Introduction
This manual provides essential instructions for the safe and effective operation, setup, and maintenance of your Chicago Pneumatic CP7115 Compact Air Powered Needle Scaler. This tool is designed for demanding applications such as rust removal, surface clean-up, and wheel drum clean-up, offering a balance of power and ergonomic comfort.
Safety Information
WARNING: Operating this tool can expose you to chemicals including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.
Always observe general safety precautions when using pneumatic tools:
- Wear appropriate personal protective equipment (PPE), including eye protection, hearing protection, and gloves.
- Ensure the air supply is disconnected before performing any maintenance, changing accessories, or when the tool is not in use.
- Maintain a secure grip on the tool during operation.
- Keep work area clean and well-lit.
- Do not exceed the maximum recommended air pressure of 90 PSI.
- Inspect the tool and needles for damage before each use. Replace worn or damaged parts immediately.
Product Overview
The Chicago Pneumatic CP7115 is a compact and powerful air-powered needle scaler designed for efficient material removal. Its ergonomic design ensures comfortable handling during extended use.
Key Features:
- Speed and Power: Delivers 4000 blows per minute for efficient rust and surface material removal.
- Ergonomics: Lightweight at 2.87 lbs (1.3 kg) and compact with a length of 11.42 inches (290 mm) for comfortable operation.
- Versatile Application: Ideal for reaching surfaces in confined spaces, rust removal from chassis, and cleaning steel wheel drums.

Figure 1: Front view of the Chicago Pneumatic CP7115 Needle Scaler. This image shows the tool's compact design with its red and black housing and the needle bundle extending from the front.
Setup
- Air Supply Connection:
- Ensure your air compressor is capable of providing sufficient airflow and pressure (up to 90 PSI).
- Connect an air hose to the tool's air inlet. It is recommended to use an inline air filter/lubricator to ensure clean, lubricated air, which extends tool life.
- Verify all connections are secure to prevent air leaks.
- Needle Installation/Inspection:
- The CP7115 uses 1/8 inch diameter needles. Ensure the needle bundle is correctly seated and free from damage.
- If replacing needles, refer to the maintenance section for proper procedure.
- Pressure Adjustment:
- Adjust the air pressure regulator on your compressor to a maximum of 90 PSI. Higher pressures can damage the tool and pose a safety risk.
Operating Instructions
Before operating, ensure all safety precautions are followed and the tool is properly set up.
- Prepare Workpiece: Secure the workpiece to prevent movement during scaling. Clear the area of any loose debris.
- Grip the Tool: Hold the needle scaler firmly with both hands if possible, maintaining a secure grip on the handle.
- Activate Tool: Depress the trigger to start the needle action. The needles will rapidly strike the surface.
- Apply to Surface: Gently press the needle bundle against the surface to be scaled. Move the tool slowly and evenly across the area. Avoid excessive force, as the tool's action is designed to do the work.
- Targeted Applications:
- Rust Removal: Apply the needles directly to rusted areas. The rapid impacts will break away rust and scale.
- Surface Clean-up: Use for preparing metal surfaces by removing paint, slag, or other coatings.
- Confined Spaces: The compact design of the CP7115 makes it suitable for accessing tight areas where larger tools cannot reach.
- Deactivate Tool: Release the trigger to stop the needle action.
- Disconnect Air: Always disconnect the air supply when finished with the tool or before making any adjustments.

Figure 2: A worker demonstrating the use of the CP7115 Needle Scaler on a large metal structure. This illustrates the tool's application in industrial settings for surface preparation.
Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your CP7115 needle scaler.
- Daily Oiling: Apply a few drops of pneumatic tool oil into the air inlet before and after each use. If using an inline lubricator, ensure it is properly filled.
- Needle Inspection and Replacement:
- Regularly inspect the needles for wear, bending, or breakage. Worn needles reduce efficiency.
- To replace needles, disconnect the air supply. Unscrew the front retainer (if applicable) or follow the specific instructions for your model to remove the old needle bundle. Insert the new 1/8 inch diameter needle bundle and secure it.
- Air Filter Maintenance: If using an inline air filter, regularly check and clean or replace the filter element to ensure clean air supply to the tool.
- Storage: Store the tool in a clean, dry environment when not in use.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Tool not operating or low power |
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| Excessive vibration |
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| Air leaking from tool body |
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Specifications
| Feature | Detail |
|---|---|
| Model Number | CP7115 |
| Brand | Chicago Pneumatic |
| Operation Mode | Pneumatic |
| Blows Per Minute (BPM) | 4,000 |
| Needle Diameter | 1/8 Inch |
| Stroke | 1.26 Inch (32 mm) |
| Bore Diameter | 0.55 Inch (14 mm) |
| Item Length | 11.42 Inches (290 mm) |
| Item Weight | 2.87 Pounds (1.3 kg) |
| Material | Metal |
| Sound Level | 110 dB |
| Maximum Air Pressure | 90 PSI (recommended) |
Warranty Information
The Chicago Pneumatic CP7115 Needle Scaler comes with a 1 Year Limited Warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
Extended protection plans may be available from your retailer. For specific terms and conditions of the warranty, please refer to the documentation provided with your purchase or contact Chicago Pneumatic customer support.
Support and Contact
For technical assistance, parts, or service inquiries, please visit the official Chicago Pneumatic website or contact their customer support department. You can also refer to the User Guide (PDF) for additional information.
Manufacturer: Chicago Pneumatic Tool Company
Brand Store: Chicago Pneumatic Store on Amazon





