Glass and Tile Drill Bits

EXTRACUT Glass and Tile Drill Bits precision-engineered for drilling clean, chip-free holes in ceramic tile, porcelain, glass, marble, granite, and other brittle materials where conventional twist drills would cause cracking and shattering. Featuring a tungsten carbide tip with a ground spear-point geometry, these bits shear through hard, fragile materials by grinding rather than cutting — producing perfectly round holes without damage to the surrounding surface.

Key Features

• Tungsten Carbide Spear Point — Ground tungsten carbide tip with triangular spear-point geometry initiates drilling by micro-grinding rather than impacting, preventing crack propagation in brittle materials.
• No Crack Guarantee — Properly used with water cooling, these bits drill ceramic tile, porcelain, and glass without chipping, cracking, or splintering the workpiece surface.
• Diamond-Ground Tip Precision — Each tip is diamond-ground to exact geometric specifications ensuring consistent hole quality across the full product life.
• Reinforced Brazed Joint — Carbide tip is vacuum-brazed to the steel shank with high-strength filler metal, resisting tip separation under torque.
• Universal Shank Fitting — Round shank fits all standard drill chucks; select sizes include 1/4" hex shank for impact driver compatibility.
• Water Cooling Required — Must be used with water or coolant to prevent overheating the carbide tip and workpiece — simple spray bottle application suffices.

Applications

Bathroom and kitchen renovation (tile drilling for plumbing fixtures, electrical outlets, towel bars), glass fabrication (display cases, shelving, lighting fixtures), stonework (granite/marble countertop faucet holes), aquarium building, electronics (drilling PCB glass/epoxy), and any project requiring clean holes in ceramic, porcelain, glass, or stone materials.

Specifications