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The Diamond Twist Drill 2.1mm is the ideal tool for professional jewelers, glass artists, and craft enthusiasts who demand precision and longevity. Designed for drilling hard and brittle materials such as stone, glass, pearls, ceramics, and gemstones, this premium drill bit ensures clean, smooth holes every time.
Crafted from high-quality hardened steel, each bit is milled to perfection and electroplated with medium-fine diamond particles, ensuring exceptional sharpness, cutting efficiency, and long-lasting performance. The 2.1mm diameter offers a perfect balance between strength and precision—ideal for fine jewelry work and detailed decorative applications.
Mounted on a 3/32-inch (2.35mm) shank, it fits standard rotary handpieces, flex shafts, and micromotors used in jewelry workshops and studios worldwide.
Use with a small amount of water as lubricant to reduce heat buildup, extend tool life, and achieve the cleanest possible results.
Material: High-quality hardened steel with precision electroplated diamond coating for long-lasting performance
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Drill Size: 2.1mm
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Shank Size: 3/32 inch (2.35mm) – compatible with standard handpieces, flex shafts, and rotary tools
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Coating Type: Industrial-grade diamond electroplating for superior cutting efficiency
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Grit Type: Medium-fine diamond grit for smooth and controlled drilling
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Overall Length: Approximately 45mm – 50mm
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Cutting Length: Approximately 10mm – 12mm
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Recommended Speed: 3,000 – 10,000 RPM (low to medium speed range)
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Lubrication: Use with water or light coolant to minimize heat and extend tool life
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Applications: Ideal for drilling pearls, gemstones, glass, ceramics, shell, enamel, and semi-precious stones
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Usage Tips: Apply light pressure; allow the diamond coating to perform the cutting
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Finish: Smooth surface with corrosion-resistant coating
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Durability: Long service life with consistent cutting performance
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Tool Compatibility: Suitable for jeweler’s handpieces, micromotors, and other precision rotary tools
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Features
Electroplated diamond particles (medium-fine grit) for precise, clean drilling
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3⁄32-inch (2.35mm) shank fits all standard handpieces, flex shafts, and rotary tools
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Excellent for drilling stones, pearls, glass, ceramics, and semi-precious materials
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High-quality steel construction ensures strength, stability, and long-lasting performance
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Medium-fine diamond grit provides smooth hole finishes with minimal chipping
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Ideal for jewelers, glass artists, and craft professionals requiring precision drilling
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Designed for wet use – lubricate with water to reduce heat and extend drill life
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Consistent performance for both delicate and dense materials
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Uniform diamond coating for balanced cutting and reduced vibration
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Corrosion-resistant finish enhances durability and longevity
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Suitable for fine jewelry making, bead crafting, and lapidary applications
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Lightweight and easy to control, allowing greater precision and comfort during use
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Compatible with a wide range of rotary tools and micromotors
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Perfect for small-diameter drilling in fragile or brittle materials
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Reliable and economical choice for both professional and hobby use
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