18mm M14 Gold-Brazed Dry Diamond Drill Bit

18mm M14 Gold-Brazed Dry Diamond Drill Bit (MDG106)

Professional-grade 18mm dry core designed for hard materials like porcelain, marble, granite and travertine. Gold-brazed diamond crown delivers aggressive cutting performance without requiring water. M14 threaded shank mounts directly to angle grinders; optional adapter available for use with standard 3-jaw drills.

Key features

• No water feed required – drill clean and dry on finished surfaces.
• Gold-brazed diamond crown – for fast, clean 18mm holes in porcelain & stone.
• M14 direct fit – attaches straight to angle grinders (6,000–11,000 RPM).
• Longer service life – dip in water every 30s and allow 30s cooldown between holes.
• Optional adapter – converts M14 to 3-jaw chuck drills for maximum flexibility.

Applications

• Drilling holes for pipework (18mm copper, mixer taps, shower valves, etc.)
• Suitable for porcelain, marble, granite, travertine and other hard surfaces
• Ideal for plumbers, tilers and bathroom/kitchen installers

Usage instructions

1. Mark hole position clearly.
2. Start drilling at a 45° angle to score, then bring upright.
3. Run grinder between 6,000–11,000 RPM. Do not use hammer mode.
4. Light steady pressure, let the diamonds cut.
5. Dip/cool drill bit in water every 30 seconds; allow ~30s cooldown after each hole.

What’s included

• 1 × 18mm M14 gold-brazed dry diamond drill bit

Technical specifications

Note: Not suitable for hammer/percussion. For rotary-only drilling with angle grinders or drills (using M14 adapter).