SPEEDAIRE
SPEEDAIRE 21AA96 air compressor 5-1/2 in pad 16000 rpm
Air-powered disc sander with a 5-1/2 inch pad, 16000 rpm variable speed and 0.4 hp motor for medium-duty sanding
- Variable speed control for precise finishing
- 16000 rpm maximum disc speed for fast material removal
- 4 hp motor delivers consistent power
- 21 cfm air consumption at 90 psi operating pressure
- Pistol grip design with front exhaust directs airflow away
SPEEDAIRE 21AA96 air sander
The SPEEDAIRE 21AA96 is a 5-1/2 inch air-powered disc sander built for medium-duty surface preparation. Its 0.4 hp motor delivers up to 16,000 RPM through a variable-speed trigger for controlled material removal. The pistol-grip design suits technicians and fabricators who need one-handed handling on vertical or overhead work. A threaded shank secures abrasive discs directly to the 7/8 inch arbor.
Upgrade from smaller orbital sanders
This sander replaces low-speed orbital tools when aggressive stock removal on metal or fiberglass is required. The jump is worth it when a 21 cfm air supply at 90 psi is already available and the job demands a 5-1/2 inch cutting diameter. Shops limited to lower compressor output or finer finishing grits will not benefit from the higher airflow demand. The front exhaust directs debris away from the workpiece during heavy cuts.
Practical limits of 1/4 inch NPT supply
The 1/4 inch NPT air inlet and 3/8 inch minimum hose size set the flow ceiling for this tool. Running longer hoses or adding quick-connect fittings can drop pressure below the 90 psi requirement and reduce the 16,000 RPM target. The non-vacuum design means dust extraction relies entirely on external capture or respiratory protection. California Proposition 65 warnings apply to chemicals present in the tool materials.
Highlights
- Variable speed control for precise finishing
- 16000 rpm maximum disc speed for fast material removal
- 4 hp motor delivers consistent power
- 21 cfm air consumption at 90 psi operating pressure
- Pistol grip design with front exhaust directs airflow away
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
What air hose size and inlet fitting does the 21AA96 require?
Connect a minimum 3/8 in hose to the 1/4 in NPT air inlet for proper airflow.
How do I attach a disc to the threaded shank without it loosening at 16000 rpm?
Thread the abrasive onto the 7/8 in arbor shank by hand, then snug with the supplied wrench so vibration cannot back it out.
When should I lubricate the motor and check the pad on this 0.4 hp sander?
Add a few drops of air-tool oil into the inlet before each shift and replace the 5-1/2 in pad when the hook face no longer holds discs flat.
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