Chicago CP860 Grinder
- Grinder
- 400 watts
- Pneumatic
- 1.26 pounds
A compact, high speed air powered die grinder built for detail work in tight spaces, provided a compressor is already on hand to run it.
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How it ranks among the 150 grinders we track
4.5★ across 167 Amazon ratings, Bayesian-smoothed toward the category average.
167 Amazon ratings, weighted on a log scale so huge counts don't drown everything.
Modest tracked demand last month.
Brand identity, imagery, description and spec coverage.
The ProductDome score is separate from the Amazon rating shown above: it combines the Bayesian-smoothed Amazon rating with evidence volume, tracked demand, and data quality across the 150 grinders we track - how the scorecard works · full grinders data report. Confidence: medium - useful but incomplete evidence.Last refreshed Aug 4, 2026. Data-computed, not a hands-on test. Compiled by the ProductDome Research Team.
Overview
The Chicago CP860 is an air powered grinder that runs at 24,000 RPM with a 400 watt motor. It weighs 1.26 pounds and measures 5.75 by 2 by 4 inches, listed under Tools and Grinders.
The combination of high spindle speed and a compact, sub-1.5-pound body points to a die grinder built for detail work rather than heavy stock removal. It runs on compressed air rather than a plug or battery, so it needs a compressor to operate, and the listing does not detail hose fittings or air consumption.
- 24,000 RPM top speed
- 400 watt motor power
- Weighs 1.26 pounds
- Measures 5.75L x 2W x 4H inches
Who it's for
Buyers who already have a shop compressor and need a light, high speed grinder for deburring, polishing or detail work in tight spaces fit this listing. Anyone without a compressor, or who wants a corded or battery-powered grinder, should look at other options.
Strengths and trade-offs
Drawn from this product's published specifications.
- High 24,000 RPM spindle speed
- Compact and light at 1.26 pounds
- Small 5.75 inch body fits tight spaces
- Requires a separate air compressor
- Hose fitting and air consumption not published
Performance notes
24,000 RPM is a high spindle speed suited to fast work on small bits, deburring and polishing rather than heavy material removal. The 1.26 pound weight and compact 5.75 inch body support extended one-handed use in tight spots, though actual output depends on the connected compressor supplying enough air pressure and volume for the tool.
Specifications
| Brand | Chicago |
|---|---|
| Model | CP860 |
| Dimensions & fit | |
| Item Weight | 1.26 pounds |
| Dimensions | 5.7 × 2 × 4 inches |
| Capacity & performance | |
| Speed | 24000 rpm |
| Power & efficiency | |
| Motor Power | 400 watts |
| Power Source | Pneumatic |
| Voltage | 110 volts |
Other Chicago grinders
How it compares
This product against the closest alternatives we track in grinders.
| Product | Amazon rating | Ratings | ProductDome score |
|---|---|---|---|
| Chicago CP860 GrinderThis product | 4.5 / 5 | 167 | 3.7 / 5 |
| DEWALT DCG413B GrinderDeWalt | 4.8 / 5 | 9,600 | 4.6 / 5 |
| Milwaukee 2880-20 GrinderMILWAUKEE | 4.8 / 5 | 2,400 | 4.5 / 5 |
| AVID MW590 GrinderAVID | 4.5 / 5 | 6,100 | 4.4 / 5 |
| Makita 9557PBX1 GrinderMAKITA | 4.8 / 5 | 3,960 | 4.4 / 5 |
Similar grinders from other brands
Questions about the Chicago CP860
Common buyer questions answered straight from the product spec data - no fluff, no "it depends".
Does the Chicago CP860 need a compressor?
Yes, it is listed as air powered rather than corded or battery driven.
What is the top speed of the CP860?
24,000 RPM according to the published specs.
How much does the CP860 weigh?
1.26 pounds, which makes it light for one-handed use.