Practical Guide
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Mirka DEROS II 550 – Professional sanding with maximum control
The Mirka DEROS II 550 represents the next generation of dust-free sanding. Built for professionals who demand top surface quality with minimal vibration, it combines power, ergonomics, and connectivity. This practical guide shows how to get the most out of the DEROS II 550 in daily use—from base settings to maintenance.
Product overview
| Parameter | DEROS II 550 |
|---|---|
| Power | 400 W |
| Mains voltage | 220–240 V AC |
| Speed range | 4,000 – 10,000 rpm |
| Orbit | 5.0 mm |
| Backing pad | Ø 125 mm |
| Weight | 1.0 kg |
| Bluetooth | Yes – via myMirka app |
71 dB(A)
Sound power level
3.4 m/s²
Vibration value ah
400 W
Continuous power
Tip: When sanding with a soft interface pad, reduce speed to a maximum of 7,000 rpm. This minimizes vibration and produces a more even scratch pattern.
Recommended base settings (guideline values)
- Material: Wood – speed 7,000 – 9,000 rpm
- Filler / primer – 5,000 – 8,000 rpm
- Lacquer / intermediate sanding – 4,000 – 6,000 rpm
- With soft interface pad – max. 7,000 rpm
- With edge protector – normal operation up to 10,000 rpm
Pro workflow in 6 steps
- Connect the power cord correctly (220 – 240 V AC).
- Place the appropriate Mirka Net® abrasive on the pad—centered and flat.
- Attach the vacuum hose and set the dust extractor to auto-start.
- Set speed precisely using Speed + / Speed –.
- Start sanding while in motion—never on a stationary spot!
- Switch the machine off after use and empty the dust bag.
Troubleshooting (4 typical issues)
| Symptom | Cause | Solution |
|---|---|---|
| LED flashes red/green | Incorrect mains voltage | Connect to the correct outlet |
| No function | Cable not properly connected | Check plug / reconnect |
| Speed drops sharply | Overheating / excessive pressure | Reduce pressure briefly, allow to cool |
| Pad brake not working | Brake or bearing worn | Replace brake, check bearing |
Maintenance recommendations
- Disconnect from mains before any maintenance.
- Use Mirka original spare parts only.
- Check the backing pad regularly and replace when worn.
- Keep the pad brake clean—replace if necessary.
- Clean the dust collection daily for consistent suction performance.
FAQ
- How do I connect Bluetooth? Hold the “Speed+” button while turning the machine on—the LED flashes blue and turns solid when connected.
- Which dust extractors are compatible? All Mirka industrial extractors with auto-start.
- How can I reduce vibration? Use a soft interface pad and limit speed to a maximum of 7,000 rpm.
- When should I replace the pad brake? When the pad coasts excessively or rubs.
- How should I store the machine? Clean, dry, and protected—in the original case or a tool cart.
Conclusion
The Mirka DEROS II 550 combines precision, ergonomics, and digital control in a tool no professional workshop should be without. With correct settings, regular maintenance, and dust-free extraction, you’ll achieve consistently top-tier surface results.
