How to Choose Angle Grinder Grinding Discs for Stone: Dry vs. Wet Polishing Pads and Grit Analysis
In stone processing and renovation, the angle grinder is an indispensable tool, and selecting the right grinding disc is crucial. This article will guide you through the differences between dry and wet polishing pads, as well as how to choose the right grinding disc based on grit.
Dry Polishing Pads vs. Wet Polishing Pads
Dry Polishing Pads
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Suitable for environments with little or no water
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Generates more dust, requiring dust extraction equipment
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Ideal for small repairs or situations where water use is impractical
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Due to high temperatures and friction, it can generate heat, requiring intermittent use to avoid overheating
Wet Polishing Pads
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Requires water for cooling, reducing dust and improving durability
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Provides a finer polishing effect, suitable for high-end stone polishing
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Ideal for large-scale processing, reducing wear and extending lifespan
The Effect of Grit: Grinding Results from #50 to #2000
The grit of the polishing pad determines the degree of refinement in the grinding process. The lower the grit number, the stronger the cutting power; the higher the grit, the finer the surface finish.
| Grit Range | Function |
|---|---|
| #50 - #200 | Initial grinding, removing deep scratches and surface irregularities |
| #400 - #800 | Medium grinding, reducing coarse marks and smoothing the surface |
| #1000 - #1500 | Fine grinding, improving gloss and reflective effect |
| #2000 and above | Polishing, achieving a mirror-like finish |
DIY User Case Studies
Case 1: Kitchen Countertop Renovation
If you've bought a second-hand granite countertop, you can use a dry polishing pad with grit #50-#200 to remove surface stains and light scratches. Then, switch to a grit #400-#800 pad for medium polishing to make the surface smooth. Finally, use a wet polishing pad with grit #1500-#2000 to achieve a high-gloss finish and give the countertop a fresh look.
Case 2: Outdoor Stone Path Repair
If your backyard stone path has become rough and faded due to prolonged use, start with a dry polishing pad with grit #100 to remove surface dirt, then use a grit #400-#800 pad for finer grinding to restore its original shine. Lastly, use a wet polishing pad with grit #1500 or higher to polish, making the stone surface more durable and slip-resistant.
Case 3: Bathroom Marble Floor Renovation
If you want to DIY-renovate your bathroom, start with a dry polishing pad with grit #50 to remove water stains and light scratches. Next, use a wet polishing pad with grit #400-#800 to make the floor smoother. Finally, select a wet polishing pad with grit #2000 to achieve deep polishing and a professional-level mirror finish on the marble surface.
How to Choose the Right Polishing Pad?
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Choose Based on the Work Environment: If working indoors and water is not easily accessible, choose dry polishing pads; if water use is possible, prefer wet polishing pads for better results and durability.
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Choose Grit Based on the Polishing Stage:
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Need to quickly remove surface imperfections? Choose grit #50-#200.
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Want a smooth surface? Choose grit #400-#800.
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Aiming for a high-gloss finish? Choose grit #1000-#2000 and above.
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The choice of grinding disc for your angle grinder directly impacts both the polishing result and work efficiency. Dry polishing pads are suitable for small-scale dry grinding operations, while wet polishing pads are better for large-scale and high-gloss polishing. By selecting the appropriate grit, you can achieve a range of effects, from coarse grinding to a mirror-like finish. A well-chosen polishing pad will make your stone processing more efficient and professional!
