Mirka® DEROS II 5650 orbital sander

Mirka DEROS II 5650 orbital sander: the benchmark for handheld power sanding

The Mirka DEROS II 5650 is an electric orbital sander built for professionals who refuse to compromise on finish quality.

With its brushless motor, low vibration, and lightweight design, it handles long sanding sessions without fatigue or loss of performance.

With its 150 mm backing pad and 5 mm orbital stroke, it is just as well-suited to automotive bodywork as it is to wood or composite surfaces.

It is a tool built to last, and one you can find at Dagobert Industrie, backed by the expert advice and service to match.

Presentation of the Mirka DEROS II 5650 orbital sander

The Mirka DEROS II 5650 is a high-end electric random orbital sander designed for demanding professionals in the construction, automotive, and industrial sectors. It succeeds the original DEROS with concrete improvements to handling, power, and durability.

Its 125 mm backing pad and 5 mm orbital throw make it a versatile tool: suitable for fine finishing, moderate stock removal, and surface preparation prior to painting or varnishing.

At Dagobert Industrie, we particularly recommend it for bodywork tasks and flat or slightly curved surfaces where a consistent result is critical.

Detailed technical specifications

• Backing pad diameter: 125 mm
• Orbital throw: 5 mm
• No-load speed: 3,000-10,000 rpm
• Power input: 350 W
• Weight: approx. 0.9 kg
• Abrasive attachment: Velcro (hook-and-loop)
• Integrated dust extraction: yes, extractor compatible
• Power supply: 230 V / 50 Hz

The DEROS II 5650 stands out for its low weight and reduced vibration, two major assets for long work sessions. Operator fatigue is significantly reduced compared to conventional orbital sanders of the same power.

Its electronic speed controller maintains constant speed under load, which guarantees a homogeneous result over the entire surface, even when applying heavy pressure.

Model	Pad	Orbital throw	Weight	Main use
Mirka DEROS II 5650	125 mm	5 mm	~0.9 kg	Finishing / bodywork / industry
Mirka DEROS II 6650	150 mm	6 mm	~1.1 kg	Large surfaces / construction
Festool ETS EC 125	125 mm	3 mm	~1.0 kg	Fine finishing / cabinetry
Bosch PEX 300 AE	125 mm	2.5 mm	~1.5 kg	Semi-professional use

Performance and power: what sets the Mirka DEROS II 5650 apart

The Mirka DEROS II 5650 features a 350 W brushless motor that delivers constant power, even under load. No rpm drop at the end of a stroke.

The speed range is from 4,000 to 10,000 rpm, adjustable via the electronic dial. You can adapt the speed to the material: softwood, varnish, composite, or metal.

The 5 mm orbit offers a good balance between material removal and surface quality. It is the reference value for universal sanding in bodywork and carpentry.

The NVH system (vibration and noise reduction) is particularly refined on this version II. The vibration level drops to 2.5 m/s², well below the statutory daily exposure thresholds.

The integrated Bluetooth connection allows the machine to be controlled via the Mirka app. Usage tracking, parameter adjustment, and maintenance alerts: everything can be managed remotely.

Model	Orbit	Power	Vibration	Connectivity	Main use
Mirka DEROS II 5650	5 mm	350 W	2.5 m/s²	Bluetooth	Universal sanding / bodywork
Mirka DEROS II 3650	3 mm	350 W	2.0 m/s²	Bluetooth	Fine finishing / surface leveling
Festool ETS EC 150/5	5 mm	400 W	3.0 m/s²	No	Wood sanding / varnish
Bosch GEX 150 AC	5 mm	280 W	5.5 m/s²	No	General use

Compatibility and accessories for the DEROS II 5650

Recommended backing pads, interfaces, and consumables

The DEROS II 5650 is designed to work with Mirka backing pads with central mounting, in 125 mm diameter. The original pad supplied with the machine is suitable for the majority of common applications.

For curved surfaces or complex bodywork, a soft pad (hardness 10 or 20) significantly improves contour following. The hard pad remains preferable on flat surfaces for more aggressive material removal.

Between the pad and the abrasive, a Mirka foam interface (3 or 6 mm thick) absorbs residual vibrations and protects the backing. It is particularly useful for finishing on varnish or gel coat.

