12pcs M14 Dry Vacuum Brazed Diamond Hole Saw - China Suppliers Factory for 6mm-120mm Tile Marble Granite Drilling Tools

Our M14 Blue Vacuum Brazed Diamond Core Drill Bits are professional-grade drilling tools engineered for precision and durability across a wide range of hard materials. Crafted with high-quality diamond particles and steel substrates, these bits feature a standard M14 thread that is universally compatible with most angle grinders on the market, ensuring easy and stable installation for both professionals and DIY enthusiasts.

Available in 32 precise sizes from 6mm to 120mm, this series covers nearly all drilling needs for home renovations and industrial projects. Each bit has a total height of 60mm with a 15mm diamond working layer, optimized for consistent drilling depth and efficiency. The striking blue coating not only enhances corrosion resistance but also allows for easy identification on job sites.

The core advantage lies in its advanced vacuum brazing technology, which creates an ultra-strong bond between diamonds and the steel body. This technology delivers 3 to 5 times longer service life than traditional electroplated bits, with industry data showing it can drill over 40 clean holes in hard porcelain tiles before needing replacement. It also ensures a high diamond exposure rate, enabling faster, more aggressive drilling while minimizing heat generation and material chipping.

A key feature is its dry drilling capability, eliminating the need for water cooling. For smaller sizes (6mm–12mm), an integrated wax core provides automatic cooling during operation, preventing overheating and extending tool life. These bits are ideal for drilling precise, chip-free holes in ceramic tiles, granite, marble, natural stone, pebbles, and concrete walls, making them a cost-effective and time-saving solution for tiling, plumbing, and masonry projects.

• Dry drilling without water feeding — 6mm–12mm bits include wax inside to help cool the bits during operation
• Wide application for drilling tile, ceramic, granite, marble, stone, and more
• Vacuum Brazed technology provides much longer working life than electroplated ones — generally 3–5× longer
• Less chipping, minimized breakage, reduced heat generation, and better finish quality
• High diamond exposure rate provides faster and more aggressive drilling performance
• Saves your money and time on every project