Chicago Pneumatic CP9104Q Air Pencil Die Grinder 1/8 Inch
- Maximum Rotational Speed: 60000 rpm
- Power Source: Pneumatic
- Manufacturer Warranty Description: 1 year limited warranty
- Voltage: 40 volts
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
For shops already running compressed air, a 60,000 RPM pneumatic grinder this light is a reasonable pick for detail grinding and deburring work.
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ASIN: B001VXUWSKModel: CP9104QCategory: Power Grinders
Overview
The Chicago CP9104Q is an air powered die grinder built for high speed work such as deburring, port work and light grinding where a cord would get in the way. At 7.04 ounces it stays light through long sessions.
Chicago Pneumatic tools built its name in air powered shop equipment, and this die grinder follows that pattern: small footprint, high RPM ceiling, no motor to overheat. Buyers should confirm compressor CFM and fitting size before ordering, since air tools only perform to the spec of the air feeding them. There is no accessory kit listed here, so a collet or bit may be a separate purchase.
- Pneumatic power source
- 60,000 RPM top speed
- 7.04 ounce weight
- Chicago Pneumatic (CP) model line
Who it's for
Suits metalworkers, fabricators and auto technicians who already run a compressor and need a small grinder for tight spaces. Not a fit for anyone without a shop air line, since this tool has no battery or cord option.
Pros and cons
- Very light at 7.04 ounces for extended use
- High 60,000 RPM ceiling for detail grinding
- Compact pneumatic head fits tight spaces
- Requires a compressor, no cordless option
- No accessories or collet specified
Performance notes
Speed here comes from air pressure rather than a motor winding, so output stays consistent as long as the compressor keeps up with demand at 60,000 RPM. The pneumatic design also keeps the tool head small and light at 7.04 ounces, which matters more than raw power in tight, awkward grinding spots.
Specifications
| Brand | Chicago Pneumatic |
|---|---|
| Model | CP9104Q |
| Dimensions & fit | |
| Item Weight | 0.44 poundslower than 95% of 107 power grinders |
| Dimensions | 7.9 × 6 × 3 inches |
| Capacity & performance | |
| Maximum Rotational Speed | 60000 rpmhigher than 100% of 122 power grinders |
| Minimum Speed | 60000 rpm |
| Power & efficiency | |
| Power Source | Pneumatic |
| Voltage | 40 voltslower than 58% of 103 power grinders |
| Construction & materials | |
| Color | Red |
| Included components | |
| Unit Count | 1 |
| Included Components | Air Pencil Die Grinder; Silencer Hose; Wrench |
| Warranty & support | |
| Manufacturer Warranty Description | 1 year limited warranty |
| Other details | |
| Style Name | Tool Only |
| Item Type Name | Die Grinder |
| Other Special Features Of The Product | Heavy Duty |
| Recommended Uses For Product | Deburring, Grinding |
Closest rivals on specs
Gunpla AT-010K Micro Air Pencil Die Grinder Kit- Item Weight 0.44 vs 0.33 pounds (+33%)
Milwaukee 3485-20 M12 FUEL Right Angle Die Grinder 1/4 Inch- Voltage 40 vs 12 volts (+233%)
- Item Weight 0.44 vs 1.65 pounds (-73%)
M12 2486-20 Straight Die Grinder 1/4 Inch- Voltage 40 vs 12 volts (+233%)
- Item Weight 0.44 vs 1.7 pounds (-74%)
Frequently asked questions
What powers the Chicago CP9104Q grinder?
It runs on compressed air, so it needs a shop compressor rather than a battery or cord.
How fast does the CP9104Q spin?
It is rated to 60,000 RPM, in line with other pneumatic die grinders built for detail work.
How much does the CP9104Q weigh?
It weighs 7.04 ounces, light enough for extended one handed use.