SPEEDAIRE
SPEEDAIRE 21AA85 Straight Die Grinder 0.5 hp 22000 RPM 1/4 in NPT
Straight die grinder with 0.5 hp motor reaches 22000 RPM for medium-duty grinding on ceramic, steel and wood
- 5 hp motor powers medium-duty grinding tasks
- 22000 RPM maximum speed enables fast material removal
- Straight barrel grip design offers controlled handling
- Safety throttle lever prevents accidental start-up
- Includes two spanner wrenches for quick collet changes
SPEEDAIRE 21AA85 Straight Die Grinder
The SPEEDAIRE 21AA85 is a straight die grinder built for medium-duty material removal. It operates at a maximum speed of 22000 RPM with a 0.5 hp motor. The tool accepts 1/4 in accessories via its collet and connects to a compressed air supply through a 1/4 in NPT female inlet. It is suited for technicians working on ceramic, steel or wood components.
Installation and Common Issues
Connect the grinder to a clean, regulated air line using the 1/4 in NPT female fitting. The barrel grip design allows direct handling during operation. A safety throttle lever prevents accidental start-up and anti-restart technology adds a layer of protection after pressure drops. Two spanner wrenches are included for collet changes. The most common issue is reduced speed or premature wear caused by contaminated or unlubricated air supply.
Ideal Users and Limitations
This grinder suits metalworkers, fabricators and maintenance crews who need a compact straight tool for porting, deburring or finishing tasks. The included carry case supports organised storage and transport. Buyers who require an angled head for tight corners or a larger collet capacity for heavy stock removal should consider alternative configurations. Those without an existing compressed air system will need to source that separately.
Highlights
- 5 hp motor powers medium-duty grinding tasks
- 22000 RPM maximum speed enables fast material removal
- Straight barrel grip design offers controlled handling
- Safety throttle lever prevents accidental start-up
- Includes two spanner wrenches for quick collet changes
Specifications
| Brand | SPEEDAIRE |
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Questions about this item
How can I confirm the 0.5 hp motor reaches 22000 RPM under load?
Listen for steady high-pitched airflow and feel consistent barrel-grip vibration; the safety throttle lever should return instantly when released.
What comes in the box and what must I supply?
The case holds the bare straight die grinder and two spanner wrenches; you must provide a 1/4 in NPT female air hose, regulator, lubricator and 1/4 in collet accessories.
Which collet size matches the 21AA85 for steel work?
The grinder accepts a 1/4 in collet, which is the size specified for ceramic, steel and wood applications.
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