Mirka® DEROS II 325 orbital sander

Mirka DEROS II 325 Orbital Sander, Precision and performance for professional sanding

The Mirka DEROS II 325 is an electric orbital sander designed for professionals who do not compromise on finishing.

Lightweight, quiet, and equipped with a brushless motor, it provides precise and consistent sanding on all surfaces, automotive, wood, and composite.

Its 125 mm backing pad and low vibration reduce fatigue during prolonged use.

Available at Dagobert Industrie, an official Mirka distributor in France.

Presentation of the Mirka DEROS II 325 orbital sander

The Mirka DEROS II 325 is an electric orbital sander designed for professionals who demand precision and consistency on every surface. Its 125 mm backing pad and 3.25 mm orbit make it an ideal tool for finishing work on car bodies, woodwork, and painted surfaces.

The brushless motor ensures increased longevity and constant power, even under prolonged load. Electronic speed management maintains the selected rpm regardless of usage conditions.

The DEROS II 325 integrates natively into the Mirka dust extraction system. Connected to a compatible vacuum, it eliminates up to 99% of generated dust, a concrete benefit for health and finish quality.

Mirka: a leading Finnish manufacturer in abrasives

Founded in 1943 in Finland, Mirka is now world-renowned for its abrasives and sanding machines. The brand notably popularized net abrasives (Abranet range), which limit clogging and extend the life of the discs.

Mirka designs its machines and consumables to work together. Using Mirka discs with the DEROS II 325 means fully leveraging the machine's potential.

At Dagobert Industrie, we offer the complete Mirka range: machines, abrasives, and accessories, to equip your workshop with a coherent and high-performance system.

Technical characteristics and specifications of the Mirka DEROS II 325

The Mirka DEROS II 325 is a compact electric orbital sander designed for work on small surfaces and hard-to-reach areas. Its reduced size makes it a precision tool where a standard sander cannot reach.

It features a 350 W brushless motor. This type of motorization ensures better durability, less maintenance, and precise electronic speed regulation.

The speed is adjustable between 3,000 and 10,000 rpm, with load maintenance. The tool automatically adjusts its speed based on the pressure applied to the workpiece.

77 mm diameter backing pad and 2.5 mm orbit: what is it used for?

The 77 mm diameter backing pad is the central feature of this machine. It is a size designed for touch-ups, edges, corners, and curved surfaces, areas where a 125 mm pad would be too bulky.

The 2.5 mm orbit produces a tight orbital movement. The result: smooth, highly controlled sanding with few residual marks. It is ideal for finishes on car bodies, woodwork, or painted parts.

For comparison, the DEROS II 550CV (125 mm pad, 5 mm orbit) covers larger surfaces but sacrifices precision at the edge of the part. Both machines are complementary in a workspace.

Model	Pad	Orbit	Power	Main usage
Mirka DEROS II 325	Ø 77 mm	2.5 mm	350 W	Finishing, tight areas, touch-ups
Mirka DEROS II 550CV	Ø 125 mm	5 mm	550 W	Rapid surface sanding
Festool ETS EC 125/3	Ø 125 mm	3 mm	400 W	Finishing on large surfaces
Bosch GEX 34-125	Ø 125 mm	3.4 mm	400 W	Versatile wood/metal usage

Comparison: Mirka DEROS II 325 versus other DEROS II models and the competition

The Mirka DEROS II range includes several models that are mainly distinguished by their orbit and their target usage. Here is how the DEROS II 325 is positioned.

Model	Orbit	Pad	Main usage	Strong point
Mirka DEROS II 325	3 mm	125 mm	Fine finishing, bodywork, lacquered wood	Cutting smoothness, impeccable result
Mirka DEROS II 550	5 mm	125 mm	Intermediate sanding, versatile	Good removal/finishing compromise
Mirka DEROS II 650	6 mm	125 mm	Stock removal, flat surfaces	Rapid material removal
Festool ETS EC 125/3	3 mm	125 mm	Finishing, cabinetmaking	Ergonomics, Festool ecosystem
Bosch GEX 125-150 AVE	2.5-5 mm	125/150 mm	Workshop versatile	Accessible price, dual pad

With a 3 mm orbit, the DEROS II 325 is the finishing machine of the range. It leaves a surface almost free of micro-scratches, where a 5 or 6 mm orbit works faster but leaves more marks.

Compared to the Festool ETS EC 125/3, the DEROS II 325 features a slightly lower weight and native Bluetooth connectivity for speed tracking. A concrete advantage in the workshop.

