10 Powerful Air Impact Wrench Reviews – The Best Choice for 2018

DEWALT DWMT70773LThe best thing about owning your own garage is taking care of repairs yourself.

Who needs to pay someone else for work that you can do yourself?

Corroded lug nuts that haven’t been moved for years can be nearly impossible to budge by hand, which is not to mention bolts that are tucked away in spaces too tight to fit a breaker bar. Air impact wrenches are the tools with the power for that job, but there are so many to choose from.

How can a DIY mechanic choose the best air impact wrench for the job?

We asked ourselves that question, and that’s why we’ve rounded them up and reviewed the cream of the crop this year.

We weeded out the 10 wrenches that are the leaders in the market today and then narrowed them down to the best overall impact wrench in our final verdict. Along the way, we’ve laid out our research on what makes an air impact wrench a good choice and what doesn’t.

Let’s look at some of the better air impact wrenches that are available this year.

Product NameImageMax TorqueOverall RatingDetails
Ingersoll Rand 2235QTiMAX Quiet Titanium 1/2-Inch Air Impact Wrench 1,300 ft-lb 10 Check price
AirCat 1150 Killer Torque 1/2-Inch Impact Wrench 1295 ft-lb 9.5 Check price
Ingersoll Rand 231C Super-Duty 1/2-Inch Air Impact Wrench 600 ft-lb 9.5 Check price
NitroCat 1200-K Kevlar Composite 1/2-Inch Air Impact Wrench 1,295 ft-lb 9 Check price
Ingersoll-Rand 2130 Heavy-Duty 1/2-Inch Air Impact Wrench 550 ft-lb 9 Check price
DeWalt DWMT70773L Heavy-Duty 1/2-Inch Air Impact Wrench 750 ft-lb 9.5 Check price
Ingersoll Rand 2317G Edge Series 3/8-inch Air Impactool and Ratchet Kit 500 ft-lb 8.5 Check price
AirCat 1000-TH Composite 1/2-Inch Air Impact Wrench 1,000 ft-lb 9 Check price
BOSTITCH BTMT72391 1/2-Inch Impact Wrench 500 ft-lb 8 Check price
ACDelco ANI405 1/2-inch Air Impact Wrench 500 ft-lb 8 Check price

Ingersoll Rand 2235QTiMAX Quiet Titanium 1/2-Inch Air Impact Wrench

Ingersoll Rand Drive Air Impact Wrench

Ingersoll Rand 2235QTiMAX is an air impact wrench that takes the max torque that you can get from a 1/2-inch drive and puts it into a titanium case.

Now that’s style! The result is a reliable air impact wrench that can loosen the old, frozen bolts you find on old cars and machinery. It hits the bolts with 1,300 ft-lb of torque over 1,200 times a minute. That’s about the best we’ve seen among the 1/2-inch air impact wrenches we reviewed.

But how does it stack up against the other impact wrenches in its class?

It does pretty well. Its lightweight construction means you can work continuously without fatigue. It’s not quite as successful at tamping down the noise as other high-performance air impact wrenches, but it is quieter than the average air tool. The only real downside we found was the price tag.

Features:

  • 1,300 ft-lb of loosening torque
  • 1,220 impacts per minute
  • Four-position power regulator
  • Rugged titanium hammer case
  • Weighs 4.6 lbs.
  • Noise level rated at 91.9 dB
  • Parts warranty length varies depending on the dealer

Conclusion

You’ll pay for the quality of Ingersoll Rand’s 2235QTiMax, but if you’re looking for a reliable hard-hitter in the 1/2-inch category, this could be the one for you. You’ll need an air compressor that can handle its air flow needs to get the most out of the 2235QTiMax, but that’s the case with any high-powered air impact wrench.

What wouldn’t we recommend this air impact wrench for?

The typical home garage doesn’t need a heavy-duty air impact wrench unless you work on old cars on a regular basis. The expense doesn’t justify itself for routine impact wrench work when there are less expensive choices that will do the job just as well as this one does.[/wpsm_box]

PROS:
  • Hard hitter that can handle stubborn bolts
  • Lightweight
  • Titanium housing makes it extra durable

CONS:
  • Could be quieter
  • Expensive compared to equivalent impact wrenches

Ingersoll Rand 2235 TiMax Impactool

Video about Ingersoll Rand 2235 TiMax Impactool

Manual

Ingersoll Rand 2235QTiMAX User Manual

Ingersoll Rand 2235QTiMAX User Manual

Intended use: This Air Impact Wrench is designed to remove and install threaded fasteners.

 

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AirCat 1150 Killer Torque 1/2-Inch Impact Wrench

AIRCAT 1150

So, you need to break loose a rusty old bolt that’s stuck?

Chances are AirCat’s 1150 Killer Torque can do the job. This air impact wrench delivers the maximum torque that 1/2-inch impact wrenches can handle without breaking their anvils. Nearly 1,300 ft-lb of loosening torque and 1,400 impacts per minute will knock that bolt loose.

