Astro 218
Score: 90/100
Ingersoll Rand 308B
Score: 78/100Rankings
The Astro Pneumatic 218 is a lightweight, pencil-style pneumatic die grinder designed for high-speed porting, finishing, and cleaning in tight spaces. It features a 1/8" collet, a free speed of 56,000 RPM, and an ergonomic design that minimizes user fatigue during extended precision work. Best suited for automotive technicians and body shop workers needing precision grinding in confined areas.
The Ingersoll Rand 308B is a lightweight, straight air die grinder designed for precision tasks, featuring a 0.33 HP motor that delivers 25,000 RPM. Its high noise level and significant air consumption are the main drawbacks. It is best suited for professional welders and fabricators needing precision in confined areas where right-angle tools cannot reach.
| Attribute | | |
|---|---|---|
56,000 RPMbest | 25,000 RPM | |
| ↓ lower better | 4 CFMbest | 28 CFM |
| ↓ lower better | 74 dBbest | 103 dB |
| ↓ lower better | 0.07 m/s²best | — |
| ↓ lower better | 0.11 kgbest | 0.46 kg |
133 mm | 174 mmbest | |
— | 246 Wbest | |
368 mmbest | 100 mm |
Click an attribute name to sort · Green = best, red = worst (relative to this comparison)
| Attribute | | |
|---|---|---|
General(1) | ||
Warranty | Manufacturer Warranty | 1 Year |
Safety & Comfort(1) | ||
Noise Level (dB) | 74 dB | 103 dB |
Compatibility & Controls(3) | ||
Collet Size | 1/8" | 1/4 inch, 6 mm |
Switch Type | Twist Throttle | Safety Lock Lever |
Tool Type | Pencil Type | Straight |
Performance(1) | ||
No-Load Speed (RPM) | 56000 RPM | 25000 RPM |
Dimensions(3) | ||
Overall Length (mm) | 133 mm | 174 mm |
Overall Width (mm) | 368 mm | 100 mm |
Overall Height (mm) | 500 mm | 202 mm |
Power & Air(2) | ||
Air Consumption (CFM) | 4 CFM | 28 CFM |
Air Inlet Size | 1/4" | 1/4 inch |
Ergonomics & Build(2) | ||
Weight (kg) | 0.11 kg | 0.46 kg |
Handle Type | Pencil Type | Straight |
Products in the top-left offer the best value (high score, low price).
No independent professional reviews or editorials appear in search results; descriptions from manufacturers and retailers emphasize its suitability for high-speed porting in tight spots and reliability in automotive repair, positioning it as a top choice for body shops and exhaust work.
Search results contain no direct consumer reviews, ratings, or testimonials. Common themes from product pages infer praise for lightweight design and tight-spot access, with no recurring complaints documented.
Professional sources praise the 308B for its powerful 0.33 HP motor and 25,000 RPM speed housed in a compact 6.85-inch body, calling it ideal for industrial-duty tasks with superior ergonomics and long-lasting construction.
Search results lack extensive user reviews, but available notes emphasize praise for its lightweight feel, maneuverability, and consistent power in everyday shop use like de-burring and polishing.
