Pro Build 77mm Diamond Lapidary Drill Bit Core Saw Tool For Gemstone Jewelry Making With Heavy Duty 10mm Shank Designed For Quick Stone Cutting And Smooth Rock Polishing Jobs
✔️ 77mm OD x 10mm shank cuts hard stone quickly and cleanly
Pack of one single heavy duty lapidary drill bit built for slicing gemstones, jasper, agate, and tempered glass. This electroplated diamond core saw stays handy in home workshops, jewelry maker benches, and custom stone carving stations where precise circular cuts matter.
✅ External diameter measures 77mm for wide hole cuts✅ Inner opening sits at 75mm to save material on thick slabs
✅ Fits standard 10mm power drill chucks with zero wobble
✅ Ultra thin 0.7mm rim keeps kerf narrow and dust minimal
✅ Overall tool length hits 55mm with a 20mm max cutting depth
💡 What makes diamond core drill bits handy for drilling hard lapidary slabs and fragile glass?
Diamond core saw blades cut cleaner when you flood the contact point because continuous coolant stops binding on high silica content materials. Keep your grip firm while letting the plated grit grind through tight spots without forcing the spindle. Master these routine maintenance habits to maximize cutting performance across diverse stone types.
- Maintain constant water flow over the rotating rim to wash away ground powder
- Match your feed rate to the rock hardness so the bit does not overheat
- Withdraw slowly after breakthrough to prevent jagged exit holes on ceramic tiles