Air Die Grinder CP872 - Compact 27,000 RPM Power Chicago

In this review the Chicago Pneumatic CP872 is evaluated for technicians and hobbyists who need a compact, reliable air die grinder for grinding, polishing and light weld work. The bottom line: the CP872 delivers strong performance from a lightweight package, making it a sensible choice where speed, durability and control matter most. It stands out for its 27,000 RPM top speed and built-in safety features, so users who value a small straight grinder that still handles heavy-duty tasks will find it useful.

Key Features

• Power and speed: The 0.63 HP motor and 27,000 RPM free speed provide the torque and rotational speed needed for efficient grinding and polishing in metal and composites.
• Ergonomic straight head: The lightweight, compact straight design reduces user fatigue during extended use and improves access in tight spots.
• Safety throttle lever: The contoured safety lever locks off to prevent accidental start-ups and gives precise speed control when working at high RPM.
• Integrated regulator and rear exhaust: The built-in pneumatic regulator lets users match speed to the job while rear exhaust directs air away from the workpiece for cleaner operation.
• Versatile collet options: Ships complete with 1/4 in and 6 mm collets to accept a wide range of bits and accessories for porting, deburring and polishing.

Who It's For

The CP872 is best for workshop technicians, automotive detailers, metal fabricators and welders who need a compact die grinder capable of sustained, precision work. Its balance of power and weight suits users who frequently work in confined areas or on detailed finishing tasks where control is important.

It is less suitable for users who require a cordless solution or the absolute quietest tool for occasional hobby use; electric or battery-powered grinders may be a better fit for light, intermittent home tasks or where an air supply is not available.

Pros & Cons

Pros

• High speed and respectable 0.63 HP output make short work of grinding and polishing with appropriate abrasives.
• Compact, straight-body aluminum construction is lightweight and durable for repeated industrial use.
• Built-in regulator and safety throttle offer good control and reduce accidental starts during high-speed operations.

Cons

• Requires an air compressor and hose; not ideal where pneumatic systems are unavailable.
• The tool produces typical pneumatic noise levels, which some users may find loud during extended use.

Specifications

Our Verdict

The CP872 is a practical, value-oriented pneumatic die grinder that combines strong RPM, a lightweight straight-body design and useful safety features, making it a solid pick for professionals and serious hobbyists. For anyone with an existing air system who needs precise grinding, deburring or polishing, it represents good value without unnecessary complexity.

Frequently Asked Questions

Does this grinder include multiple collets?
Yes, it is supplied with a 1/4 in and a 6 mm collet to fit common accessories.

Is the exhaust front or rear?
The unit uses rear exhaust to direct air away from the workpiece and operator.

What air supply does it need?
Expect about 20 CFM at load and a minimum 3/8 in hose; an appropriate compressor is required for sustained use.