Diamond Magnetic Disks

Diamond Magnetic Disks – Large-Format Professional Diamond Disks for Flat Lap & Wheel Head Systems

Professional-grade large-format electroplated diamond grinding and polishing disks for professional flat lap machines, wheel head polishing systems, and production lapidary operations. Ultra-thin 2.3mm design with nickel-bonded diamond on rubberized magnetic backing for instant tool-free attachment. Available in seven sizes from 10" to 30", grit range 45 through 2000.

🔥 Shop Diamond Magnetic Disks – From $30.00

Product Format Guide

Diameter Grits Available Price Range Best For
10" 45–2000 $30–$45 Mid-size professional flat lap machines
12" 45–2000 $85 Professional flat lap and wheel head systems
14" 45–2000 $130–$140 Large professional flat lap machines
16" 45–2000 $150–$170 Large professional and production systems
18" 45–2000 $170–$195 Production flat lap and wheel head systems
24" 45–2000 $265–$285 Large production grinding systems
30" 45–2000 $600 Industrial-scale production grinding

Grit Selection Guide

Grit Stage Application
45–100 Coarse grinding Rough sawn surfaces, rapid stock removal
140–325 Medium grinding Surface smoothing, scratch pattern refinement
600–800 Fine grinding Pre-polish surface preparation
1200–2000 Ultra-fine Near-mirror surface before polishing pads

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Frequently Asked Questions

  • Q: What are large format diamond magnetic disks used for in professional lapidary?
    A: Large format diamond magnetic disks (10"–30") are used in professional lapidary production facilities, glass grinding operations, and stone fabrication workshops for high-volume flat grinding and polishing. The magnetic quick-change system allows operators to switch between grit stages in seconds without tools, dramatically increasing production throughput compared to PSA or bolt-on disc systems.
  • Q: How do I choose the right grit diamond magnetic disk for flat lapping stone?
    A: Start with 45–100 grit for rough sawn surfaces, progress through 140–325 for surface smoothing, 600–800 for pre-polish preparation, then 1200–2000 for ultra-fine pre-polish before polishing pads. Always fully remove the scratch pattern from each grit stage before progressing.
  • Q: What is the advantage of magnetic backing over PSA backing for diamond grinding disks?
    A: Magnetic backing provides instant, tool-free disc changes in seconds vs. PSA peel-and-apply. For production operations with dozens of grit changes per day, the magnetic system delivers significant time savings and lower consumable costs.
  • Q: Can diamond magnetic disks be used on a standard hobby flat lap machine?
    A: The large-format disks (10"–30") are designed for professional machines with metal wheel heads. For hobby flat laps (6"–8" platens), use our Diamond Dot Magnetic Discs in 6"–14" sizes instead.
  • Q: How long do electroplated diamond magnetic disks last in production flat grinding use?
    A: Many production hours on glass and soft stone with proper wet use. Shorter on hard materials like granite. Always use wet with consistent light-to-medium pressure for maximum longevity.