Mirka® DEROS II 550 orbital sander

Mirka DEROS II 550 Orbital Sander, Complete Overview

The Mirka DEROS II 550 is an electric orbital sander designed for professionals who refuse to compromise on finish quality.

Lightweight, quiet, and precise, it is the go-to tool for automotive sanding jobs, surface preparation, and wood or metal finishing.

With its 5 mm orbit and brushless motor, it provides constant power without excessive vibration, even during prolonged use.

At Dagobert Industrie, an official Mirka distributor, you have access to the full range, supported by local technical expertise.

What is the Mirka DEROS II 550 orbital sander?

The Mirka DEROS II 550 is an electric random orbital sander designed for professionals in body shops, carpentry, and surface treatment.

It succeeds the first-generation DEROS with notable improvements: better ergonomics, an optimized motor, and more precise electronic control.

Its 125 mm backing pad and 5 mm orbital throw (hence the "550" in its name) make it a versatile tool, capable of sanding efficiently without burning the surface.

Detailed Technical Specifications

• Pad diameter: 125 mm
• Orbital throw: 5 mm
• No-load speed: 3,000-10,000 rpm (adjustable)
• Power input: 350 W
• Weight: approximately 0.9 kg
• Dust extraction connection: 27 mm
• Abrasive attachment: Velcro (hook-and-loop)

The built-in electronic variable speed control allows you to adapt the speed to the material being worked on: wood, metal, composite, paint, or varnish.

The DEROS II 550 is compatible with all Mirka Abranet and Galaxy abrasives, which guarantees optimal extraction thanks to the multi-hole discs.

At Dagobert Industrie, we offer this sander as an essential benchmark for workshops that demand precision, comfort, and daily durability.

Performance and power: what the DEROS II 550 brings to the job site

The Mirka DEROS II 550 features a 550 W brushless motor. This is sufficient for tackling hard surfaces without losing consistency.

The brushless system reduces mechanical wear. Result: less maintenance, a longer service life, and stable torque over time.

The speed is adjustable from 4,000 to 10,000 rpm. You can easily adapt the aggressiveness to the material: raw wood, primer, varnish, metal, or composite.

The 5 mm orbit offers a good balance between material removal and finish quality. It is suitable for both heavy-duty sanding and preparation before painting.

Its low weight, approximately 900 g, reduces fatigue during prolonged use. On an automotive or woodworking job site, that makes all the difference over a full day.

Model	Power	Orbit	Weight	Primary Use
Mirka DEROS II 550	550 W	5 mm	~900 g	Versatile sanding, finishing
Mirka DEROS II 650	650 W	5 mm	~950 g	Harder surfaces, intensive material removal
Festool ETS EC 150	400 W	5 mm	~1,100 g	Wood finishing, fine cabinetry
Bosch GEX 150 AC	370 W	4 mm	~1,200 g	Wood sanding, occasional use

Compared to the competition, the DEROS II 550 stands out for its power-to-weight ratio. It remains light where other tools with similar power become heavy in the hand.

Mirka DEROS II 550 orbital sander vs. competitors: comparison table

Comparison with other orbital sanders on the market

The Mirka DEROS II 550 is positioned in the high-end segment of electric orbital sanders. Here is how it compares to its main direct competitors.

Model	Manufacturer	Motor	Orbit	Pad	Weight	Key Strength
DEROS II 550	Mirka	550 W electric	5 mm	Ø 150 mm	~1.0 kg	Lightweight, low vibration, integrated extraction
ETS 150/3 EQ	Festool	400 W	3 mm	Ø 150 mm	~1.2 kg	Very fine finishing, Festool ecosystem
ETS 150/5 EQ	Festool	400 W	5 mm	Ø 150 mm	~1.2 kg	Versatility: finishing/heavy-duty
GEX 125-150 AVE	Bosch Pro	400 W	4 mm	Ø 150 mm	~1.5 kg	Price-to-performance ratio, robustness
RO 150 FEQ	Festool	720 W	5 mm	Ø 150 mm	~1.9 kg	Eccentric + rotary mode, high material removal

The DEROS II 550 stands out for its exceptionally low weight of around 1 kg. This is a decisive advantage for long-duration work: automotive bodywork, sanding large surfaces, lacquer finishing.

In terms of power, its 550 W surpasses the standard Festool ETS range. The speed remains stable under load thanks to the electronic regulation.

The integrated central dust extraction is a key Mirka strength: the micro-perforated pad captures dust directly at the source, without cumbersome external bags or adapters.

Compared to the Festool RO 150, the DEROS II 550 is lighter and more economical in use, even though it does not offer the rotary mode. For fine sanding and finishing, it remains the most logical choice.

