Chicago CP860 Grinder Review
Our verdict
The Chicago CP860 is a 400-watt air-powered die grinder that trades raw spin speed for torque-oriented grunt, making it a capable pick for sustained grinding and surface work at a mid-range price of $121.18.
Check price on AmazonBest for
Shop users who need consistent torque for longer grinding sessions and have a stable air supply
Skip if
You need the highest possible RPM for finishing or porting work, or have a low-output compressor
- Power Source Air Powered
- Voltage 110 Volts
- Speed 24000 RPM
- Motor 400 watts
- Weight 1.26 Pounds
- Dimensions 5.75"L x 2"W x 4"H
- Priced 42% above the category median ($85.49 across 39 tracked models)
Our scorecard
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Owner rating4.5/5
4.5 average across 167 owner ratings
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Popularity1.8/5
167 owner reviews, fewer than most models here
The overall score is owner satisfaction weighted by how many reviews back it, so a high rating from few reviews counts for less. The bars below show where this model stands against the other power tools and workshop machinery we track in this category on price, popularity and size. Context, not marks against it, and our read of the data, not a lab test.
Overview
The Chicago CP860 runs on air power with a published 400-watt motor and spins at 24000 RPM. While that RPM figure is lower than some peers, the 400-watt motor output suggests it is built for sustained torque rather than top-end speed. The compact body measures 5.75 inches long by 2 inches wide by 4 inches tall, and weighs 1.26 pounds, giving it a substantial but manageable feel in the hand.
At $121.18 and a 4.5-star rating from 167 reviews, the CP860 sits in the mid-range tier. Demand as measured by monthly purchases is not currently tracked in the data, but the review count and rating suggest a consistent user base. Based on specs and verified owner reviews, it appeals to those who value a torque-capable motor over maximum RPM.
The 110-volt specification is listed in the product data; while die grinders are pneumatic tools and voltage figures in this context likely refer to the compressor power requirement or ancillary spec, buyers should verify compatibility with their air supply setup before purchase.
Pros
- Published 400-watt motor for consistent torque during extended use
- Compact dimensions at 5.75 inches long for tight-space access
- 4.5-star rating from 167 verified reviews
- Manageable 1.26-pound weight for a motor in this power class
Cons
- 24000 RPM is on the lower end compared to competing air die grinders in this price range
- Higher price at $121.18 without proportionally higher demand signal
- Air consumption and CFM requirements are not published in the listing specs
Specifications
| Power Source | Air Powered |
|---|---|
| Voltage | 110 Volts |
| Speed | 24000 RPM |
| Motor | 400 watts |
| Weight | 1.26 Pounds |
| Dimensions | 5.75"L x 2"W x 4"H |
Performance notes
With a 400-watt motor and 24000 RPM, the CP860 is better suited to grinding, rust removal, and weld prep than to high-speed finishing or porting. The 1.26-pound weight is moderate, and the 5.75-inch body length keeps it accessible in confined areas. Air-powered operation requires a compressor; no specific PSI or CFM figures are published.
What buyers say
Owners tend to praise the solid build quality and consistent power output. The lower RPM rating versus price is the most commonly noted trade-off. Reviewers appear to use it in auto body and metal fab environments where torque matters more than raw speed.
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Frequently asked questions
What does the 400-watt rating mean on an air-powered grinder?
For the Chicago CP860, the 400-watt figure is a published motor output spec. On an air tool, actual performance depends on your compressor's PSI and CFM delivery, so verify those requirements before use.
How does the CP860 compare in weight to lighter die grinders?
At 1.26 pounds it is heavier than ultra-light options like the NEIKO 10649A (0.25 lbs), but that extra mass often reflects a more robust motor housing suited to extended use.
Still have questions about the Chicago CP860?
Send us a note at hello@toolgalaxy.com and we will point you to the right option for your needs.