The Chicago Pneumatic CP870 air sander offers a compelling option for woodworkers, DIYers, and home improvement enthusiasts seeking a versatile pneumatic tool. Featuring both random orbital and rotary sanding modes, it promises smooth, controlled operation driven by compressed air at speeds up to 10,000 RPM. This review assesses its performance, build, value, and compares it with similar tools to help U.S. buyers make an informed purchase decision.
First Impressions and Overall Rating of the CP870 Air Sander
The CP870 earns a solid 4.6 out of 5 stars from over 260 user ratings, reflecting high satisfaction with its functionality and value. Priced typically in the moderate category for pneumatic sanders, it suits users who want professional features without a premium price tag. While it excels in delivering smooth sanding action and versatility, some concerns about durability and power drop slightly lower its score.
Detailed Specifications Outline
| Feature | Specification |
|---|---|
| Brand | Chicago Pneumatic |
| Model Number | CP870 |
| Pad Size | 6 inches (150 mm) |
| Maximum Speed | 10,000 RPM |
| Power Source | Compressed Air |
| Weight | 4.25 pounds |
| Air Consumption | 5 CFM (cubic feet per minute) |
| Sound Level | 94 dB |
| Grip | Insulated with lock-off throttle |
| Warranty | 1 year limited |
What Users Appreciate and Common Critiques
User reviews highlight the smooth operation and excellent sanding performance as major strengths. Approximately 75% of reviewers praise its ease of handling and the quality of finish it provides on various surfaces. One customer said, “Feels great in the hand and delivers consistent results on wood and filler.” Another commented, “Perfect for prep work before painting; blends out edges nicely.”
However, feedback on build quality is mixed with about 20% noting concerns. Some users describe the sander as “sturdy and durable,” while others mention it “feels cheaply made” or show signs of faster wear. The most significant negative point, cited by around 15%, involves power loss and premature failure issues, which may affect heavy or professional users.
- Positive: Smooth, controlled sanding with both rotary and orbital options
- Mixed: Build quality perceptions vary from robust to fragile
- Negative: Occasional reports of power loss and tool failure
Comparing the CP870 Against Similar Pneumatic Sanders
| Feature / Model | Chicago Pneumatic CP870 | Ingersoll Rand 314B | Dynabrade 59023 |
|---|---|---|---|
| Pad Size | 6 inches | 5 inches | 6 inches |
| Speed (RPM) | 10,000 | 12,000 | 10,000 |
| Weight | 4.25 lbs | 3.6 lbs | 4.5 lbs |
| Features | Random/rotary, power regulator, insulated grip | Random orbit, compact design | Random orbit, low vibration |
| Noise Level | 94 dB | 90 dB | 92 dB |
| Typical Price Tier (est.) | Moderate | Moderate to High | Moderate to High |
The Chicago Pneumatic CP870 competes well on versatility and price but lags slightly behind the Ingersoll Rand 314B in speed and noise. Dynabrade offers advanced vibration control but at a higher cost. For buyers prioritizing functionality and budget, the CP870 represents strong value.
Recommended Buyers and Those Better Off Waiting
- Ideal for: DIY enthusiasts, hobbyist woodworkers, rust removal tasks, and pre-paint surface preparation
- Recommended for: Users with access to a reliable compressed air system needing a dual-mode sander
- Less suitable for: Heavy professional workshops requiring maximum durability and zero power loss risk
- Not advisable for: Those who prefer electric or battery-operated sanders or seek ultra-quiet tools
Price Insight and Purchase Timing
The CP870 originally retails around a moderate entry price point for pneumatic sanders with consistent availability on sale. While exact prices fluctuate, buyers should look for deals under $150 to maximize value. Its longstanding market presence since 2004 means used options may also be found affordably. Given mixed durability reports, purchasing new from authorized sellers is recommended to secure warranty coverage.
Frequently Asked Questions About the Chicago Pneumatic CP870
Q1: Is the CP870 compatible with standard shop air compressors?
A1: Yes, it requires a 1/4-inch NPTF air inlet and typically consumes 5 CFM, so any standard compressor that meets these specs can power it effectively.
Q2: Does this sander have a vacuum dust collection feature?
A2: No, the CP870 is a non-vacuum model and does not include integrated dust extraction capabilities.
Q3: Can the speed be adjusted during operation?
A3: Yes, there is a built-in power regulator allowing users to precisely control sanding speed as needed.
Q4: What kind of grip does the sander have for user comfort?
A4: It features an insulated grip designed to reduce vibration and heat transfer, plus a lock-off throttle to prevent accidental starts.
Q5: Are replacement parts like sanding pads easily available?
A5: Replacement pads and accessories conform to standard PSA hook-and-loop systems and are widely available from multiple suppliers.
Final Thoughts: Is the CP870 Worth Buying?
The Chicago Pneumatic CP870 offers a compact, metal-bodied solution blending random orbital and rotary sanding modes. Its powerful 10,000 RPM motor and adjustable speed make it excellent for fine finishing, filler blending, and paint prep. While it stands out for smooth operation and value, prospective buyers should weigh mixed durability reports and occasional power loss issues. Overall, it suits hobbyists and light professional users well, especially when purchased new to ensure warranty support and reliable performance. This model remains a solid contender in the moderately priced pneumatic sander market.