Astro Pneumatic 204 ONYX Composite 1/4" 90° Angle Air Die Grinder
- The Astro Pneumatic 204 (ONYX) is a 1/4 in 90° angle air die grinder engineered for precision grinding, polishing, and finishing tasks. It delivers 20,000 rpm from a compact, vibration-dampened composite body.
- Features:
- Composite handle construction reduces vibration and operator fatigue during extended use.
- Rib-textured grip ensures secure handling even in oily or slippery conditions.
- Lever throttle allows fine feathering control for incremental speed adjustment.
- Rear exhaust directs airflow away from the work surface, helping keep the workspace cleaner.
- Built-in regulator enables on-tool air pressure tuning for better control.
- Specifications:
- Manufacturer: Astro Pneumatic Tool Co.
- Part Number: 204 (ONYX)
- Collet Size: 1/4 in
- Free Speed: 20,000 rpm
- Net Weight: 1.2 lb
- Overall Length: 6-3/4 in
- Air Inlet: 1/4 in NPT
- Recommended Air Pressure: 90-120 psi
- Average Air Consumption: 3 cfm
- The Astro Pneumatic 204 ONYX angle grinder can also be referred to as ONYX angle die grinder 204, 1/4 in 90° air grinder, Astro 204 air grinder, composite body die grinder, and rear exhaust angle grinder.
The Astro Pneumatic 204 ONYX angle die grinder offers reliable performance in a compact, vibration-resistant build, ideal for automotive, metalworking, and fabrication tasks where precision is key.
Q: What applications is the 204 best suited for?
A: It is ideal for grinding, polishing, deburring, and surface finishing in tight areas or on angled surfaces.
Q: What is the ideal operating air pressure?
A: Use 90–120 psi to achieve optimal performance and safe tool operation.
Q: Can I regulate air pressure on the tool itself?
A: Yes — it includes a built-in regulator for on-tool adjustment to suit different tasks and materials.
