because shifting can cause holes to become uneven or damage neighboring buildings, this stability is particularly helpful for deeper coring projects. Better alignment keeps the drill bit balanced and produces more reliable results. When drilling hard materials like reinforced concrete, this results in reduced vibration, smoother drilling, and improved performance.


Wide Application for Concrete, Bricks, HVAC, Plumbing & Construction

This wet diamond core bit is designed for use in real world construction. It can be used for a variety of tasks because it is perfect for drilling through concrete, foam brick, red brick, and reinforced concrete. It can handle tough drilling surfaces without losing cutting power, whether you're doing home improvements or working on a large job site.


This component is frequently used in the installation of air conditioning, plumbing, stair railings, highways, airports, and other construction projects. Its broad range of applications, including drilling structural holes for rail fittings and running pipes through concrete walls, makes it a useful tool for professionals who want reliable performance across a variety of tasks.


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