Diamond Mounted Point Grinding Bit 10-25mm Spherical Concave Head
Diamond Mounted Point Grinding Bit 10-25mm Spherical Concave Head
NEWONE Diamond Mounted Point Grinding Bit — Spherical Concave Head, 10–25mm
Craft flawless spherical beads from jade, amber, stone, beeswax, glass, and more with this precision-engineered diamond mounted point grinding bit. Featuring an electroplated diamond surface with a spherical concave head, it shapes and grinds round beads cleanly and accurately with minimal chipping — perfect for lapidary artists, jewelry makers, and DIY craftspeople.
Made in Mainland China.
Key Features
- Electroplated Diamond Abrasive: High hardness and excellent wear resistance ensure long-lasting, consistent performance across many projects.
- Spherical Concave Head Design: Specially engineered for forming and grinding spherical beads — produces clean, accurate results in minutes.
- Wide Compatibility: Suitable for jade, amber, stone, beeswax, glass, and other semi-precious or decorative materials.
- Chamfered Round Shank (6mm): Ensures secure clamping and a stable, vibration-free working process.
- Easy to Use: Compatible with bench drills and hand drills. Recommended operating speed: up to 3,000 RPM.
- Head Diameter Range: Available from 10mm to 25mm — choose the size that best suits your bead-making needs.
Specifications
| Material | Electroplated Diamond |
| Head Diameter | 10–25mm (select your size) |
| Shank Diameter | 6mm |
| Head Shape | Spherical / Concave |
| Recommended Speed | Up to 3,000 RPM |
| Compatible Materials | Jade, Amber, Stone, Beeswax, Glass |
| Package Contents | 1 × Diamond Mounted Point Grinding Bit |
| Origin | Mainland China |
How to Use
- Select the appropriate head diameter (10–25mm) for your bead size.
- Secure the 6mm chamfered shank firmly in your drill chuck.
- Set your drill speed to no more than 3,000 RPM for optimal results.
- Always use a lubricant (water or cutting fluid) to cool the workpiece and bit during operation. This significantly extends the life of the mounted point.
- Apply light pressure — letting the diamond surface do the work reduces wear and improves bead quality.
Pro Tips
- Use ample water lubrication and keep drill pressure low for best results and longest bit life.
- Ideal for jewelry crafters, gemstone artisans, and lapidary hobbyists.
- Work slowly and steadily for the cleanest, most precise spherical beads.
For general tool safety guidance, visit CPSC Power Tool Safety.
Frequently Asked Questions
Q: What materials can this diamond grinding bit work on?
A: This diamond mounted point grinding bit is designed for use on jade, amber, stone, beeswax, and glass. Its electroplated diamond surface provides the hardness needed to shape and smooth these semi-precious and decorative materials with precision.
Q: What drill type is compatible with this grinding bit?
A: The bit is compatible with most standard bench drills and handheld drills that accept a 6mm shank. The chamfered round shank design ensures a secure, stable clamp. Recommended operating speed is up to 3,000 RPM.
Q: Do I need to use lubricant while grinding?
A: Yes — always use water or cutting fluid as a lubricant while the bit is in operation. Keeping the workpiece and bit cool reduces friction, prevents overheating, and significantly extends the working life of the diamond mounted point.
Q: How do I choose the right head diameter?
A: Select a head diameter that matches or slightly exceeds the desired bead size you want to create. Sizes range from 10mm to 25mm, offering flexibility for a wide variety of bead and stone-forming projects.