Covington Resin Bond Magnetic Flat-lap Discs
Take your stones to the next level with the Covington Magnetic Backed Resin Bond Diamond Discs. Designed specifically for pre-polishing, these premium resin bond discs remove fine scratches left by coarse grinding while preparing your stones for a brilliant final polish. The softer resin bond exposes fresh diamonds as it wears, delivering a smoother, more consistent finish with less risk of deep scratches compared to metal-bond discs.
The magnetic backing allows you to swap discs in seconds without tools, making grit changes fast and efficient. Whether you're working on cabochons, slabs, glass, or other lapidary materials, these discs help streamline your workflow while maintaining exceptional surface quality. They feature a center hole for accurate alignment on the master plate and are designed for use with Covington magnetic flat lap systems.
Features & Benefits
- Ideal for pre-polishing to remove fine grinding marks before final polish.
- Resin bond construction provides a smoother, less aggressive cutting action than nickel bond discs.
- Magnetic backing allows for quick, tool-free disc changes.
- Consistent diamond exposure delivers uniform cutting and long-lasting performance.
- Center alignment hole ensures accurate positioning on your steel master lap.
- Perfect for stone and glass on flat lap polishing systems.
Available Sizes
- 8" (No Hole)
- 10" (No Hole)
- 12" (1/4" Center Hole)
- 12" (1" Center Hole)
- 18" (1" Center Hole)
- 24" (1" Center Hole)
Available Grits
| Grit | Color | Best For |
|---|---|---|
| 100 | Black | Fine shaping and removing coarse scratches |
| 220 | Purple | Beginning the pre-polish process |
| 325 | Brown | Smoothing surfaces before finer polishing |
| 600 | Red | Fine pre-polishing |
| 800 | Green | Refining the surface before polishing |
| 1,200 | Blue | Pre-final polish |
| 3,000 | Orange | Producing a near-polished finish |
| 8,000 | Yellow | High-gloss pre-polish |
| 14,000 | White | Ultra-fine finishing |
| 50,000 | Grey | Mirror-finish polishing |
| 100,000 | Pink | Maximum brilliance and final polish |
Best For
- Pre-polishing cabochons
- Polishing glass
- Preparing stones for cerium oxide or diamond compound
- Fast grit changes on magnetic flat lap systems
- Covington 12", 18", and 24" Flat Lap Grinders
Why Choose Resin Bond Discs?
Unlike nickel bond discs that are designed for aggressive material removal, resin bond discs provide a finer, more forgiving cutting action. This helps eliminate subsurface scratches while creating an exceptionally smooth surface that requires less effort during the final polishing stage. For lapidary artists seeking professional-quality finishes with improved efficiency, resin bond discs are an essential step in the polishing process
