Bosch Hole Saw HDG12 1/2 Inch (Vacuum Brazed Diamond Grit 1 Inch Cut Depth Hex Shank PEI 5 Porcelain Granite Ceramic Tile Wet Drilling)

Bosch HDG12 1/2-Inch Vacuum-Brazed Diamond Hole Saw

The Bosch HDG12 1/2-Inch Vacuum-Brazed Diamond Hole Saw is a wet-cutting masonry accessory engineered for core drilling through dense PEI 5 porcelain, granite, marble, and ceramic tile. Featuring a 1-inch maximum cutting depth and a hex shank compatible with the Bosch Quick Change universal system, this 1/2-inch diamond bit utilizes a segmented tooth rim with high-grade diamond grit. Built to operate exclusively with wet-sawing equipment on GFCI-protected circuits, this precision core bit solves surface cracking, heat fracturing, and slow drilling challenges when mounting bath fixtures and anchors on hard stone surfaces.

Best Used For:

• Porcelain & Granite Anchor Mounting: Drilling clean 1/2-inch anchor pilot holes through PEI 5 rated porcelain tile and natural granite shower walls.
• Plumbing Supply Line Rough-Ins: Coring smooth, chip-free penetrations in ceramic tile and marble backsplashes for small water line feeds.
• Stone Veneer & Countertop Fixture Anchoring: Penetrating hard stone surfaces up to 1 inch thick to mount bathroom hardware and glass enclosure brackets.

Key Performance & Safety Features

• Vacuum-Brazed Diamond Grit: High-strength brazing process permanently bonds industrial diamond particles to the core rim for faster cutting speeds in hard stone.
• Segmented Tooth Profile: Specialized rim slots channel water directly to the cutting edge to flush out slurry and reduce friction heat buildup.
• Bosch Quick Change Compatibility: Hex shank snaps directly into the Bosch Quick Change universal arbor system for fast, tool-free bit swaps.
• Rapid Core Plug Removal: Side ejection ports allow operators to remove dense stone plugs quickly between drilling passes.
• 1-Inch Cutting Depth Limit: Shallow core barrel geometry provides rigidity and prevents lateral deflection during delicate tile starts.

What's Included

• (1) Bosch HDG12 1/2 in. Vacuum-Brazed Diamond Hole Saw

Technical Specifications

Pro-Tip: Start your hole at a 45-degree angle with a steady water feed to create an initial crescent groove before slowly bringing the hole saw perpendicular to the tile to prevent bit walking.