DEROS II 550 - Sander Mirka - Free user manual and instructions
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| Product Type | Cordless Random Orbital Sander |
| Brand | Mirka |
| Model | DEROS II 550 |
| Dimensions (L x W x H) | Approx. 250 x 120 x 140 mm |
| Weight (without battery) | Approximately 1.2 kg |
| Power Supply | Li-ion 18 V battery (compatible with Mirka) |
| Motion Type | Random Orbital |
| Pad Diameter | 150 mm (6 inches) |
| Orbital Stroke | 5.5 mm |
| No-Load Speed | 5,000 – 10,000 RPM (variable) |
| Dust Extraction Connection | Yes, compatible with Mirka system |
| Speed Variator | Integrated, electronic adjustment |
| Spindle Lock Type | Yes, for quick pad change |
| Sound Level | Approx. 78 dB(A) |
| Vibration (hand-arm) | < 2.5 m/s² |
| Main Functions | Fine sanding, deburring, polishing with appropriate accessories |
| Maintenance and Cleaning | Clean air vents, change dust extraction pad regularly |
| Safety | Automatic shut-off in case of overload, safety switch |
| Spare Parts Available | Pad, dust extraction pad, batteries, charger, abrasive discs |
| Repairability | High repairability index, parts and manuals available online |
| General Information | Made in Finland, 2-year warranty, compatible with Mirka abrasives |
Frequently Asked Questions - DEROS II 550 Mirka
How to start the DEROS II 550 sander?
Insert a charged battery, then press the on/off button. To adjust the speed, turn the knob located on top of the machine.
What battery to use with the DEROS II 550?
Use exclusively Mirka 18 V Li-ion batteries. Batteries from other brands may damage the tool.
How to change the sanding pad?
Lock the spindle using the lock button, then unscrew the pad counterclockwise. Screw on the new pad and release the lock.
How to adjust the rotation speed?
Turn the speed adjustment knob on top. The range goes from 1 to 6, corresponding to 5,000 to 10,000 RPM.
Does the sander work with a vacuum cleaner?
Yes, it is equipped with a dust extraction connection compatible with Mirka vacuums and standard systems. Make sure the dust extraction pad is clean.
How to clean the sander after use?
Disconnect the battery. Clean the body with a dry cloth, blow out the air vents. Change the dust extraction pad if it is clogged.
What is the noise level of the DEROS II 550?
The sound pressure level is approximately 78 dB(A). Wear hearing protection during prolonged use.
What to do if the sander stops suddenly?
This may be due to overheating or overload. Let the tool cool down for 15 minutes. Check that the battery is not discharged.
What abrasives to use with this model?
Use Mirka abrasives with a 150 mm diameter and hook-and-loop attachment. The grit depends on the application (from P80 to P400 for fine sanding).
Where to find spare parts?
On the official Mirka website or from authorized dealers. Common parts such as pad, dust extraction pads, and batteries are readily available.
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USER MANUAL DEROS II 550 Mirka
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Product information
Brand : Mirka
Model : DEROS II 550
Category : Sander