Air impact wrench are used to hold couplings or nuts, which can be used to loosen bolts and nuts in mechanical engineering. Unlike air impact wrenches with power cord or battery, there is no risk of flying sparks that could ignite the gases generated when working on vehicles.
The air impact wrench is standard equipment in many workshops. Suitable for professional tasks and routine craftsmen work on the vehicle and is a very sensible purchase.
The Best Professional Air Impact Wrenches
The sheer power and performance of 1, 295-Feet-pounds (ft-lb) of loosening torque and 1, 400 Blows Per Minute makes this the strongest hard hitting Twin Hammer. A lightweight all-black composite body with a patented ergonomic AIRCAT handle. AIRCATs patented tuned exhaust system gives this tool an extremely low decibel level of 86 dB, with no loss of power.
Silent Technology in AIRCAT Air Impact Wrench
Buyer’s guide for air impact wrenches
This review and guide provide information on some best air impact wrenches you can find.
There are quite a few manufacturers of air impact wrenches in the home improvement market today, and prices vary greatly depending on the model and design. From a pure price standpoint, there are air impact wrenches in models that can be had for just under $98 each. At the other end of the scale, however, there is an air impact wrenches that can cost interested hobbyists nearly $269.
The best air impact wrenches
All our reviews are based exclusively on expert judgments or practical experience with most of the air impact wrenches we have tested. We strive to make our guide as independent and as detailed as possible.
Reviews Air Impact Wrenches
Ingersoll Rand Drive Air Impact Wrench
Ingersoll Rand 1/2-Inch Drive Air Impact Wrench is built to tackle the toughest bolts. This powerful, durable impact wrench packs up to 1,350 foot-pounds of nut-busting torque into a compact and lightweight design. Weighing only 4.6 pounds, it allows you to work for longer stretches of time without fatigue. The four-position power regulator and one-handed forward/reverse push button give you the control and versatility needed to tackle a variety of automotive and industrial jobs. And thanks to its titanium hammer case and rugged composite housing, this impact wrench is tough enough to endure the harshest working environments-from garages to demanding industrial job sites.
Ingersoll Rand Heavy-Duty Air Impact Wrench
Impact Mechanism With Two Hammers
The exclusive twin-hammer impact mechanism delivers a maximum torque of 600 foot-pounds, while the adjustable power regulator lets you easily adjust power output to suit your task. Lightweight and easy to maintain, this impact wrench is a reliable choice for vehicle hobbyists and professional mechanics alike.
Campbell Hausfeld Air Impact Wrench with Composite Body and Comfort Grip
Powerful Air Impact Wrenches
1/2 inch impact wrench will help you power through the toughest jobs. Whether you are a weekend warrior or an auto enthusiast, you will appreciate the 400 ft. Lbs. This impact wrench boasts a heavy-duty twin-hammer impact mechanism for maximum torque, while the 3-speed forward/reverse power settings adjust to meet your specific project requirements. With a maximum torque of 750 ft. Lbs., BPM of 1,200 and RPM of 8,500, this impact wrench gets stuff done efficiently. Average air consumption of 3.4 CFM 90 PSI. Maximum pressure of 90 PSI. Minimum hose size of 3/8 inch. Air inlet size of ¼ inch NPT (F). An air compressor with a tank capacity of 8 gallons or larger is recommended.
What are the types of impact wrenches?
There are two types of impact wrenches the cordless impact wrench and the compressed air impact wrench. The difference between them lies in the motor drive.
The pneumatic impact wrench.
A powerful pneumatic wrench with a torque of more than 800 Nm allows you to easily tighten wheel nuts. Compact and easy to use, it requires an air compressor with an operating pressure of at least 6 bar and an airflow rate of over 150 l/min. There is usually a 1/4″ connection on the pneumatic screwdriver for a compressed air hose.
It has a simple torque adjustment. Many tests of pneumatic wrenches have shown that this type of pneumatic set is particularly suitable for screwing on cars. Here, relatively tight wheel nuts need to be loosened and tightened, so a high torque is required.
The advantage of an impact wrench with compressed air is that you can achieve much higher torque and thus tighten bolts more firmly and loosen bolts that have been tightened more firmly.
Electric impact wrench.
For electric screwdrivers, all you need is a 230-volt connection or a good battery. Allows you to tighten lug nuts faster than with a box wrench or open-end wrench.
Air screwdriver tests have shown that these models are more likely to be used in the home for hanging cabinets or building houses. This is not sufficient for automotive use (not all screws can be loosened with 350 Nm torque), so screws often have to be loosened by hand.
What should you look for when buying air impact wrenches?
Air impact wrenches aren’t just for the do-it-yourselfer, but if you plan on doing routine work with your car, buying one would make a lot of sense.
When buying should pay attention to the following:
- The power section.
