Diamond Tools

Lapwing understands that to professionals, their tools are their livelihood and having poor quality tools is problematic causing frustration, added expense, and delays. As a family-run business with core values on quality products, reliable customer service, and outstanding value for money, we are proud to offer a service unlike any other. Core drill bits, used with a drill, will remove a cylinder of material, called a ‘core’. Using a diamond core drill bit, whether wet or dry, if it’s a high-quality product, it will offer the best performance in cutting through many types of material. Lapwing is pleased to offer high-quality core drill bits as we understand the vital importance of quality tools for all of our customers.



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13 Products

SKU: BA10 (P)
SKU: ALCC-S-0 (P)
SKU: ALWC-N (P)
SKU: INX01
SKU: INM01
SKU: INB25
SKU: INB13
SKU: INNHIL3
SKU: INN56
SKU: INN65
SKU: INN55

Item out of stock - available for back order

SKU: INN66
SKU: SDT/DT15/W/O

Core Drill Bits

Types of Core Drill Bits Available


Lapwing is pleased to be able to offer a wide selection of different diamond core drill bits sizes and types to cover all areas of construction and kinds of building materials.


  • The Incision BA10 Professional Dry Core Drill bits are ideal for fast, clean diamond drilling of all building materials, such as house bricks, concrete blocks, general building materials, lightly reinforced limestone, most natural stone, and aggregate concrete. They are complete with a dust extraction barrel made from laser-welded segments and available in 15 different sizes. The diamond core drill bit is designed to cut through all materials like a hot knife through butter and our quality core bits are designed to last.
  • Our Incision Diamond Wet Core Drill Sets and accessories are built to cut with water as a coolant and lubricant, which is vital for harder materials, and are made of the highest-grade steel to protect against rust. With a wide range of sizes, types, and adaptor parts, we’re sure you’ll find what you need for your project.
  • The ALCC-S Diamond Wet Cores for Concrete are professional quality products to fit hand-held or rig-mounted use and are suitable for concrete and other product applications as well as being offered in various sizes.
  • Our Incision ALWC-N Diamond Wet Cores for Concrete are also suitable for hand-held and rig-mounted uses and can be used for all applications as well as concrete and are available in 29 different sizes.
  • ALWC-N Diamond Wet Cores for Flint Blocks and UK Telephone Contracts are Alpha Flint Wet Cores specifically designed for the UK Telephone Contract and provide an extremely fast cutting experience and prolonged wet core drilling from a shortened barrel with a range of diameters.
  • Incision Dry Core Steel Accessories are available in a range of types and different accessories suitable for dry core drilling.

Quality core drill bits, especially diamond core drill bits, the better quality of the diamonds and the parts, the longer they last and the better performance they offer. Lapwing offers high-quality core drill bits which will ultimately save you time and money.



Key Things To Look For In A Diamond Core Drill Bit


Size of the Core Drill Bit

Choosing the diamond core drill bit size that is right for the hole you need to create is important. The diameter of the core drill bit needs to be smaller than the overall size of the hole to allow the bit to move through the material. The materials you’re drilling through plus the size of the hole needed will inform the size of the drill bit necessary to get the job done efficiently and neatly. Larger core drill bits require more power to operate efficiently, so the drilling equipment needs to also be compatible.


Core Drill Bit Depth

The depth capability of a diamond core drill bit is another critical consideration. This refers to the maximum depth the bit can drill, which is determined by the length of the bit. Different projects require varying depths - for instance, deeper drilling is needed for structural analysis or reaching underground utilities, while shallower depths are sufficient for surface-level installations. It’s important to select a bit that can reach the required depth without compromising stability or efficiency. Additionally, deeper drilling may necessitate core bits with specific design features to ensure the effective removal of debris and the prevention of overheating.


