What Is Electroplated Diamond Sandpaper?
Electroplated diamond sandpaper is a superhard abrasive tool that uses electroplating technology to firmly bond diamond particles onto a substrate, forming a single-layer thin film. Compared to ordinary sandpaper, diamond sandpaper offers superior hardness, longer service life, and more precise grinding performance — making it the ideal choice for processing ultra-hard materials such as glass, ceramics, quartz, and crystal.
Grit Selection Guide
Choosing the correct grit is the key to achieving the desired result:
- Grit 80 — Coarse grinding: ideal for rapid material removal, reshaping rough surfaces, or stripping old coatings.
- Grit 100 — Coarse-to-medium transition: suitable for initial shaping and removing larger scratches.
- Grit 120 — Medium grinding: great for surface leveling and transitioning after coarse grinding.
- Grit 200 — Medium-fine grinding: further refines the surface and removes marks left by previous steps.
- Grit 400 — Fine grinding: precision sanding that brings the surface close to smooth.
- Grit 800 — Finishing/polishing: final polish for a clean, mirror-like surface finish.
Pro Tip: Always work from coarse to fine. Before switching to a finer grit, make sure all scratches from the previous step have been fully removed.
Size Selection Guide
Choose the right disc size based on your workpiece and equipment:
- Dia 50mm — Best for small workpieces and detailed local grinding, commonly used with handheld angle grinders or compact tools.
- Dia 75mm — Ideal for small-to-medium workpieces, balancing flexibility and efficiency.
- Dia 100mm — A versatile all-rounder compatible with most bench-top and handheld grinding equipment.
- Dia 125mm — Suited for larger flat surface grinding with higher efficiency.
- Dia 175mm — Designed for large workpieces or industrial-grade processing, offering maximum coverage and throughput.
Compatible Materials
Electroplated diamond sandpaper is specially suited for grinding and polishing the following materials:
- Glass — Lenses, glass panels, optical glass
- Ceramics — Industrial ceramics, bathroom ceramics, precision ceramic components
- Quartz & Crystal — Quartz stone countertops, crystal crafts
- Hard Alloys — Mold steel, tungsten carbide, and other metal materials
- Gemstones & Minerals — Jade, agate, and other natural minerals
Step-by-Step Usage Instructions
Step 1: Preparation
Clean the workpiece surface to remove oil and debris. Select the appropriate disc size and grit, then securely mount the diamond sandpaper disc onto your angle grinder or grinding equipment.
Step 2: Coarse Grinding
Use Grit 80 or 100 for coarse grinding. Apply steady, even pressure and keep the disc moving across the surface. Avoid dwelling in one spot to prevent overheating and surface damage.
Step 3: Medium Grinding
Switch to Grit 120 or 200 to eliminate scratches left by coarse grinding. Thoroughly clean the workpiece surface before each grit change.
Step 4: Fine Grinding & Polishing
Use Grit 400 or 800 for final finishing. Apply light, even pressure until you achieve the desired surface smoothness.
Step 5: Cleaning & Inspection
After grinding, rinse the workpiece with water or a cleaning agent. Inspect the surface to confirm it meets your quality requirements.
Important Tips
- Wet grinding is recommended — Adding water or cutting fluid reduces heat, extends disc life, improves grinding results, and minimizes dust.
- Control your speed — Adjust equipment RPM based on material hardness and disc size. Excessive speed accelerates disc wear.
- Apply even pressure — Avoid pressing too hard in one area. Keep the disc moving evenly to prevent surface pitting.
- Wear proper protection — Always wear a dust mask, safety goggles, and gloves during grinding.
- Inspect regularly — Check disc wear during use and replace promptly to maintain consistent grinding quality.
Care & Storage
After use, rinse the disc with clean water to remove residual abrasive particles. Allow it to dry completely before storing in a cool, dry, well-ventilated area away from moisture and direct sunlight. Proper care significantly extends the service life of your diamond sandpaper.