Accessories and consumables compatible with the DEROS II 550

The Mirka DEROS II 550 uses a 150 mm pad. It accepts all Mirka Velcro-backed abrasives, which simplifies changes during work.

The benchmark abrasive for this machine is Mirka ABRANET. Its net structure allows for optimal extraction and reduces clogging. Result: a significantly longer service life than conventional abrasives.

For finishing varnish or dual-coat paint, Mirka BASECUT and Mirka GOLDFLEX SOFT are particularly suitable. They offer a clean cut without risk of burning on sensitive surfaces.

The available grits cover a wide spectrum:

• P80 to P180 for heavy-duty sanding and shaping
• P220 to P400 for preparation before priming
• P500 to P1000 for finishing and intermediate sanding

The sanding pad is replaceable. Mirka offers several hardness levels (soft, medium, hard) depending on the surface profile. A soft pad follows contours better, while a hard pad is essential for flat surfaces.

For extraction, the DEROS II 550 connects directly to Mirka DE and CV extractors via the standard 27 mm connector. It remains compatible with most extractors on the market equipped with the same connector.

Why choose the Mirka DEROS II 550 for dust-free sanding?

The Mirka DEROS II 550 is designed from the ground up for clean sanding. Its integrated extraction system captures dust at the source, before it disperses into the air.

The 150 mm pad is drilled with 67 holes distributed across the entire surface. Result: a homogeneous extraction flow, with no dead zones, regardless of the tool's position.

The 550 W brushless motor maintains constant speed even under load. No loss of RPM during the final sanding stages, no marks on the surface.

The 5 mm orbit offers a good balance between material removal and finish quality. It is suitable for both heavy-duty sanding and preparation before painting.

The DEROS II 550 connects to any Mirka-compatible vacuum or industrial extractor via the standard fitting. It integrates easily into an existing workstation.

Model	Motor	Pad diameter	Orbit	Primary Use
Mirka DEROS II 550	Brushless 550 W	150 mm	5 mm	Finishing, paint prep
Mirka DEROS II 650	Brushless 650 W	150 mm	5 mm	Intensive heavy-duty, sustained use
Festool ETS EC 150/5	Brushless 400 W	150 mm	5 mm	Wood finishing, light automotive
Bosch GEX 150 AC	Brushed 350 W	150 mm	5 mm	Occasional use, advanced DIY

At Dagobert Industrie, we recommend the DEROS II 550 for automotive, woodworking, and industrial finishing workshops that want to eliminate airborne dust without compromising productivity.

FAQ - Mirka DEROS II 550 orbital sander

1. What is the difference between the DEROS II 550 and the DEROS II 650?

The main difference is the pad size: the 550 uses a 125 mm pad, while the 650 uses a 150 mm pad.

The 550 is more maneuverable, making it ideal for curved areas, edges, and small surfaces. The 650 covers large, flat surfaces more quickly.

For automotive or fine woodworking, the DEROS II 550 is often preferred.

2. Is the DEROS II 550 compatible with Mirka Abranet abrasives?

Yes, it is fully compatible with Mirka abrasives: Abranet, Abranet Ace, Galaxy, Iridium, and more.

The 125 mm Velcro pad accepts all hook-and-loop sanding discs on the market, not just Mirka’s.

That said, Mirka abrasives are optimized to work with the DEROS II's integrated extraction system.

3. Can the DEROS II 550 be used without extraction?

Technically yes, but it is highly discouraged. The DEROS II 550 is designed around its integrated extraction: without it, performance drops and dust accumulates.

Connecting a vacuum or extraction unit remains essential for professional use and for preserving the machine's service life.

4. What orbital speed should I choose for the DEROS II 550?

The machine offers 6 adjustable speeds, from 4,000 to 10,000 rpm.

In practice: low speed for sensitive materials (lacquers, fresh primer), high speed for material removal on wood or metal.

The electronic regulation maintains constant speed under load, which prevents marks and ensures a uniform result.

5. Does the DEROS II 550 replace a standard eccentric sander?

In the majority of cases, yes. The brushless technology and 5 mm orbit provide a level of finish comparable to a high-end pneumatic sander.

It is suitable for automotive bodywork, carpentry, industrial painting, and surface preparation in general.

For very heavy material removal work, a belt sander or angle grinder remains more appropriate.

6. At Dagobert Industrie, what accessory do you recommend with the DEROS II 550?

We recommend pairing it with a Mirka extraction unit (such as the DE or CEROS series) to fully exploit the dust-free system.

Regarding abrasives, Mirka Abranet Ace 125 mm discs are an excellent starting point: long service life, effective anti-clogging, and suitable for most materials.

A Mirka starter kit with an assortment of grits (P80 to P320) allows you to cover all sanding stages without switching machines.