Bộ sưu tập: Flexible Diamond Mandrel Bands
Flexible Diamond Mandrel Bands – Drum Sanding for Stone & Glass
Flexible diamond mandrel bands for use on rubber expanding drum mandrels — the standard setup for lapidary cabochon grinding, stone shaping, and glass edge work. The flexible diamond-coated backing wraps tightly around the drum for consistent, even abrasion across the full contact surface. Available in a full grit range from coarse shaping through fine pre-polish.
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Available Sizes & Pricing
| Drum Size | Width | Grit Options | Price (USD) |
|---|---|---|---|
| 4" diameter | 1.5" | 60 / 120 / 220 / 400 / 600 / 1,200 / 3,000 | $12–$20 |
| 6" diameter | 1.5" | 60 / 120 / 220 / 400 / 600 / 1,200 / 3,000 | $16–$26 |
| 8" diameter | 1.5" | 60 / 120 / 220 / 400 / 600 / 1,200 / 3,000 | $20–$32 |
| 10" diameter | 1.5" | 60 / 120 / 220 / 400 / 600 / 1,200 / 3,000 | $24–$38 |
| Custom sizes | Custom | All grits available | Contact us |
Grit Selection Guide
| Grit | Stage | Best For | Surface Result |
|---|---|---|---|
| 60–120 | Coarse shaping | Initial cabochon grinding, rough shaping | Shaped, rough surface |
| 220–400 | Medium sanding | Scratch removal after coarse stage | Smooth, refined texture |
| 600–1,200 | Fine sanding | Pre-polish preparation | Near-scratch-free surface |
| 3,000 | Pre-polish | Before cerium oxide or final polish | High gloss, minimal haze |
Compatible Applications
- Lapidary cabochon grinding and shaping on drum machines
- Gemstone dopping and pre-form shaping
- Glass edge grinding and beveling on drum setups
- Ceramic and porcelain edge refinement
- Quartz, agate, jasper, and obsidian drum sanding
- Petrified wood and fossil stone shaping
- Knife handle and inlay stone finishing on drum mandrels
Related Tools
- Flexible Diamond Expanding Belts
- Sanding Accessories (Drum Wheels)
- Diamond Sanding Belts
- Resin Diamond Smoothing Pads
- Diamond Hand Pads
- Cerium Oxide Resin Pads
Frequently Asked Questions
-
Q: What drum sizes are flexible diamond mandrel bands compatible with?
A: Our mandrel bands are available for 4", 6", 8", and 10" rubber expanding drums — the most common sizes used in lapidary and glass grinding setups. Custom sizes are available on request. -
Q: Should diamond mandrel bands be used wet or dry?
A: Always use wet. Water cools the workpiece and drum, flushes away swarf, and significantly extends band life. Never run diamond mandrel bands dry — heat buildup will damage both the band and the workpiece. -
Q: What grit sequence should I use for lapidary cabochon work on a drum?
A: Start with 60 or 120 grit for shaping, then progress through 220, 400, 600, 1,200, and 3,000 grit. Finish with a cerium oxide pad or belt for a mirror result. Do not skip grit steps. -
Q: How do I install a mandrel band on a rubber expanding drum?
A: Slide the band over the deflated rubber drum, center it, then inflate the drum to expand and grip the band firmly. The band should be taut with no wrinkles before use. -
Q: How long do diamond mandrel bands last?
A: With proper wet use, bands typically last 15–40 hours of active grinding depending on material hardness and pressure. Harder stones like quartz and granite will wear bands faster than softer materials.