Diamond Sanding Belts

Flexible Diamond Sanding Belts – 50+ Sizes, Grits 60–1800

The most comprehensive range of flexible diamond sanding belts for lapidary, stone, glass, and ceramic grinding. With over 50 standard sizes from 75mmx36mm to 3500mmx150mm and grits 60 to 1800, we stock belts for virtually every belt grinder and sanding machine. All belts feature a flexible diamond-coated backing for consistent abrasion on flat, curved, and contoured surfaces.

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Popular Sizes & Prices

Dimensions Grit Options Price
75mmx36mm 60–1800 $17.00
75mmx38mm 60–1800 $19.00
100mmx38mm 60–1800 $22.00
457mmx19mm 60–1800 $12.00
610mmx25mm 60–1800 $25.00
914mmx50mm 60–1800 $70.00
6"x1-1/2" 60–1800 $30.00
6"x2-1/2" 60–1800 $47.00
8"x3" 60–1800 $75.00
1800mmx50mm 60–1800 $132.00
2000mmx100mm 60–1800 $285.00
3350mmx100mm 60–1800 $495.00
3500mmx150mm 60–1800 $755.00

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 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

  • Lapidary belt grinder cabochon grinding and shaping
  • Stone slab surface grinding and scratch removal
  • Glass edge grinding and beveling on belt machines
  • Ceramic tile and porcelain surface preparation
  • Quartz, agate, jasper, obsidian, and petrified wood sanding
  • Granite and marble countertop edge finishing
  • Industrial stone and glass surface processing

Related Tools

Frequently Asked Questions

  • Q: How do I find the right diamond sanding belt size for my machine?
    A: Measure your existing belt’s length and width, or check your machine’s manual for the recommended belt size. We stock 50+ standard sizes — contact us if you need a custom size.
  • Q: What grit diamond sanding belt should I use for lapidary stone grinding?
    A: Start with 60 grit for rough shaping and stock removal, progress through 120, 240, 400, 600 for smoothing, and 800–1800 for fine finishing before polishing with cerium oxide.
  • Q: Can flexible diamond sanding belts be used wet?
    A: Yes — wet use is strongly recommended for stone and glass. Water cools the belt and workpiece, flushes swarf, prevents glazing, and significantly extends belt life.
  • Q: What is the difference between flexible diamond belts and conventional abrasive belts?
    A: Diamond belts cut harder materials (stone, glass, ceramic) that conventional silicon carbide or aluminum oxide belts cannot handle effectively. Diamond abrasive lasts significantly longer on hard materials.
  • Q: Do you offer custom diamond sanding belt sizes?
    A: Yes — contact us with your required dimensions. We can produce custom belt sizes for specialized machines and industrial applications.