Concave Abrasive Grinding Wheel – Jade, Glass & Bead Polishing
Concave Abrasive Grinding Wheel – Jade, Glass & Bead Polishing
Concave Abrasive Grinding Wheel for Glass, Jade, Beads & Bracelets
Achieve smooth, precise curved profiles on glass edges, jade carvings, bracelets, rings, and beads with the RAMS BRALIN Concave Abrasive Grinding Wheel. Crafted from durable emery material, this handle grinding tool mounts easily on a bench drill or electric drill, delivering consistent results for both hobbyists and professional lapidary artists. Made in Mainland China.
Key Features
- Versatile Working Slot Sizes: Available in 3mm, 4mm, 5mm, 6mm, 8mm, 10mm, and 12mm — perfect for a wide range of bead, ring, and bracelet arc profiles.
- Two Grit Options: P150 Medium for shaping and material removal; P400 Fine for smooth finishing and polishing passes.
- Compact Dimensions: 20mm outer diameter with a 6mm shank diameter for compatibility with most rotary tools, bench drills, and electric drills.
- Emery Construction: High-quality emery abrasive provides long-lasting cutting performance on glass, jade, stone, and similar hard materials.
- Wet Grinding Ready: Designed for water-cooled operation to maximise wheel life and surface finish quality.
Specifications
| Brand | RAMS BRALIN |
| Model | CAW01 |
| Material | Emery |
| Outer Diameter | 20mm |
| Shank Diameter | 6mm |
| Working Slot Sizes | 3 / 4 / 5 / 6 / 8 / 10 / 12mm |
| Grit | P150 Medium | P400 Fine |
| Recommended Speed | Electric drill: 3,600 RPM | Bench drill / machine: 6,000–10,000 RPM |
| Country of Origin | Mainland China |
How to Use
- Select the slot size that matches your bead, ring, or bracelet arc profile.
- Secure the 6mm shank in your drill chuck or rotary tool collet.
- Set speed to the recommended RPM range for your machine type.
- Always add water during grinding to cool the wheel and workpiece, and to achieve the best surface finish.
- Start with P150 Medium grit for rough shaping, then switch to P400 Fine for a smooth, polished result.
Applications
Ideal for grinding and polishing glass edges, jade carvings, stone beads, bracelet arcs, ring channels, and other curved hard-material surfaces. A must-have tool for lapidary work, jewellery making, and DIY stone crafting.
Related Products You May Like
- Leather Hole Punch Tool | DIY Stitching Punch 4/5/6mm
- U & V Leather Groover Skiving Tool Kit – 4-Piece Stainless Set
- Stainless Steel Ceramic Trimming Tool – Curved Skip Knife
Learn more: OSHA guidance on hand and power tools
Frequently Asked Questions
Q: What materials can the concave abrasive grinding wheel work on?
A: This emery concave grinding wheel is designed for hard materials including glass, jade, stone, and similar minerals. It excels at grinding bead arcs, bracelet channels, ring grooves, and glass edges into smooth, curved profiles.
Q: Do I need to use water when operating this grinding wheel?
A: Yes — water cooling is strongly recommended during all grinding and polishing operations. Adding water prevents overheating, extends wheel life, and produces the best possible surface finish on your workpiece.
Q: What drill speed should I use with this wheel?
A: For electric drills, a speed of approximately 3,600 RPM is recommended. For bench drills or dedicated grinding machines, 6,000–10,000 RPM delivers optimal performance. Always ensure the shank is securely seated in the chuck before operating.
Q: Which grit should I start with — P150 or P400?
A: Begin with the P150 Medium grit for initial shaping and material removal. Once the desired profile is achieved, switch to the P400 Fine grit wheel to smooth and polish the surface to a refined finish.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.