REZ Diamond Resin Soft Wheels

Premium REZ diamond resin soft wheels engineered with a resilient foam-backed flexible resin bond for lapidary bench grinders and combination cabbing machines. Available in 6"x1-1/2", 8"x1-1/2", and 8"x2" sizes across an exceptional grit range from 4 grit through 50,000 grit — covering the complete spectrum from ultra-coarse stock removal through mirror pre-polish finishing on a single wheel type. Every wheel features a standard 1" arbor bore and includes precision reducing bushings for 1/2", 5/8", and 3/4" shaft compatibility.

Specifications & Pricing

Wheel Size Available Grits Pricing
6" x 1-1/2" (150 x 38mm) 4, 6, 60, 140, 280, 325, 600, 1200, 3000, 8000, 14000, 50000 $55.00 (single) / $220.00 (4 grit) / $330.00 (6 grit)
8" x 1-1/2" (200 x 38mm) 4, 6, 60, 140, 280, 325, 600, 1200, 3000, 8000, 14000, 50000 $75.00 (single) / $250.00 (4 grit) / $465.00 (6 grit)
8" x 2" (200 x 50mm) 4, 6, 60, 140, 280, 325, 600, 1200, 3000, 8000, 14000, 50000 $85.00 (single) / $350.00 (4 grit) / $591.00 (6 grit)

Key Advantages

  • Conforming Foam Core: High-density foam backing flexes slightly under cabochon pressure, eliminating flat spots and ridges on rounded gemstone domes.
  • Comprehensive Grit Range: From aggressive 4 and 6 grit rough stock removal to 50,000 grit near-mirror pre-polish.
  • Wide Working Face: Available up to 8"x2" face width for maximum surface contact when working larger quartz, agate, jasper, and jade cabochons.
  • Universal Spindle Fit: 1" master arbor bore includes molded reducing bushings to seamlessly fit 1/2", 5/8", and 3/4" motor shafts.
  • Extended Bond Life: Premium diamond abrasive evenly distributed through high-grade phenolic resin prevents uneven wear and grooving.

Recommended Grit Progression Guide

Stage Grit Range Function & Surface Finish
Stock Removal & Roughing 4 – 60 grit Rapid material removal on hard rough gems (corundum, topaz, agate)
Intermediate Shaping 140 – 325 grit Refining cabochon domes, removing roughing scratches, setting profiles
Fine Smoothing 600 – 1200 grit Eliminating facet scratches and preparing uniform satin surface
Pre-Polish 3000 – 14000 grit High-sheen pre-polish, revealing internal colors and clarity
Final Pre-Polish 50000 grit Near-mirror finish ready for cerium, aluminum, or diamond compound polish

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Frequently Asked Questions

  • Q: What makes REZ resin soft wheels different from standard sintered wheels?
    A: REZ wheels use a flexible foam backing beneath a resilient resin-diamond matrix. Unlike rigid steel-core sintered wheels, REZ wheels conform slightly to curved gemstone surfaces, virtually eliminating flat spots, chatter marks, and subsurface micro-fractures in brittle gems like opal, fluorite, and turquoise.
  • Q: What are the ultra-coarse 4 and 6 grit wheels used for?
    A: Ultra-coarse 4 and 6 grit REZ wheels are specialized industrial tools designed for extremely rapid bulk stock removal on hard gemstone rough (Mohs 7–9), such as sapphire, ruby, chrysoberyl, and dense quartz, dramatically reducing initial shaping time before progressing to medium grits.
  • Q: Must REZ resin soft wheels always be used wet?
    A: Yes. Continuous clean water lubrication is mandatory. Running dry will scorch the resin bond, cause diamond pullout, produce harmful airborne mineral dust, and permanently damage the wheel. A steady drip or fine mist keeps the wheel cool and flushes rock slurry away.
  • Q: What operating speed is recommended for REZ wheels?
    A: Optimal operating speed is between 1,400 and 1,800 RPM. Never exceed 3,600 RPM. Ensure your machine arbor runs true without lateral runout to maximize wheel life and grinding smoothness.