As for abrasives, the DEROS II 5650 is optimized for Mirka Abranet, Galaxy, and Iridium discs in 125 mm, 8 holes, Velcro attachment. These references cover all uses:

• Abranet, sanding wood, MDF, filler, excellent dust extraction
• Galaxy, bodywork, metal, plastic, clog resistance
• Iridium, paint and varnish finishing, fine to very fine grits

Abrasive	Material	Common grits	Main use
Mirka Abranet	Wood, MDF, filler	P80, P240	Roughing to wood finishing
Mirka Galaxy	Metal, plastic, bodywork	P80, P320	Bodywork and metal sanding
Mirka Iridium	Varnish, paint, gel coat	P320, P1000	Finishing and polish prep

The Ø 27 mm vacuum connection is compatible with most dust extractors on the market. For optimal extraction, an M or L class extractor is recommended.

Comparison: Mirka DEROS II 5650 versus other orbital sanders on the market

The Mirka DEROS II 5650 stands out as a serious benchmark in the handheld orbital sander category. But how does it compare to the competition?

Its main asset: a brushless motor coupled with onboard electronics that maintain constant speed under load. This is a concrete advantage over carbon-brush motor models like the Festool ETS 150/3 or the Bosch GEX 150 AC, which suffer more speed loss under strain.

The 5 mm orbital stroke with a 150 mm pad offers a good compromise between material removal and finish quality. By comparison, the Festool ETS EC 150/3 offers an identical stroke, but at a significantly higher price point.

Model	Motor	Orbital stroke	Pad	Weight	Main use
Mirka DEROS II 5650	Brushless	5 mm	150 mm	~1.0 kg	Bodywork, wood, finishing
Festool ETS EC 150/3	Brushless	3 mm	150 mm	~1.2 kg	Fine finishing, lacquer
Bosch GEX 150 AC	Carbon-brush	5 mm	150 mm	~1.5 kg	General use
Rupes LHR 15 Mark III	Brushless	15 mm	150 mm	~1.3 kg	Bodywork polishing

The DEROS II 5650 stands out with its featherweight of around 1 kg. During an intensive workday, fatigue is significantly reduced compared to a Bosch GEX 150 AC, which is 50% heavier.

Finally, the Bluetooth connectivity with the Mirka app allows real-time tracking of machine parameters, a feature missing on almost all competing models in this price range.

FAQ - Mirka DEROS II 5650

1. What is the difference between the DEROS II 5650 and the DEROS II 5650CV?

The DEROS II 5650 operates at a fixed speed. The CV (Constant Velocity) version automatically maintains rotation speed under load, which prevents slowing down when applying heavy pressure. For intensive use on large surfaces, the CV is recommended.

2. Is the DEROS II 5650 compatible with other brands' abrasives?

Yes. It accepts any Ø 150 mm, 6-hole or multi-hole abrasive. That said, Mirka designs its abrasives (Abranet, Galaxy, Iridium) specifically to optimize extraction and lifespan with this machine. Results are significantly better with Mirka abrasives.

3. Can it be used without dust extraction?

Technically yes, but it is not advised. The DEROS II 5650 is designed to operate in a closed circuit with extraction. Without it, the pores of the abrasive quickly clog, the lifespan of the discs drops, and surface quality degrades.

4. Which orbit to choose: 5 mm or 8 mm?

The 5 mm orbit (model 5650) offers a finer finish, ideal for paint, varnish, and delicate surfaces. The 8 mm orbit (model 8150) removes more material and is suited to sanding primer or raw wood. For bodywork and lacquered finishes, 5 mm is the standard.

5. Is the DEROS II 5650 suitable for amateur use?

It is a professional tool, designed for intensive daily use. An amateur can certainly use it, but they are paying for a level of robustness and ergonomics they may not always fully exploit. If the budget is tight, entry-level alternatives exist. If finish quality is the priority, the DEROS II remains unbeatable in its category.

6. What dust extraction should be used with the DEROS II 5650?

Mirka recommends its own extractors (Mirka DE, DECO or AIR) to guarantee optimal airflow. An M or L class extractor with flow ≥ 170 m³/h is suitable. The important thing: use an extractor with an auto-start socket to trigger suction as soon as the machine runs.