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Highlights critical safety precautions and compliance with ANSI standards for operating die grinders.
Diagram and list of repair parts for the 21AA82 Speedaire die grinder.
Diagram and list of repair parts for the 21AA84 Speedaire die grinder.
Diagram and list of repair parts for the 21AA85 Speedaire die grinder.
Addresses common problems like moisture, slow operation, and low air pressure, providing step-by-step solutions.
Highlights critical safety precautions and compliance with ANSI standards for operating die grinders.
Diagram and list of repair parts for the 21AA82 Speedaire die grinder.
Diagram and list of repair parts for the 21AA84 Speedaire die grinder.
Diagram and list of repair parts for the 21AA85 Speedaire die grinder.
Addresses common problems like moisture, slow operation, and low air pressure, providing step-by-step solutions.
This document provides operating instructions and a parts manual for Speedaire® Die Grinders, covering models 21AA82, 21AA84, 21AA85, 21AA86, 21AA87, 21AA88, 21AA92, and 21AA93.
Speedaire® die grinders are designed for various high-speed applications, including cleaning tire molding, porting, and general polishing and grinding in confined areas. These tools are engineered for efficiency and user comfort, featuring lightweight construction and reduced operational noise.
The manual details several key technical specifications for each model:
| Model No. | Free Speed (RPM) | Collet Size (Inch) | Horsepower (HP) | Air Inlet (NPT) | Hose Size (Inch) | Average Air Consumption (CFM) | Length (Inch) | Weight (Lbs) |
|---|---|---|---|---|---|---|---|---|
| 21AA82 | 20,000 | 1/4 | 0.35 | 1/4" | 3/8 | 4 | 6-1/2 | 1.1 |
| 21AA84 | 18,000 | 1/4 | 0.5 | 1/4" | 3/8 | 4 | 7-3/8 | 1.5 |
| 21AA85 | 22,000 | 1/4 | 0.5 | 1/4" | 3/8 | 4 | 13 | 2.2 |
| 21AA86 | 22,000 | 1/4 | 0.5 | 1/4" | 3/8 | 4 | 6-11/16 | 1.2 |
| 21AA87 | 22,000 | 1/4 | 0.5 | 1/4" | 3/8 | 4 | 7-3/8 | 1.5 |
| 21AA88 | 22,000 | 1/4 | 0.5 | 1/4" | 3/8 | 4 | 6-3/4 | 1.5 |
| 21AA92 | 56,000 | 1/8 | 0.1 | 1/4" | 1/4 | 1.5 | 5-1/4 | 0.25 |
| 21AA93 | 70,000 | 1/8 | 0.1 | 1/4" | 1/4 | 1.5 | 7-1/8 | 0.31 |
All models are recommended for operation at 90 PSI (6.2 Bar) air pressure.
The Speedaire® die grinders incorporate several features designed for enhanced usability and safety:
For optimal operation, the manual emphasizes the importance of a clean, dry, and lubricated air supply at the proper pressure (90 PSI). It also specifies that only mounted wheels or tire buffing accessories with adequate speed ratings and correct shaft diameters should be used, ensuring that the grinding accessory's rated speed is equal to or greater than the die grinder's speed. Connecting the tool to the air line should be done using appropriate pipe, hose, and fitting sizes, avoiding direct quick coupler installation into the grinder throttle handle.
The manual outlines critical maintenance aspects to ensure the longevity and safe operation of the die grinders:
The manual also emphasizes general safety information, including wearing impact-resistant eye and face protection, hearing protection, and avoiding loose clothing or jewelry due to entanglement hazards. It warns about workplace hazards like slips/trips/falls and the risks associated with inhaling dust or handling debris from the work process, recommending dust extraction and respiratory protective equipment. The document highlights that some dust created by grinding activities may contain chemicals known to cause cancer, birth defects, or other reproductive harm, advising work in well-ventilated areas and use of approved safety equipment.
General