BIHUI Turbo Dry Core Bits — Fast, Clean Holes in the Hardest Tile Drilling clean holes in dense porcelain and stone without a water setup is a tall order — cheap bits overheat, glaze, and quit. BIHUI Turbo Dry core bits are vacuum-brazed, which cuts fast and resists wear, and they're rated for high-speed use up to about 11,000 RPM without overheating or delaminating. That means quick, clean holes in dense porcelain, marble, granite, and other hard stone, dry. An M14 or 5/8"-11 thread mounts them on common angle grinders or drills, so they fit the tools you already run. For a complete range in a protective case, see the 6-piece Brazed Core Bit Set, and use cooling wax to extend bit life on dry holes. Why Tile Pros Choose It Cuts fast: Vacuum-brazed diamond drills quickly and resists wear Built for speed: Rated up to ~11,000 RPM without delaminating Dry drilling: No water setup required Hard materials: Dense porcelain, marble, granite, and stone Universal fit: M14 or 5/8"-11 mounts on grinders and drills Longer life with wax: Pairs with cooling wax for dry holes Pro tip: Start at an angle to bite the surface, then bring the bit upright once it's tracking — that stops it from skating across glazed tile. Even when drilling dry, dip in cooling wax and ease off the pressure to keep the segments from burning.
