Sintered Diamond Grinding Wheels

Sintered Diamond Grinding Wheels – Metal Bond Diamond Wheels for Professional Lapidary Grinding

Professional sintered metal bond diamond grinding wheels for lapidary bench grinders and combination machines. The 5mm deep sintered diamond matrix provides self-sharpening action and maximum service life — ideal for high-volume professional lapidary grinding on hard stone and gem materials where resin bond wheels wear too quickly. Available in 6"×1-1/2" ($250), 8"×1-1/2" ($345), and 8"×2" ($455) across 60–600 grit. Includes reducing bushings for 1/2", 5/8", and 3/4" spindle compatibility.

🔥 Shop Sintered Diamond Grinding Wheels – From $250.00

Available Sizes & Pricing

Size Arbor Grit Range Price
6" × 1-1/2" 1" 60, 80, 100, 180, 220, 360, 600 $250.00
8" × 1-1/2" 1" 60, 80, 100, 180, 220, 280, 360, 600 $345.00
8" × 2" 1" 60, 80, 100, 120, 180, 220, 280, 360, 600 $455.00

Grit Selection Guide

Grit Stage Application
60 – 80 Rough grinding Aggressive material removal on hard stone, initial shaping
100 – 180 Medium grinding Profile refinement, removing coarse scratches
220 – 360 Fine grinding Surface smoothing, preparing for pre-polish
600 Pre-polish Final smoothing before resin pads or polishing compound

Sintered vs Resin Bond — Which to Choose

Feature Sintered Metal Bond Resin Bond
Bond type Metal matrix (sintered) Resin (flexible or rigid)
Diamond depth 5mm — self-sharpening Surface layer only
Service life Very long — production use Moderate — hobbyist/light pro
Best for Hard stone, high-volume grinding Curved surfaces, cabochon doming
Price Higher upfront, lower cost/hour Lower upfront

Compatible Applications

  • High-volume professional lapidary grinding on hard stone (Mohs 6+)
  • Agate, jasper, quartz, petrified wood, obsidian slab and cabochon grinding
  • Hard gem material shaping — sapphire, ruby, topaz, tourmaline
  • Glass flat and curved surface grinding
  • Ceramic and porcelain surface grinding
  • Fits standard 1/2", 5/8", and 3/4" arbor bench grinders and lapidary machines

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Frequently Asked Questions

  • Q: What is the difference between sintered metal bond and resin bond diamond grinding wheels?
    A: Sintered metal bond wheels have a 5mm deep diamond matrix where diamonds are embedded throughout the metal bond layer — as the surface wears, fresh diamonds are continuously exposed (self-sharpening). This gives sintered wheels a much longer service life and makes them ideal for high-volume professional use on hard stone. Resin bond wheels have diamonds bonded in a surface resin layer — they wear faster but are more flexible and better suited for curved cabochon shaping and lighter grinding work.
  • Q: Are sintered diamond wheels worth the higher price?
    A: Yes, for professional and production use. While sintered wheels cost significantly more upfront ($250–$455 vs $60–$88 for resin wheels), their much longer service life makes the cost-per-hour of grinding significantly lower. For hobbyists grinding occasionally, resin bond wheels are more economical. For professionals grinding daily on hard stone, sintered wheels pay for themselves quickly.
  • Q: What grit sintered wheel should I start with for hard stone grinding?
    A: Start with 60–80 grit for aggressive material removal and initial shaping on hard stone. Progress to 100–180 grit to refine the profile, 220–360 grit for fine smoothing, and 600 grit for pre-polish before moving to resin soft wheels or diamond smoothing pads for the pre-polish sequence.
  • Q: Do sintered diamond wheels require water cooling?
    A: Yes — always use water cooling with sintered diamond wheels. Water prevents heat buildup in the metal bond matrix, extends wheel life, and produces cleaner grinding results by flushing away stone swarf. Never run sintered wheels dry.
  • Q: What arbor sizes do sintered grinding wheels fit?
    A: All sintered wheels include reducing bushings for 1/2", 5/8", and 3/4" arbors, making them compatible with most standard lapidary bench grinders and cabbing machines. Verify your machine's spindle diameter before ordering.