Bihui 20mm - 48mm Diamond Flat-Top Conical Milling and Countersink Bit

The Bihui Diamond Flat-Top Conical Milling Bit is a professional-grade, high-precision rotary detailing tool engineered for reshaping, smoothing, and countersinking holes in dense architectural materials. Featuring a specialized conical body topped with a flat diamond face, this heavy-duty bit is highly recommended for tilers, stone fabricators, and mechanical installers. It allows operators to seamlessly enlarge pre-drilled holes, carve out custom bevels, and flatten recessed rims in porcelain, granite, and marble using a standard high-speed angle grinder.

Why Choose the Bihui Flat-Top Conical Diamond Milling Bit?

• Specialized Flat-Top Conical Profile: Engineered with a smart dual-geometric layout. While the tapered cone wall flawlessly enlarges and shapes circular openings, the flat diamond top allows the operator to square off internal hole edges, flatten bottom surfaces, or create precise, flush countersinks.

• Flawless Enlarging and Countersinking: The wide conical taper creates smooth, consistent bevels that remove dangerous tension points from raw drilled edges, drastically reducing the risk of large-format tiles cracking under stress. The flat top provides the added capability to sink plumbing valves, jet nozzles, and hardware mountings perfectly flush with the tile face.

• Premium Medium-Grit Diamond Core: Packaged with an optimized medium-grit configuration of premium industrial diamonds. The grit density balances aggressive material removal speeds with an exceptionally clean, chip-free surface finish, ensuring delicate glazes and polished faces remain unmarred.

• Vacuum-Brazed Durability: Built using advanced vacuum-brazing technology that molecularly fuses the diamond matrix to a high-tensile steel body. This professional construction method guarantees maximum resistance to thermal friction, preventing premature wear during demanding high-RPM dry milling operations.

• Direct-Fit M14 Threaded Connection: Outfitted with an industry-standard internal M14 thread that spins directly onto the spindle of a standard angle grinder, providing rock-solid concentricity and zero-wobble tracking.

• Broad Material Versatility: An indispensable detailing tool for modern, premium installations, this robust bit cuts smooth profiles across:

  • Hard porcelain tiles, sintered stone panels, and vitrified materials

  • Heavy natural stones including granite, quartzite, and volcanic stone slabs

  • Luxury polished marble, limestone, slate, and architectural ceramics

Technical Specifications

• Brand: Bihui

• Product Type: Conical Tile Milling, Beveling, and Countersink Bit

• Geometry Variant: Tapered Cone with Flat Top Profile

• Abrasive Grit Specification: Professional Medium Grit

• Manufacturing Bond: Heavy-Duty Vacuum-Brazed Industrial Diamond

• Mounting Connection Type: Standard M14 Threaded Spindle

• Operational Mode: Optimized for High-Speed Dry Milling

• Recommended Substrates: Porcelain Slabs, Ceramics, Granite, Marble, Engineered Quartz, and Masonry

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