Collection: Diamond Sanding Discs & Pads
Diamond Sanding Discs & Pads – 6"–24" for Stone, Glass & Lapidary
Flexible diamond sanding discs and pads for grinding, smoothing, and finishing stone, glass, ceramic, and hard minerals on angle grinders, flat lap machines, and disc sanders. Available in diameters from 6" to 24" with Velcro, PSA, or magnetic backing — the professional choice for lapidary artists, stone fabricators, and glass workers who demand consistent, long-lasting abrasive performance.
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Size & Price Guide
| Diameter |
Grit Options |
Backing |
Price (USD) |
| 6" (150mm) |
60–1800 |
Velcro / PSA / Magnetic |
$31.00 |
| 8" (200mm) |
60–1800 |
Velcro / PSA / Magnetic |
$55.00 |
| 10" (250mm) |
60–1800 |
Velcro / PSA / Magnetic |
$85.00 |
| 12" (300mm) |
60–1800 |
Velcro / PSA / Magnetic |
$120.00 |
| 14" (350mm) |
60–1800 |
Velcro / PSA / Magnetic |
$165.00 |
| 16" (400mm) |
60–1800 |
Velcro / PSA / Magnetic |
$215.00 |
| 18" (450mm) |
60–1800 |
Velcro / PSA / Magnetic |
$270.00 |
| 24" (600mm) |
60–1800 |
Velcro / PSA / Magnetic |
$485.00 |
Grit Selection Guide
| Grit |
Stage |
Best For |
Surface Result |
| 60–120 |
Coarse grinding |
Initial shaping, saw mark removal |
Rough, shaped surface |
| 240–400 |
Medium sanding |
Scratch removal after coarse stage |
Smooth, refined texture |
| 600–800 |
Fine sanding |
Pre-polish surface preparation |
Near-scratch-free surface |
| 1,200–1,800 |
Ultra-fine / pre-polish |
Before cerium oxide or resin pad finish |
High gloss, minimal haze |
Compatible Applications
- Flat lap machine disc grinding and polishing (6"–24")
- Angle grinder disc sanding on stone slabs and countertops
- Lapidary gemstone cabochon flat grinding
- Glass surface scratch removal and refinement
- Ceramic tile and porcelain surface preparation
- Granite and marble countertop surface finishing
- Quartz, agate, jasper, and obsidian flat sanding
Related Tools
Frequently Asked Questions
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Q: What backing type should I choose for my flat lap machine?
A: Choose magnetic backing for machines with a magnetic platen (most common on Genie and Titan models), Velcro for hook-and-loop platens, or PSA (pressure-sensitive adhesive) for permanent mounting. Check your machine’s platen type before ordering.
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Q: What grit sequence should I use for lapidary flat grinding?
A: Start with 60 or 120 grit for shaping, then progress through 240, 400, 600, 800, 1200, 1800. Follow with resin diamond smoothing pads and finish with cerium oxide for a mirror result.
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Q: Can diamond sanding discs be used wet?
A: Yes — wet use is strongly recommended for stone and glass. Water cools the disc and workpiece, flushes swarf, and significantly extends disc life. Never run diamond discs dry on stone or glass.
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Q: What is the largest disc size available?
A: We stock discs up to 24" (600mm) diameter for large flat lap machines and industrial disc sanders. Custom sizes are available on request.
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Q: How long do diamond sanding discs last?
A: With proper wet use, diamond discs typically last 20–60 hours of active grinding depending on material hardness, grit, and applied pressure. Harder stones like quartz and granite will wear discs faster than softer materials.
