Engineering Excellence
Designed for Extreme Substrates & Zero-Breakage Precision
DURO vacuum brazed thin kerf diamond holesaws represent the benchmark in professional tile and stone core drilling. Engineered specifically for demanding trade contractors, tiling specialists, and industrial fabricators, our holesaws solve the most common challenges in hard material penetration: chipping, diamond segment loss, and excessive thermal buildup.
Unlike conventional electroplated holesaws that wear down quickly, DURO incorporates advanced high-temperature vacuum brazing technology. Synthetic diamond crystals are metallurgically bonded directly to a high-tensile alloy steel barrel, providing ultra-high concentration and uniform edge exposure. This allows contractors to execute clean, rapid through-holes in Grade 5 porcelain, engineered quartz, natural granite, marble, glass, and fiber cement without cracking or edge blowouts.
Technical Capabilities
Why Global Importers & Contractors Specify DURO
Built under strict ISO 9001 quality controls and oSa safety compliance for repeatable, heavy-duty site performance.
Thin Kerf Profile
Ultra-thin wall geometry minimizes friction and resistance, reducing torque demand on cordless power tools while maximizing penetration speed by up to 40%.
Integrated Cooling Wax Core
Diameters from 6mm to 14mm feature internal paraffin cooling wax that melts under drilling heat to lubricate the diamonds, enabling fast dry drilling without external water feed.
Side Ejection Channels
Larger diameter holesaws are equipped with dual side slots for rapid core removal and continuous debris evacuation, keeping working temperatures low and extending tool longevity.
Range Matrix
Technical Specifications & Machine Compatibility
DURO vacuum brazed diamond holesaws are available across a full range of metric and imperial diameters, offered in multiple fitting options for seamless integration with jobsite power tools.
| Diameter Range | Fitting / Shank Type | Cooling Method | Recommended RPM | Target Substrates |
|---|---|---|---|---|
| 6mm - 14mm (1/4" - 9/16") | Hex Shank / M14 Thread | Internal Wax Core (Dry / Wet) | 1,500 - 3,000 RPM | Porcelain, Ceramic, Marble, Glass, Slate |
| 16mm - 35mm (5/8" - 1-3/8") | M14 Thread / Hex Adaptor | Side Slot Air Flow / Wet Optional | 2,000 - 4,000 RPM | Granite, Hard Porcelain, Quartzite, Masonry |
| 38mm - 75mm (1-1/2" - 3") | M14 Thread for Angle Grinder | Dry with Dust Extraction / Wet Feed | 3,000 - 6,000 RPM | Bathroom Pipes, Electrical Junctions, Stone Slabs |
| 82mm - 120mm (3-1/4" - 4-3/4") | M14 Thread Heavy Duty Barrel | Dry / Wet Dual Purpose | 3,000 - 5,000 RPM | Ventilation Holes, Soil Pipes, Architectural Stone |
Practical Application
Best Practices for Maximum Holesaw Life
To achieve optimal hole accuracy and maximize tool life when drilling extra-hard porcelain or natural stone slabs, follow these engineered operating steps:
- Initial Angle Contact: Start the cut at a 45-degree angle to create an initial pilot groove, preventing the bit from wandering across polished surfaces.
- Upright & Orbiting Motion: Once the groove is established, bring the machine upright (90 degrees) while maintaining a slight circular orbital motion to enhance dust evacuation.
- Controlled Pressure: Allow the vacuum brazed diamonds to cut naturally. Avoid excessive axial pressure which generates counterproductive heat.
Quality Assurance & Compliance
DURO manufacturing facilities operate strictly under audited ISO 9001 quality management, ISO 14001 environmental standards, and ISO 45001 safety frameworks. As an oSa-certified producer, DURO ensures every diamond consumable exceeds rigorous safety criteria (EN 13236), delivering guaranteed consistency for OEM brand partners and global stocking distributors.
Knowledge Center
Frequently Asked Questions
Expert technical insights on specifying and using DURO vacuum brazed diamond holesaws.
Vacuum brazing forms a chemical bond between the diamond grit and the steel matrix, securing the diamond far more tightly than mechanical electroplating. This allows for higher diamond concentration, faster heat dissipation, up to 5x longer life, and vastly superior penetration rates in hard materials like Grade 5 porcelain and granite.
Yes. Smaller sizes (6mm to 14mm) contain an internal wax core that lubricates the edge during dry use. Larger sizes utilize specialized side ejection slots to dissipate heat and clear dust rapidly when paired with high-RPM angle grinders.
DURO supplies direct M14 thread connections for European and international angle grinders, 5/8"-11 thread options for North American markets, as well as hex-shank, SDS Plus, and 3-jaw drill chuck adaptors for maximum tool compatibility.
Yes. DURO offers complete OEM/ODM customized packaging, customized laser marking, barcode labeling, and tailored set configurations for high-volume regional importers, tool brand owners, and wholesale distributors worldwide.