Wet or Dry Drilling

Choosing between wet or dry drilling is pivotal in determining the right diamond core drill bit. Wet drilling, using water for cooling and dust suppression, is ideal for hard materials like reinforced concrete, as it prolongs the bit’s life and allows for faster drilling. It’s also better for controlling dust, which can be a health hazard. Dry drilling, on the other hand, is more suitable for less tough materials and situations where water use is impractical. It requires effective dust extraction methods but offers convenience and mobility, especially in indoor or overhead drilling scenarios.


Penetration Rate of Your Diamond Core Drill Bit

The penetration rate, or drilling speed, of a diamond core drill bit is influenced by several factors including the diamond quality, the concentration and size of the diamonds in the bit, and the bit's overall design. A higher penetration rate usually means more efficient drilling, but it can also increase wear on the core drill bit and the risk of overheating. The choice depends on the balance between speed and bit longevity. For harder materials, a bit with a moderate penetration rate but greater durability might be preferable, whereas for softer materials, a faster bit might be more efficient. Understanding the material being drilled and the balance between speed and durability is key in selecting the right bit.



Diamond Core Drill Bit FAQs


  • What is a diamond core drill bit?
    A diamond core drill bit is a specialised tool designed for drilling through hard materials such as concrete, stone, and glass. It is embedded with industrial-grade diamonds on its cutting edge, which gives it exceptional cutting power and durability. This type of core drill bit creates precise, clean holes and is typically used in construction and fabrication where precision is essential. The diamonds on the bit allow it to grind through tough materials more effectively than standard drill bits, making it ideal for applications requiring high precision and efficiency.
  • What is a core drill bit?
    A core drill bit is a cylindrical tool used to drill circular holes in various materials. Unlike standard drill bits, it removes a cylinder of material from the drilled hole, leaving a core intact. This method is efficient for creating large holes without needing to drill out the entire volume of material. Core drill bits are commonly used in construction to create openings for pipes, electrical wiring, and ventilation systems. They come in various sizes and materials, including carbide and diamond-tipped versions, to suit different drilling needs.
  • How to use a diamond core drill bit?
    To use a diamond core drill bit, start by securely attaching it to a core drill. Mark the centre of the hole to be drilled. If using a wet drill bit, ensure a water supply to the bit to keep it cool and minimise dust. Begin drilling at a slow speed to establish the hole, then gradually increase the speed while applying steady pressure. Avoid forcing the bit, as this can cause overheating and damage. Regularly withdraw the bit to remove debris and allow cooling. Ensure the drill remains straight and stable throughout the process for a clean, precise hole. If you need any additional help with selecting the right diamond core drill bit, get in touch with a member of our team for advice.
  • How to use a core drill bit?
    There are several simple steps to using a core drill bit:
    1) Firstly, attach it to a suitable drill machine. 2) Mark the drilling location clearly.
    3) Start drilling at a lower speed to create an initial guide hole, increasing speed as the bit penetrates the material.
    4) Maintain steady, even pressure – too much force can break the bit or the material.
    5) For deeper holes, periodically withdraw the bit to remove debris.
    6) If it’s a wet core bit, ensure a consistent water supply for cooling and dust control.
    7) Keep the drill steady and aligned to ensure a clean and accurate hole.

    Our expert team is always happy to offer advice and support, so get in touch today.
  • How to remove a core drill bit?
    To remove a core drill bit, first ensure the drill is turned off and unplugged. If the bit is stuck in the material, gently wiggle it back and forth while pulling it out to release it. For removing the bit from the drill, use a wrench or a suitable tool to loosen the chuck or adaptor holding the bit in place. Turn it counterclockwise until the bit is loose enough to be pulled out. Be cautious as the bit may be hot from drilling.
  • How to change a core drill bit?
    Changing a core drill bit involves safely removing the existing bit and replacing it with another. First, turn off and unplug the drill. Loosen the chuck or adaptor with a wrench or by hand, depending on the drill model. Remove the current bit and insert the new one, ensuring it’s the correct size and type for your task. Tighten the chuck or