Practical Guide
Mirka AOS 130NV 32 mm – Compact Precision Sander for Professionals
The Mirka AOS 130NV 32 mm is a pneumatic orbital sander designed for hard-to-reach areas, spot repairs, and fine surface finishing. With 8,500 rpm and a 3 mm orbit, this tool provides smooth, controlled sanding performance—ideal for precision and repair work.
Technical Overview
| Parameter | Value (reference) |
|---|---|
| Orbit | 3 mm (1/8 in.) |
| Speed | 8,500 rpm |
| Pad diameter | 32 mm (1 1/4 in.) |
| Power | ≈ 357 W (0.48 HP) |
| Air consumption | 509 l/min |
| Operating pressure | 6.2 bar (90 psig) |
| Vibration level | 2.22 m/s² |
| Sound pressure | 75.5 dBA |
Tip: Always use clean, lubricated compressed air and keep working pressure constant at 6.2 bar for maximum efficiency and tool life.
Recommended Settings (Reference Values)
- Working pressure: 6.2 bar (90 psig)
- Air hose Ø 10 mm, max. 8 m length
- Add 2–3 drops of pneumatic oil (e.g. Mobil ALMO 525) before use
- Apply molybdenum disulfide grease every 24 h of use
- Always use a filter-regulator-lubricator (FRL) unit
Professional Workflow – 7 Steps to Efficiency
- Place the tool on a stable surface for safety.
- Check the air system (filter + lubricator + regulator).
- Center the abrasive disc precisely and secure it.
- Place the sander on the workpiece before starting.
- Sand with light, circular movements and even pressure.
- Lift the tool before stopping to avoid edge marks.
- After work, vent and lubricate the tool.
Troubleshooting – Quick Fixes
| Issue | Cause | Solution |
|---|---|---|
| Low speed | Low air pressure or clogged filter | Check pressure (6.2 bar) and clean filter |
| Loud noise | Dirty muffler | Flush or replace muffler |
| Excess vibration | Wrong pad or worn bearing | Use correct pad, check bearings |
| Air leakage | Dirty or damaged O-ring | Clean and replace if needed |
Maintenance – 5 Essential Steps
- Oil daily (2–3 drops of pneumatic oil)
- Check filters and hose connections regularly
- Clean muffler weekly
- Re-grease gearbox every 24 h of heavy use
- Use only genuine parts and approved accessories
FAQ – Frequently Asked Questions
- What air supply is recommended?
Clean, lubricated air at 6.2 bar (90 psig). - Can it be used vertically?
Yes – as long as the user maintains stable footing and grip. - How do I know the bearings are worn?
Increased vibration indicates replacement is needed. - How often should it be greased?
Every 24 hours in continuous use (molybdenum disulfide grease). - What if the motor starts slowly?
Oil the tool and check air pressure.
Conclusion:
The Mirka AOS 130NV 32 mm stands out for its compact design, precision handling, and long-term durability. With correct setup and care, it’s a must-have for spot repair, smart repair, and fine finishing tasks in professional workshops.
