Diamond Grinding Wheels

Diamond Grinding Wheels – Hard, Soft Resin & Sintered Wheels for Lapidary Bench Grinders

Our Diamond Grinding Wheels collection covers the full spectrum of lapidary grinding needs — from aggressive coarse shaping to ultra-fine pre-polish — in three distinct wheel types: Diamond Flat Hard Wheels for rigid, precise grinding; REZ Soft Resin Diamond Wheels for curved surface conforming and fine polishing; and Sintered Diamond Grinding Wheels for maximum longevity in professional high-volume use. Available in 6" and 8" diameters, 1.5" and 2" widths, and a grit range from 46 through 50,000.

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Wheel Types Comparison

Type Bond Best For Grit Range Price Range
Diamond Flat Hard Wheel Electroplated / hard bond Rigid flat grinding, shaping, edge work on stone & glass 46–1,200 $60–$120
REZ Soft Resin Wheel Flexible resin bond Curved surface grinding, cabochon domes, fine polishing 60–50,000 $65–$85
Sintered Diamond Wheel Sintered metal bond Professional high-volume grinding, maximum wheel life 60–600 $260–$460

Available Sizes

Diameter Width Available Types
6" 1.5" Hard Flat, REZ Soft Resin, Sintered
8" 1.5" Hard Flat, REZ Soft Resin, Sintered, Textured
8" 2" Hard Flat, REZ Soft Resin, Sintered

Grit Selection Guide

Grit Stage Recommended Wheel Type
46–100 Coarse grinding Hard Flat or Sintered — rapid shaping and material removal
140–360 Medium grinding Hard Flat, REZ Soft Resin, or Sintered — surface smoothing
600–1,200 Fine grinding Hard Flat or REZ Soft Resin — pre-polish preparation
3,000–8,000 Pre-polish REZ Soft Resin — final smoothing before polishing
14,000–50,000 Polish REZ Soft Resin — high-gloss surface finishing

Compatible Applications

  • Lapidary cabochon shaping — dome profiling on agate, jasper, quartz, obsidian, and all lapidary stones
  • Curved surface grinding — REZ Soft Resin wheels conform to cabochon dome profiles for even contact
  • Glass edge grinding — flat hard wheels for precise edge shaping on art glass and fused glass
  • Stone carving and sculpting — coarse sintered wheels for rapid material removal on hard stone
  • Lapidary bench grinders — 6" and 8" wheels for all standard lapidary bench grinder spindles
  • Cabbing machines — multi-wheel setups from coarse shaping through fine pre-polish in one machine
  • Professional production grinding — sintered wheels for high-volume lapidary operations

Related Tools

Frequently Asked Questions

  • Q: What is the difference between Hard Flat, REZ Soft Resin, and Sintered diamond wheels?
    A: Hard Flat wheels use a rigid bond for precise, flat grinding on stone and glass — ideal for shaping and edge work. REZ Soft Resin wheels use a flexible resin bond that conforms to curved surfaces, making them perfect for cabochon dome grinding and fine polishing up to 50,000 grit. Sintered wheels have diamonds distributed throughout the full metal matrix for maximum longevity — the professional choice for high-volume lapidary grinding.
  • Q: Which wheel should I use for grinding lapidary cabochon domes?
    A: The REZ Soft Resin wheels are specifically designed for curved surface work. The flexible resin bond conforms to the dome profile of a cabochon, maintaining full contact across the curved surface for even, consistent grinding. Use coarser REZ grits (60–280) for shaping and finer grits (600–50,000) for smoothing and polishing the dome.
  • Q: Should diamond grinding wheels be used wet or dry?
    A: Wet use is essential for all wheel types. Always run water over the grinding wheel during use to cool the diamond abrasive, prevent heat damage to the stone, and suppress stone dust.
  • Q: What arbor size do these wheels use?
    A: Most wheels use a standard 1" arbor bore compatible with lapidary bench grinders. Reducing bushings are available if your spindle diameter differs from the wheel bore.