The Bosch GEX remains a generalist option. It is suitable for occasional use, but does not compete in terms of electronic regulation or longevity under intensive professional use.

In summary: choose the DEROS II 325 if your priority is final surface quality, paint, varnish, bodywork, fine wood. To remove material quickly, turn to the 550 or 650.

Compatible accessories and dust extraction system of the DEROS II 325

The DEROS II 325 is designed to work within the Mirka ecosystem. It accepts 125 mm Mirka abrasive discs with Velcro backing, compatible with the entire Abranet, Abralon, Galaxy, and Iridium range.

The backing pad is interchangeable. Mirka offers soft, rigid, or ultra-soft pads depending on the profile of the surface to be worked, ideal for switching from a car body to a flat panel without changing machines.

As for extraction, the DEROS II 325 includes a 27 mm central extraction port. It connects directly to Mirka extractors (DE, CV series) or any industrial vacuum equipped with a compatible nozzle.

The integrated dust extraction sanding system drastically reduces dust during work. Combined with Abranet abrasives, whose mesh structure allows air to pass through, the result is significantly superior to conventional sanding.

Mirka Abrasive	Surface type	Recommended grits	Typical usage
Abranet	Wood, primer, metal	P80, P400	Universal sanding, optimal dust removal
Galaxy	Varnish, lacquer, paint	P400, P1000	Bodywork finishing, fine deburring
Iridium	Sensitive surfaces, composites	P120, P800	Long-life sanding, clogging resistance
Abralon	Curved surfaces, gel coat	P180, P4000	Polishing, ultra-fine finishing

At Dagobert Industrie, we offer Mirka abrasives and accessories compatible with the DEROS II 325 so you can equip your machine in a single order.

Benefits of dust-free orbital sanding with the Mirka DEROS II 325

The Mirka DEROS II 325 integrates an extraction system directly into the sanding pad. Dust is captured at the source, before it can even disperse into the air.

The concrete result: the surface stays clean during work. You see what you are doing, you have better control over the result, and you avoid unnecessary passes.

This dust-free sanding is not just a matter of comfort. It extends the life of the abrasives, reduces clogging, and maintains a constant cut rate throughout the duration of use.

The main daily benefits:

• Integrated extraction effective from the first pass
• Less clogged abrasives, therefore active longer
• Work surface visible at all times
• Reduced dust exposure for the operator
• Less cleaning between sanding steps

On materials like wood, MDF, or composites, dust management radically changes the quality of the final rendering. A 120 grit on MDF without extraction clogs in seconds. With the DEROS II 325, this problem disappears.

Criteria	Mirka DEROS II 325	Festool RO 125	Bosch GEX 125 AC
Integrated extraction	Yes, multi-hole	Yes, via collector	Yes, microfilter
Pad (mm)	125	125	125
Orbit (mm)	3.0	2.5 / 5.0	2.5
Typical usages	Wood, MDF, composites, bodywork	Wood, fine finishing	Wood, light metal
Connectivity	Bluetooth (Mirka OS)	No	No

FAQ - Mirka DEROS II 325

1. Which is the best Mirka sander?

It all depends on the usage. For sanding flat surfaces and bodywork, the DEROS II is the absolute reference in the Mirka range.

If you are working on curved surfaces or hard-to-reach areas, the Mirka DEROS 353 (77 mm pad) will be more suitable. For large surfaces, the DEROS II 5650 with its 150 mm pad takes the advantage.

2. Which is the best orbital sander?

The Mirka DEROS II is among the best electric orbital sanders on the professional market. It stands out for its brushless motor, low vibration, and compatibility with the Mirka integrated extraction system.

Compared to competitors like the Festool ETSC 125 or the Bosch GEX 125, the DEROS II holds up on durability, ergonomics, and sanding precision. Its main asset remains native integration with Mirka Abranet abrasives.

3. Who manufactures Mirka?

Mirka is a Finnish company founded in 1943, belonging to the KWH Group. Its headquarters and main factories are based in Jeppo, Finland.

Mirka is recognized worldwide for its innovative abrasives and electric sanding tools. The brand is particularly present in the automotive, aeronautics, and high-end woodworking industries.

4. What is the difference between the DEROS II 325 and the DEROS II 5650?

The main difference is the pad diameter and the working orbit.

The DEROS II 325 has a 125 mm pad with a 3 mm orbit, ideal for precision sanding, delicate areas, and finishing. The DEROS II 5650 features a 150 mm pad with a 5 mm orbit for faster material removal on large surfaces.

In summary: the 325 for finesse and precision, the 5650 for productivity on large surfaces.