Section dedicated to ready-to-use diamond crown sets from KARL DAHM. Discover top-quality diamond crowns in perfectly matched, current set compositions.
Diamond Core Drill Sets – Powerful, Precise and Durable for Professional Trades
Diamond core drill sets are essential tools for tilers, construction professionals and installers who regularly work with hard materials such as porcelain stoneware, natural stone or ceramic. At the Karl Dahm online shop, you’ll find a wide range of professional sets – both for dry drilling without water and for highly precise wet drilling with optimal cooling management.
Thanks to intelligent set configurations, innovative technology and robust construction, Karl Dahm diamond drill bits offer the highest level of efficiency, quality and durability – even under daily jobsite conditions.
Benefits of Diamond Core Drill Sets at a Glance
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Maximum drilling precision in hard and delicate materials
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Long service life thanks to matrix coating or segmented diamond tips
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Perfectly matched set sizes for all standard applications
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Compatible with angle grinders, drills and core drill stands
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Transport cases and adapters included for optimal handling
Especially in tiling and natural stone installation, precision drilling is key – with the right core bits, you save time, effort and material costs.
Solutions for Common On-Site Challenges
Drilling into extremely hard materials
Matrixtec dry drill sets – such as Art.-No. 50840 – easily tackle even the toughest porcelain tiles. The specially developed matrix coating ensures long life and clean cuts – all without water.
Need for various diameters during daily operations
The GOLD large drill bit set (Art.-No. 50234) includes six popular diameters (Ø 20, 35, 38, 43, 50, 68 mm) – ideal for tradespeople dealing with varying material thicknesses and on-site requirements.
Fast, clean operation without water supply
For indoor dry work, the GOLD small set (Art.-No. 56203) with Ø 35, 50 and 68 mm is a compact, effective solution. M14 threads allow direct attachment to the angle grinder.
High-precision wet drilling at a professional level
The Bohrmeister Set (Art.-No. 50101) includes five high-quality wet core bits and a diamond sharpening stone – ideal for delicate surfaces where top precision matters.
Application Tips for Perfect Drilling Results
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Always drill dry with short, rhythmic pressure – allow the drill to cool briefly between cycles
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Ensure adequate water cooling when drilling wet to minimise heat build-up
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Use cooling gel (Art.-No. 50368) in dry applications to extend tool life
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The M14-to-hex adapter (Art.-No. 12134) allows bit use with standard drills
FAQ About Diamond Core Drill Bit Sets – Answers for Professional and Private Use
What is the difference between Matrixtec and GOLD core drill bits?
Matrixtec core drill bits are optimized for very hard materials. The GOLD series offers fast drilling performance and universal use, either dry or with cooling gel.
Matrixtec diamond core drill bits feature an advanced special coating that provides high durability and reliable performance on extremely hard materials such as porcelain stoneware, granite, and natural stone. The GOLD series focuses on high drilling speed and clean cutting edges and can be used both dry and with cooling gel. This makes the GOLD series ideal for users who value efficiency and flexibility in various installation and construction scenarios.
Which machines are suitable for the drill bits?
Most drill bits have an M14 thread for angle grinders; with an adapter, they can also be used with standard drills.
Diamond core drill bit sets typically come with an M14 thread, making them directly compatible with most angle grinders. If you want to use a drill with a 10 mm chuck, you can simply use a suitable adapter (e.g., item no. 12 134). This allows the drill bits to be used flexibly, depending on the available equipment.
Are the sets suitable for continuous professional use?
Yes, especially the Matrixtec and Bohrmeister series are designed for intensive and continuous use.
The Matrixtec and Bohrmeister series are engineered to deliver consistent performance even under demanding conditions. They offer high durability, precise drilling, and efficient material removal on hard surfaces. This makes them ideal for trades and construction environments requiring reliability and long tool life.
Are there sets specifically for small diameters?
Yes, for example the GOLD set item no. 50 247 includes several small diameters for precise drilling.
For applications requiring fine, accurate drill holes—such as mounting hardware or precision installation work—there are sets equipped with smaller diameters. The GOLD diamond core drill bit set item no. 50 247 includes Ø 6 mm, Ø 8 mm, Ø 10 mm and Ø 14 mm, making it ideal for exact work and clean hole edges, even on delicate tile surfaces.
Can individual drill bits be purchased separately?
Yes, all sizes from 6 to 130 mm are available individually.
Every commonly used core drill bit diameter can be purchased separately. This allows you to replace individual worn bits or expand your set later. For example, Ø 50 mm is available as item no. 50 404. Your set can remain customizable and cost-efficient.
How do I prevent the drill bit from slipping when starting the hole?
A drilling guide ensures a secure and precise start.
On smooth surfaces, core drill bits can slip when starting. A drilling guide such as item no. 50 227 stabilizes the bit at the beginning of the drilling process, so the hole is positioned exactly where intended. This is especially useful for tiles and polished surfaces and helps avoid chipping and misalignment.
What is the purpose of a diamond sharpening stone?
It refreshes the cutting segments and improves drilling performance.
A diamond sharpening stone (item no. 20 050) removes buildup and residue from the tool segments, exposing fresh diamonds and restoring cutting performance. This increases drilling speed and can significantly extend the lifespan of the core drill bit.
What drilling speed should I use?
A low speed of approx. 1,500–2,500 rpm is recommended.
Diamond tools achieve their best performance at moderate speed. Excessive speed generates heat, which can damage the cutting segments. A steady speed between 1,500 and 2,500 rpm provides optimal cutting power and extends tool life. When drilling dry, short cooling breaks are helpful to avoid overheating.
Are the sets easy to use?
Yes, the GOLD and Matrixtec series are easy to handle and provide precise drilling results.
The design of the GOLD and Matrixtec drill bits allows controlled operation without requiring excessive pressure. Even on harder materials, they create clean edges without excessive chipping. The handling is straightforward, offering reliable and consistent results during installation and construction tasks.
What is the difference between dry and wet drilling?
Dry drilling is flexible and quick; wet drilling creates cleaner edges and extends tool life.
Dry drilling allows fast and mobile work without additional equipment, but it generates heat and dust. Wet drilling uses water for cooling and dust suppression, resulting in cleaner hole edges, lower segment wear, and significantly longer tool life. For extremely hard materials, wet drilling often provides the best results.
Karl Dahm's diamond core drill sets combine workshop-tested quality, clever set combinations and rugged build for daily site use. Whether you choose Matrixtec, GOLD or Bohrmeister, you’ll find the ideal solution for your requirements at the Karl Dahm online shop.