The transition between the motor and the socket called the actuator. Models with a 1/2- or 1/4-inch square shank are common. 3/8- and 3/4-inch drives are less common.
High-end truck impact wrenches usually have a 3/4-inch connection so larger sockets can be used.
- Air pressure and air requirements.
The compressor for the air impact wrenches must have enough power to keep the bolt running. A standard 1/4-inch quick disconnect coupling is usually available to connect the compressor. This means that the devices can easily be supplied with an operating pressure of 6 bar and can take at least 150 liters of air per minute.
You should pay special attention to the performance features of cheap air impact wrenches, as they usually require more air than quality models.
- Maximum torque.
Torque plays a special role in an air impact wrench. Impact wrenches have torques ranging from 300-400 Nm to 1000 Nm. Some tests on an impact wrench have shown that these values are indeed necessary to loosen all bolts or lug nuts. Weaker an impact wrench usually cannot loosen all bolts, so you will have to resort to manual operation.
- Idle speed.
Idle speed indicates how fast the bolts are turning. The more revolutions per minute an air impact wrench set has, the faster you can change the tire or at least loosen the lug nuts. However, compared to an impact wrench and compressed air, the idle speed is only between 7,000 and 7,500rpm. But that makes the job much faster than with an electric impact wrench, which manages less than 4,000rpm.
Weight is always a matter of controllability. The lighter an air impact wrench is, the easier it is to use on a sustained basis. Therefore, a good air impact wrench should weigh no more than 6 lb and have as little vibration as possible. Then, if the impact wrench has an ergonomic handle, almost everything is perfect.
- Pneumatic accessories.
Air impact wrench usually has accessories as well and can come with tool cases to hold them.
Air Impact Wrenches Price:
- Campbell Hausfeld Air Impact Wrench with Composite Body and Comfort Grip
- Ingersoll Rand Heavy-Duty Air Impact Wrench
- AIRCAT 1/2-Inch Impact Wrench
- Ingersoll Rand Drive Air Impact Wrench
How does air impact wrench work?
An air impact wrench or pneumatic impact wrench is a pneumatic tool designed for removing and tightening bolts and nuts at high speed. Air impact wrenches differ from other types of mechanical wrenches in that they can transmit torque with instantaneous jerking motions rather than a constant force.
They are connected to an air compressor and can add more power to the device.
Pneumatic impact wrenches work by applying rotational energy or torque to amass and firing it in short bursts. The rotational energy or torque is transmitted by high-pressure air.
The pneumatic wrench requires a constant supply of air, which comes from an adapter and is directed through an orifice. This air comes into contact with a rotor, which consists of several uniform blades. The counter-air causes the rotor to rotate, generating rotational energy. Likewise, the rotor cylinder has another part, called the slot, which connects it to the hammer.
The slot allows the hammer to move with the rotor cylinder and maintains rotational energy. When the trigger is pulled, the other part, called the handle, moves the hammer back and forth. And the mass accelerates to tighten or loosen a nut or bolt.
Conclusion about the air impact wrenches
When buying air impact wrenches, pay attention to the maximum torque provided for loosening bolts. You should have at least 300 Nm available for loosening wheel nuts. If it is more than 800 Nm, an air impact wrench can really loosen any bolt.
Even when buying cheap models, you should pay attention to the performance data in terms of working pressure and airflow rate. The compressor should provide the required amount of air at a pressure of 6.3 bar.
Most compressors from the hardware store can do this without any problems. In particular, inexpensive air impact wrenches sometimes require a large amount of air that smaller compressors cannot supply.
FAQ- Air Impact Wrenches
For the reliable operation of your air impact wrench, you need to lubricate it regularly. There are special compressed air oils from various manufacturers for this purpose. However, the composition is basically the same. If you still have sewing machine oil in your cabinet, you can also use this air tool oil.
In pneumatic technology, a compressor plays an important role. Since there is no complete compressor on the air impact wrench, you usually need to buy a compressor by yourself. You need to ensure a maximum working pressure of at least 6 bar and an airflow rate of 52 GPM. However, it also depends on the power of the air impact wrenches.
Not all models in the air impact wrench comparison are torque adjustable. Torque-adjustable air impact wrenches can be customized to fit the home or garden project at hand. In addition, a torque wrench can be replaced if the torque is adjustable. Regardless of whether it is a 1-inch or smaller model of air impact wrench: the adjustment is usually made by a small knob on the device that reduces the pressure.
The amount of compressed air required depends on the air impact wrenches you purchase. Some models of air impact wrenches require as little as 29US-gallons to 31US-gallons per minute, and incandescent models usually require less. However, there are inexpensive air impact wrenches whose motors only work well at 39US-gallons to 60US-gallons per minute. These are usually pretty inefficient air motors, so we recommend buying high-quality air impact wrenches as they don’t bring as much frustration.