{"product_id":"4mm-diamond-cylinder-flat-end-bur-45-grit-3mm-shank-10pcs","title":"4mm Flat End Cylinder Diamond Bur, 10pcs – 45 Grit 3mm Shank Precision Carving Tool for Gemstone, Stone \u0026 Glass","description":"\u003cp\u003eProfessional-grade \u003cstrong\u003e4mm Flat End Cylinder Diamond Burs (3mm Shank, 10-Piece Set)\u003c\/strong\u003e engineered for aggressive stock removal, edge shaping, slotting, and flat bottom cavity carving on ultra-hard materials. Coated with premium coarse 45-grit industrial diamond particles via high-adhesion electroplating on a rigid heat-treated steel mandrel.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Diameter:\u003c\/strong\u003e 4 mm\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eHead Shape:\u003c\/strong\u003e Flat End Cylinder (Cylindrical with Flat Tip)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eShank Diameter:\u003c\/strong\u003e 3 mm (Standard rotary tool, Dremel, and micro-motor fit)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eGrit:\u003c\/strong\u003e 45# Extra Coarse (Fast material removal and deep carving)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eBond Type:\u003c\/strong\u003e Electroplated Diamond\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eQuantity:\u003c\/strong\u003e 10 pieces per set\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRecommended Applications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eGemstone roughing, lapidary pre-forming, and jade\/agate carving\u003c\/li\u003e\n  \u003cli\u003eGlass edging, bottle neck drilling cleanout, and beveling\u003c\/li\u003e\n  \u003cli\u003eCeramic tile slotting, porcelain relief engraving, and stone masonry\u003c\/li\u003e\n  \u003cli\u003eHardened steels, carbides, and cast iron surface deburring\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eUsage Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eAlways operate with water coolant or continuous liquid lubricant to prevent diamond matrix overheating and maintain optimal cutting speed.\u003c\/li\u003e\n  \u003cli\u003eMaintain working speeds between 10,000 and 25,000 RPM using moderate, uniform contact pressure.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"hanslapidarytool","offers":[{"title":"Default Title","offer_id":51430772736184,"sku":"BUR-FCYL-4MM-45G-3S-10PK","price":7.69,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0570\/3217\/9896\/files\/Diamond_Cylinder_Drill_Bits.png?v=1744420404","url":"https:\/\/lapidarygrinder.com\/en-mx\/products\/4mm-diamond-cylinder-flat-end-bur-45-grit-3mm-shank-10pcs","provider":"hanslapidarytool","version":"1.0","type":"link"}