What’s more to like about it?

The 1150 Killer Torque is also easy to use for hours during a workday. It’s lightweight, weighing in at a little over 4.5 lbs., and its muffler keeps the noise down around 86 decibels. Maintenance of this wrench is easy, too. Just add a few drops of air tool oil after each use to keep the moisture under control. That’s it!

Features:

  • 1295 ft-lb of loosening torque
  • 1400 impacts per minute
  • Twin hammer design
  • Weighs 4.63 lbs.
  • Quiet design keeps the noise at 86 dB
  • 2-year parts and labor warranty

Conclusion

This impact wrench is a contender for the top spot in our review. For a reasonable price, you get a lightweight air impact wrench with plenty of loosening torque to break loose those stubborn lug nuts.

It also has a good no-load speed for quick tire rotations. It’s even designed to protect your hearing with a muffler that keeps the noise down. The 2-year warranty covers both parts and labor.

So, what’s not to love about it?

Like all high-powered air impact wrenches, the 1150 Killer Torque’s power comes from your air compressor. This air tool needs twice the air flow that’s used by light-duty air impact wrenches designed for the home user. That means that it won’t operate up to its full potential if your compressor isn’t up to the task.

PROS:
  • Great high torque power for loosening bolts
  • Lightweight
  • Muffler keeps the noise level down

CONS:
  • Uses twice as much air as less powerful air tools

10 Powerful Air Impact Wrench Reviews – The Best Choice for 2018

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Manual

AIRCAT 1150 Killer Torque User Manual

AIRCAT 1150 Killer Torque User Manual

Feel free to consult the manual before use.

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Ingersoll Rand 231C Super-Duty 1/2-Inch Air Impact Wrench

Ingersoll-Rand 231C 1/2-Inch

Are you looking for the fastest bolt-shooting air impact wrench available?

Ingersoll Rand’s 231C Super-Duty is in the running for that title with 8000 RPMs of speed when it isn’t loaded. You’ll get your car’s lug nuts off and on in a snap. This 1/2-inch air impact wrench has a bit more power than others in the light-duty class, so you can deal with overtightened lug nuts without the hassle of using a breaker bar.

The 231C Super-Duty is popular for a couple of reasons:

First, it comes at a reasonable price for a well-designed air tool that’s reliable and can handle 90% of the work you’ll encounter. Those hard to break bolts are the exception, and we’ve got breaker bars for a reason. Sometimes, a job requires better leverage and a little elbow grease.

The other reason?

This air impact wrench is fast and doesn’t need to hog your air compressor full-time to deliver that speed. That makes it great for the home mechanic.

Features:

  • 600 ft-lb of max torque
  • 8000 RPM no load speed
  • Weighs 6.7 lbs.
  • Exclusive twin hammer plus design
  • Adjustable power regulator
  • 1-year parts warranty

Conclusion

Ingersoll Rand’s 231C Super-Duty is a good air impact wrench for its price, but it isn’t a powerhouse that’s going to break loose every problem lug nut you encounter. Still, it’s a fast air impact wrench that’ll make changing tires a snap. It won’t tax your air compressor either, which is a plus when working in a home garage.

This is also one of the heaviest impact wrenches we’ve reviewed. It’s fine for occasional use, but it might get tiresome if you have to hold it up all day long.

PROS:
  • One of the fastest no-load speeds
  • Enough torque for light-duty work
  • Won’t strain your air compressor

CONS:
  • Not a good option for loosening old bolts
  • A bit on the heavy side at close to 7 lbs.

Ingersol-Rand 231 Impact Wrench Unboxing and First Use

Video about Ingersol-Rand 231 Impact Wrench Unboxing and First Use

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NitroCat 1200-K Kevlar Composite 1/2-Inch Air Impact Wrench

NitroCat 1200-K

Ever heard of a hard-hitting impact wrench with a Kevlar housing?

Let us introduce you to NitroCat’s 1200-K. This 1/2-inch air impact wrench packs as much loosening torque as this size air tool can provide. It’ll take care of those difficult lug nuts and rusted bolts if you work on old cars all the time, and what a relief it is to put away that breaker bar.

This is also a lightweight air impact wrench, weighing in at 4.5 lbs. As far we can tell, the Kevlar-composite housing is unique to this product, and it certainly allows the NitroCat to take a beating without noticing it.

But there’s more:

It’s the little things that make this air impact wrench a great buy, such as the 2-year parts and labor warranty, which is a better deal than what’s offered by most toolmakers. It’s also designed to run quietly with a muffler design that minimizes the noise air impact wrenches are well-known for.

