Astro 525C
Score: 78/100
Chicago Pneumatic CP879C
Score: 72/100Rankings
The Astro Pneumatic 525C is a lightweight, reversible pneumatic drill designed for versatile drilling and driving applications with full power in both directions. Its moderate speed and moderate torque make it a balanced tool for general maintenance rather than heavy construction. It is best suited for professionals requiring a portable pneumatic drill where battery tools are impractical.

The Chicago Pneumatic CP879C is a specialized angle air drill designed for precision work in confined automotive and industrial spaces. Its main trade-off is limited torque output, making it unsuitable for heavy-duty large-hole drilling. It is best suited for professionals in body shops and maintenance who need maneuverability over raw power.
| Attribute | Astro 525C | ![]() |
|---|---|---|
1,800 RPM | 2,000 RPMbest | |
20.3 N·mbest | 4.4 N·m | |
| ↓ lower better | 7 CFMbest | 21.2 CFM |
105 PSIbest | 90 PSI | |
0.375 inchesbest | 0.375 inchesbest | |
| ↓ lower better | 2.43 lbsbest | 3.21 lbs |
| ↓ lower better | 7.87 inchesbest | 8.58 inches |
| ↓ lower better | 86.8 dB | 80.6 dBbest |
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| Attribute | Astro 525C | ![]() |
|---|---|---|
Design & Ergonomics(3) | ||
Tool Weight (lbs) | 2.43 lbs | 3.21 lbs |
Overall Length (inches) | 7.87 inches | 8.58 inches |
Handle Style | Straight | Angle |
Compatibility & Air Requirements(2) | ||
Air Consumption (CFM) | 7 CFM | 21.2 CFM |
Operating Pressure (PSI) | 105 PSI | 90 PSI |
Features & Controls(2) | ||
Noise Level (dB) | 86.8 dB | 80.6 dB |
Exhaust Direction | Muffled | Bottom |
Build & Durability(2) | ||
Housing Material | Standard | Aluminum/Composite |
Warranty Length (years) | years | 1 years |
Performance & Power(3) | ||
Free Speed (RPM) (RPM) | 1800 RPM | 2000 RPM |
Torque (N·m) | 20.3 N·m | 4.4 N·m |
Gear Configuration | Planetary | Standard |

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Manufacturer and retailer descriptions emphasize reliability, ergonomics, and suitability for confined-area drilling in MRO applications.
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