60mm Sintered Diamond Core Drill Bit 2pcs for Granite, Tile, Concrete

Our 60mm Sintered Diamond Core Drill is a professional-grade metal-bonded diamond drilling tool engineered for precision, long-life core drilling in stone, glass, ceramic, gemstones, and hard minerals. Unlike electroplated bits with a single diamond layer, sintered core drills have diamonds distributed throughout the full depth of the metal matrix — as the cutting face wears, fresh diamonds are continuously exposed for consistent cutting performance from first use to last. Sold in a convenient 2-piece set.

Compatible Materials

• Natural stone — marble, granite, slate, sandstone, agate, jasper
• Glass — art glass, fused glass, plate glass, stained glass
• Ceramics — technical ceramics, porcelain tile, fired clay
• Gemstones — hard minerals, lapidary stones, rough specimens
• Engineered stone — quartz composite, terrazzo, concrete

Sintered vs. Electroplated

Usage Tips

• Always use wet — water cooling prevents overheating and maximizes drill life
• Use low to medium speed: 300–1,200 RPM depending on diameter
• Apply steady, moderate pressure without forcing
• Use a water swivel adaptor for continuous flow through the hollow shank