Bihui 25mm M14 Vacuum Brazed Diamond Drill Bit / Hole Saw

The Bihui 25mm M14 Vacuum Brazed Diamond Drill Bit is a professional-grade, high-speed rotary core saw engineered specifically for dry drilling through the densest architectural materials. Measuring 25mm in diameter, this heavy-duty bit is highly recommended for creating clean holes for plumbing lines, electrical feeds, and robust mechanical fixings across all types of ceramic tiles, especially modern porcelain. Prioritised by professional tilers, plumbers, and electricians, it mounts directly onto standard angle grinders to deliver rapid, clean, and chip-free holes without requiring water cooling.

Why Choose the Bihui 25mm M14 Diamond Drill Bit?

• High-Performance Vacuum Brazed Rim: The cutting edge features premium diamond grains securely bonded via advanced vacuum brazing technology. This industrial-strength matrix is specialised to withstand high thermal stress, providing an exceptionally long tool life and fast penetration through hard substrates.

• Direct-Fit M14 Thread Connection: Engineered with a standard M14 female thread, this core bit spins directly onto any professional angle grinder. It is highly optimised to run at speeds up to 11,000 RPM, utilizing the machine's high velocity to slice through tiles effortlessly without the need for an adapter.

• Integrated Dust Discharge Hole: The structural body of the hole saw is engineered with a specialized side ejection slot. This layout is optimised to clear out the core plug and discharge abrasive dust during rotation, preventing clogging and keeping the cutting temperature down.

• Broad Multi-Material Utility: This robust bit performs remarkably well across a diverse range of hard wall and floor coverings, making it ideal for installing bathroom accessories, piping, and electrical brackets. It is suitable for drilling:

  • Ultra-dense porcelain tiles

  • Polished and textured ceramic tiles

  • Hard natural stone slabs (granite and marble)

  • Travertine, quartz, and heavy quarry tiles

• Optimised for Dry Cutting: Formulated to handle the extreme friction of dry drilling, this bit completely eliminates the hassle, mess, and setup time associated with wet-drilling water feeds on finished residential or commercial sites.

Technical Specifications

• Brand: Bihui

• Product Type: Dry Cutting Diamond Hole Saw / Core Bit

• Diameter: 25 mm

• Fitting Type: M14 Female Thread (Direct Angle Grinder Mount)

• Maximum Rotation Speed: 11,000 RPM

• Manufacturing Process: Premium Vacuum Diamond Brazing

• Drilling Mode: Dry Cutting Only

• Core Maintenance: Integrated Side Dust / Plug Discharge Slot

• Recommended Substrates: Porcelain, Ceramic, Marble, Granite, and Travertine

Buy online today for fast nationwide delivery across Ireland, or select Click & Collect to pick up your order directly from our Limerick showroom.