Mirka Q.Silver Sanding Discs - 77mm - P500 Grit
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Product Information
Full details
The Mirka Q.Silver P500 sanding discs are designed for professional automotive technicians and woodworkers who require high-performance, consistent material removal. These 77mm discs provide a balanced approach to sanding, offering enough aggression for surface refinement while leaving a smooth, uniform finish for subsequent coating layers. A primary caveat to keep in mind is that at a P500 grit, these discs are intended for intermediate surface preparation and are not suitable for aggressive stripping of heavy paint or thick rust.
All features
| Model Part Number | 366JT09951 |
|---|---|
| Brand | Mirka |
Extended Product Information
FAQs
Can I use these discs on wood?
Yes, they are highly effective for fine sanding on wood surfaces, particularly between coats of finish.
Does this disc have vacuum holes?
The product features a plain hook and loop backing for standard applications; verify your specific model requirements regarding hole patterns.
What is the primary application for P500 grit?
P500 is typically used for intermediate sanding, such as leveling primer or preparing surfaces for paint.
Are these discs waterproof?
These are primarily designed for dry sanding applications.
How many discs are in a box?
This product contains 100 discs per pack.
Will these fit a standard 5-inch sander?
No, these are 77mm (approx. 3-inch) discs and require a specifically sized 77mm backing pad.
Troubleshooting
Disc detaches from the backing pad during use
Ensure the backing pad is clean and free of dust. If the hook and loop hooks on the pad are worn down, replace the backing pad.
Premature clogging of the abrasive
Check that the sander’s dust extraction system is functioning correctly or reduce the amount of down-pressure applied to the tool.
Pros and Cons
Pros
- Consistent scratch patterns provide superior finish quality
- Hook and loop system facilitates quick disc swaps
- Durable mineral composition resists premature clogging
- Versatile for both automotive refinishing and general woodworking
- Compact 77mm size is excellent for precision work
Cons
- Not intended for heavy-duty material stripping
- Requires a 77mm backing pad for compatibility
- May require more frequent changes if used on soft wood surfaces
Setup, Compatibility & Care
To begin using your Mirka Q.Silver discs, ensure your sander is fitted with a clean, high-quality 77mm hook and loop backing pad. Simply align the disc holes (if applicable) and press firmly onto the pad to engage the adhesive mechanism.
To prolong the life of the discs:
- Keep the working surface clean of excessive debris.
- Do not apply excessive pressure; let the machine speed and abrasive do the work.
- Store in a cool, dry environment to prevent the backing from losing its adhesive strength.
- If the disc becomes clogged with dust, use a dedicated abrasive cleaning stick to restore its cutting ability.