Our dry-use diamond core drill bits are professionally engineered for dry drilling on granite, natural stone, quartz stone and engineered stone. The wokrers don't need water to cool during operation, which greatly simplifies the on‑site stone drilling work. Our diamond drilling bits are ideal for drilling faucet holes, water outlet holes and other circular openings on stone countertops, wall tiles and stone tables, etc..

Key Specifications

• Shank thread: 5/8"‑11, compatible with most angle grinders on the market;
• Available diameter sizes: Φ6mm, Φ12mm, Φ32mm, Φ50mm, Φ65mm, Φ75mm or others;
• Working length: 80‑90mm for different models or customized length;
• Dry‑drilling design, no water supply needed;

Product Advantages

1. Dry drilling performance: Work without water cooling. Perfect for working sites where water access is not available or messy water operation is not allowed.
2. High‑quality diamond segments: Sharp sintered diamond segments deliver fast cutting speed. Clean, burr‑free hole opening, less chipping on stone edges.
3. Durable black anti‑rust coating: The bit body adopts anti‑corrosion surface treatment, resisting rust and abrasion for long service life. Special textured surface enhances heat dissipation during dry drilling.
4. Stable 5/8"‑11 thread shank: Precise thread fit, firm installation on angle grinder, no shaking during high‑speed rotation.
5. Wide application scenarios: Perfect for granite countertops, kitchen counter faucet holes, sink holes, water outlet holes, stone wall hole drilling, suitable for home renovation and stone processing factories.

Operating Notes

• Use low‑to‑medium rotation speed for dry drilling. Do not apply excessive force; let the diamond segments cut naturally.
• Short intermittent drilling is recommended to avoid overheating of the drill bit.
• Mainly for granite, quartz and hard natural stone; not fit for reinforced concrete.

Photos Reference