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The Diamond Bur 3 x 12mm Coarse Grit is a premium-quality rotary tool accessory engineered for powerful and precise material removal. Designed to handle demanding tasks, this bur features industrial-grade diamond particles that are uniformly bonded to a durable metal shaft, delivering aggressive cutting action while maintaining excellent control.
With a 3mm shank diameter and a 12mm cutting length, this bur offers extended reach and efficiency in accessing tight or deep spaces, making it ideal for professionals in metalworking, stone carving, dentistry, jewelry making, and various industrial applications. The coarse grit ensures rapid removal of excess material, shaping rough surfaces, and refining contours on metals, ceramics, glass, composites, stone, and hardened materials.
Product Type: Diamond Rotary Bur
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Head Diameter: 3mm
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Head Length: 12mm
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Grit Type: Coarse (typically 80–100 grit)
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Abrasive Material: Synthetic Diamond Grit
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Shank Diameter: 3/32″ (2.35mm)
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Shank Material: Corrosion-resistant Stainless Steel
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Total Length: 1-3/4″ (44.5mm)
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Bonding Method: Electroplated diamond bonding for optimal grit adhesion and cutting precision
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Maximum RPM: Up to 60,000 RPM (dependent on tool and application)
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Compatible Tools: High-speed rotary tools, micromotors, dental handpieces, Dremel®-type tools
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Recommended Use: Shaping, grinding, deburring, engraving, and surface preparation on hard materials
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Applications:
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Metal (steel, stainless steel, titanium, etc.)
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Stone (granite, marble, etc.)
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Ceramics and glass
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Composites and carbon fiber
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Jewelry and dental lab work
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Coolant Use: Recommended (wet or dry depending on material, wet use extends tool life and reduces heat buildup)
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Operating Notes: Apply light pressure and use in continuous motion to prevent loading or excessive heat buildup
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Features
Versatile & Durable: Built for multi-material applications including metal, stone, wood, plastic, glass, and composites — making it an essential tool for professionals across industries.
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High-Quality Diamond Abrasive: Made with premium-grade synthetic diamond particles for aggressive cutting power and extended tool life.
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Uniform Grit Distribution: Electroplated diamond coating ensures even wear and consistent cutting performance throughout the lifespan of the bur.
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Heat-Resistant Construction: Designed to withstand high-speed use and friction without losing form or functionality, minimizing risk of overheating.
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Precision Machined Shaft: Stainless steel 3/32" (2.35mm) shank fits securely into rotary tools, ensuring vibration-free performance and enhanced control.
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Ideal for High-Speed Operation: Safe and effective at speeds up to 60,000 RPM, compatible with most rotary tools and micromotors.
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Multi-Functional Use: Perfect for grinding, shaping, deburring, carving, engraving, and smoothing surfaces — both in roughing and detailing stages.
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Professional Grade Performance: Suitable for jewelers, dental technicians, hobbyists, metalworkers, lapidary artists, and more.
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Wet or Dry Use: Can be used with or without coolant depending on the material and application — wet use extends tool life and reduces dust.
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Low Maintenance: Clog-resistant design makes cleanup and maintenance simple, ensuring consistent results across multiple projects.
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