Diamond Cup Burrs for Carving (1mm–6mm)
Diamond Cup Burrs for Carving (1mm–6mm)
Eternal Tools
SKU:DFORM1
Our Diamond Cup Burrs are precision-coated carving burrs designed for shaping, details in glass, stone, ceramic, shell, wood, bone and other hard materials.
Also known as ball-forming cup burrs, they are suitable for carving spheres, eye and circle shapes, round dimples, hemispherical hollows, texturing effects and shaping.
- Available individually in ten sizes from 1mm to 6mm, or as a 6-piece set (1 each of sizes: 1mm, 2mm, 3mm, 4mm, 5mm, and 6mm)
- High-grade diamond electroplating for precise, even cutting
- 2.35mm steel shank – fits most micromotors, Dremel and rotary tools
- Works on glass, stone, ceramics, enamel, shell, bone and metal
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Description
Description
Sizes Available
- 1.0mm – fine micro detail
- 1.2mm – engraving, bead making, delicate carving
- 1.5mm – small dimples
- 1.8mm – precision carving in stone and glass
- 2.0mm – bead making, engraving, shaping
- 2.5mm – general carving and forming
- 3.0mm – shaping small spheres, glass engraving
- 4.0mm – carving larger ball shapes in stone and glass
- 5.0mm – shaping curves, depressions and textures
- 6.0mm – deeper, wider forms
Ideal For
- Glass engraving
- Stone carving & lapidary (jade, agate and more)
- Ceramic and enamel work
- Fossil preparation
- Bead making
- Jewellery modelling & shaping work
How to Use
- Run at low to medium speed (approximately 8,000–12,000 RPM)
- Use light pressure – let the diamond do the cutting
- For glass and stone, use with water for cooling and dust control
Why Choose Eternal Tools
We supply only precision-made diamond tools with consistent coating quality and excellent longevity. No thin patches, no uneven plating – just reliable performance and clean carving.
Customer Reviews
Customer Reviews
Specifications
Specifications
Technical Specifications
- Total Length: 43mm
- Shank Diameter: 2.35mm (3/32") – suitable for micromotors, pendant motors, Dremel-type tools and rotary handpieces with a 2.35mm collet.
- Head Shape: Hollow cup / concave forming burr.
- Diamond Grit:
- 1.0mm – 3.0mm sizes: 240 grit (fine)
- 4.0mm – 6.0mm sizes: 150 grit (medium)
- Diamond Coating: Electroplated diamond grit for clean, controlled cutting on hard materials.
- Individual Sizes Available: 1.0mm, 1.2mm, 1.5mm, 1.8mm, 2.0mm, 2.5mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm.
- 6-Piece Set Includes: 1.0mm, 2.0mm, 3.0mm, 4.0mm, 5.0mm, 6.0mm.
- Material Compatibility: Glass, stone (jade, agate, quartz, etc.), ceramics, enamel, shell, bone, and non-ferrous metals.
- Recommended Speed: 8,000–12,000 RPM. (Use lower speeds for delicate engraving or small diameter burrs.)
- Cooling: Use with water when working on glass and stone to reduce heat, dust, and wear.

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