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‹ Mini & Spot Repair Sanders

10.8V · Brushless

AROS-B 325 Mini & spot repair sander No product photo yet

Mini & Spot Repair Sanders · Mirka 10.8V

Mirka AROS-B 325 10.8V Brushless 77mm Mini Random Orbital Sander (2x 5.0Ah Kit)

10.8V3 years (with registration)

Mirka AROS-B 325: cordless mini random orbital sander, 77mm pad, 2.5mm orbit, 4,000–7,000rpm. Bluetooth.

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77mm

Pad size

2.5mm

Orbit

1.9m/s²

Vibration

Where it sits among 77mm mini & spot repair sanders

Scaled against the 5 mini & spot repair sanders with a 77mm pad we list, so other sizes aren't in the mix. Not a score: bigger isn't always better for your job.

Orbit2.5mm

2.5mm lowestThis onehighest 5mmMirka DEROS II 350

Vibration1.9m/s²

1.6m/s² lowestBosch GEX 12V-77highest 3.3m/s²Mirka DEROS II 350

Noise (LpA)61.6dB(A)

56dB(A) lowestBosch GEX 12V-77highest 67dB(A)Mirka DEROS II 350

Compare it with: + Bosch GEX 12V-77 + Milwaukee M12 FSDR75 + Mirka AROS-B 350

Full specs

From Mirka's own documentation. Checked 10/10/2026. Report a spec error ›

Pad & Sanding

MotionRandom orbit

Pad size77 mm

Orbit2.5 mm

App / BluetoothBluetooth (myMirka app)

Power & Battery

Battery capacity5.0Ah

Batteries in kit2 ×

Battery included✓ Yes

Charger included✓ Yes

Speed & Control

Top speed (rpm)7,000 rpm

Lowest speed (rpm)4,000 rpm

Variable speed✓ Yes

Power & Motor

Voltage10.8V

MotorBrushless

Physical & Build

Noise level61.6 dB(A) LpA / 72.6 dB(A) LwA

Vibration (sanding)1.9 m/s²

Powered by Mirka 10.8V · 2

All 2 batteries that fit this tool, smallest first. Kits and chargers ›

8991122211 2.5Ah · 27Wh 0.18kg No retailer price yet About this battery ›

8991122311 5.0Ah · 54Wh 0.38kg No retailer price yet About this battery ›

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Warranty · 3yr

Up to 3 years2 years as standard, 3 once you register it with Mirka

Register at myMirka within 30 days of purchase for a third year; each tool is registered separately and the cover is not transferable. Tools in continuous industrial use get 1 year. Repairs through a Mirka authorised service centre with the receipt. Batteries: 2+1 years or 300 charges, whichever comes first; a battery and charger bundled with a tool are covered.

Warranty terms are set by the maker and can change. Always confirm current cover on their site before you buy.