As an Amazon Associate, Garage Welding may earn from qualifying purchases. This does not change the price you pay.
The Chicago Pneumatic CP7111 is a pistol-grip air hammer with a 0.401 inch round shank and a published rate of 3,000 blows per minute. It is a practical choice for welders and fabricators who need to chip slag, break rusted bolts, separate seized parts or cut sheet with a chisel, provided they have an air compressor that can keep up. It is a poor fit if you only have a small compressor.
CP7111 Air Hammer at a Glance
| Item | Published spec |
|---|---|
| Type | Pistol-grip pneumatic hammer |
| Shank | 0.401 in (round) |
| Blows per minute | 3,000 |
| Stroke | About 2.6 in (67 mm) |
| Air consumption | About 6.25 CFM average |
| Air inlet | 1/4 in thread (check NPT) |
| Weight | About 3.5 lb (1.6 kg) |
Specs come from retailer and manufacturer listings; confirm them for the exact kit you buy. The chisels shown in some listings are sold separately.
Check Current Price on Amazon →
What It Is and Who It Suits
An air hammer drives a chisel or punch back and forth very fast. With the right bit it can cut thin metal, shear off rusted bolts, chip welds, break spot welds and tap out bushings. It works best in a garage or small shop with a compressor.
The CP7111 is the lighter kind that body shops and maintenance people use for panel work and general-purpose chiseling. For welders it is a slag chipper and a way to remove stubborn old welds, rust and paint.
It suits hobby fabricators who already own a compressor and want stronger tools than a manual chipping hammer. It also suits restoration work, where cutting out rusted sections is common.
How to Check It Fits Your Setup
- Check the compressor. The tool uses compressed air continuously. Compare its CFM requirement with your compressor’s delivered CFM at your working pressure.
- Verify the hose and fittings. The inlet is 1/4 inch; you need a compatible quick coupler and a hose with adequate inside diameter.
- Match the accessories. Any chisel, panel cutter or punch must use a 0.401 inch round shank.
- Add an inline oiler or air tool oil. Most pneumatic tools need regular lubrication. Follow the manual for method and oil type.
- Confirm what is in the box. Kits and bare tools are listed under different model numbers, so check whether bits are included.
Pros and Limitations
Pros
- Fast removal of slag, scale and rust compared with hand chipping
- Standard 0.401 inch shank with a wide choice of bits
- Relatively light for a pneumatic hammer
- Multi-use for fabrication, body work and maintenance
Limitations
- Needs a compressor with enough CFM, which small units may not have
- Loud and vibrates, so hearing and hand protection are necessary
- Can distort thin sheet if used carelessly
- Accessories are usually sold separately
Using an Air Hammer Safely
- Wear safety glasses or a face shield, hearing protection and gloves.
- Use only chisels and bits with a retainer or spring designed for the tool; a loose bit can fly out.
- Never point the tool at yourself or another person, and disconnect the air line before changing the bit.
- Do not exceed the maximum air pressure in the manual.
- Let welds cool before chipping, and keep flammables away from sparks created by chisel work.
- Lubricate as directed and drain moisture from the compressor tank regularly.
Alternatives and Related Guides
- For manual slag removal, see the wire brush rust scrub tools.
- If you only need to hold parts for welding, consider the V-type magnetic welding clamps review.
- Cutting out old panels? Our Olympia 9 inch locking pliers review covers a useful holding tool for panel work.
Frequently Asked Questions
What air compressor do I need for the CP7111?
Published specs list an average air consumption of about 6.25 CFM, with a higher peak. Check the tool manual for working pressure, then choose a compressor that delivers that flow at your pressure, not just a tank rating. Small pancake compressors may struggle with sustained use.
What shank does the CP7111 use?
It uses a 0.401 inch round shank, which is a common air-hammer size. Chisels and punches must match that shank and have a retainer or spring that suits the tool. Check that any accessory lists 0.401 inch before you buy.
Can I use an air hammer to remove weld slag?
Yes, a chisel on an air hammer can chip heavy slag, spatter and scale faster than hand tools. Wear eye and hearing protection, let the weld cool, and avoid using it on thin sheet metal where it can dent or tear.
Is the CP7111 suitable for continuous heavy use?
It is a pistol-grip utility air hammer aimed at maintenance and body shop use. For daily production chiseling, a heavier model and a larger compressor might be more suitable. Check the manufacturer’s duty guidance in the manual.
Final Thoughts
The CP7111 is a straightforward pneumatic hammer for slag chipping, rust removal and light cutting jobs, as long as your compressor can supply the air. Check the CFM figures and the accessory shank size before you order.
View Current Listing on Amazon →
See Latest Price and Details →