Features:

  • 1,295 ft-lb of loosening torque
  • 950 impacts per minute
  • Hard-hitting twin clutch mechanism
  • Less noisy at 86 dB
  • Durable Kevlar-composite housing
  • Weighs 4.5 lbs.
  • 2-year parts and labor warranty

Conclusion

NitroCat’s 1200-K is a solid competitor among the heavy-duty 1/2-inch air impact wrenches. It’s lightweight and quiet, making it an easier impact wrench to use throughout the day.

We’d also say that using Kevlar to make the housing is a unique way to improve the wrench’s durability. If you’re looking for an air impact wrench you can trust to deal with working on ancient equipment or vintage cars, the 1200-K is as good as any.

But you may be wondering about the NitroCat 1200-K’s downsides:

Like most high-torque air impact wrenches, it needs twice as much air flow than a light-duty air tool. It’ll suck down 8 CFM, which may be more than a small air compressor in a home garage can keep up with. You’ll miss out on the NitroCat’s full power without a bigger compressor.

PROS:
  • Hard-hitting impact wrench
  • Fancy Kevlar housing can take a beating
  • Quieter than other competing air tools
  • Lightweight

CONS:
  • Will strain a small air compressor
  • Not the cheapest impact wrench available

Manual

NitroCat 1200-K User Manual

NitroCat 1200-K User Manual

Please consult this manual before use.

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Ingersoll-Rand 2130 Heavy-Duty 1/2-Inch Air Impact Wrench

Ingersoll-Rand 2130

Do you need a basic, lightweight air impact wrench to do simple jobs like rotating tires at home?

Ingersoll Rand’s 2130 has the bases covered as a light-duty impact wrench for the home DIYer. At a little better than 500 ft-lb of max torque, it’ll take care of easy work without a problem. It has multi-position power management, so you control how much torque you use when tightening bolts down, and its lightweight construction means you won’t get tired of carrying it around all day.

Here’s the thing:

There’s no doubt this air impact wrench will be an upgrade for a home mechanic who’s been making do with a breaker bar for those difficult bolts, but it would be a better deal as a starter impact wrench if its price matched its performance. It’s reliable enough that the 1-year warranty is nothing special. It’s not likely to break during the first couple years.

Features:

  • 550 ft-lb of max torque
  • Full-stroke tease throttle
  • Lightweight aluminum hammer case
  • Multi-position power management
  • Weighs 4.2 lbs.
  • 1-year parts warranty

Conclusion

While the performance of Ingersoll Rand’s 2130 is fine for what it attempts to be, the price is higher than many competitors in its class. It’s hard to recommend it over the other less expensive 1/2-inch air impact wrenches that we’ve reviewed. Besides that, it’s a reality that home mechanics often encounter bolts that a light-duty impact wrench won’t budge.

Why not move up to a higher-torque air impact wrench if you have the budget to buy this one?

There’s no reason that we can see, other than perhaps you’re stuck with a small air compressor or like the Ingersoll Rand brand.

PROS:
  • Lightweight aluminum case
  • Adequate power for light-duty work like changing tires

CONS:
  • Pricey for the light-duty performance

Ingersoll Rand 2130 1/2 Inch Air Impact Wrench Gun Review

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Manual

Ingersoll Rand 2130 User Manual

Ingersoll Rand 2130 User Manual

Please consult the manual before use.

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DeWalt DWMT70773L Heavy-Duty 1/2-Inch Air Impact Wrench

DEWALT DWMT70773L

Another air impact wrench with so-so max torque that won’t handle frozen or overtightened bolts, but it does have plenty of power for everyday use, such as changing tires.

What does DeWalt’s DWMT70773L have to offer that we didn’t find with the others?

For starters, its max torque is not bad for this class of low-power air impact wrenches. 750 ft-lb at 1,100 impacts per minute is nothing to sneeze at. That’s enough to handle overtightened lug nuts but don’t try to use it to dismantle a 20-year-old tractor. It doesn’t weigh as much as some of its competitors either (little more than 5 lbs). The 3-year warranty is better than most, too.

So, what are the downsides?

You’ll need a compressor that can handle 5 CFM for this impact wrench, which is a bit more than others, but that’s to be expected with the higher torque rating. The power has to come from somewhere, and for air, impact wrenches that somewhere is the air compressor.

The price is nothing impressive either. You can get a more powerful impact wrench for a bit more and a less powerful one for quite a bit less.

Features:

  • Max torque of 750 ft-lb
  • No load speed 7500 RPM
  • 1100 impacts per minute
  • Twin hammer mechanism
  • Adjustable power regulator
  • Weighs 5.3 lbs.
  • 3-year limited warranty

Conclusion

If you’re on a budget or have a small air compressor, DeWalt’s DWMT70773L could be a good choice for you given that it outperforms many other light-duty air impact wrenches. It can handle normal home garage use fine, and it has enough torque to deal with the occasional overtightened lug nut.

By the same logic, though, there’s plenty of other choices that would make sense if you can spend a bit more and have an air compressor that’ll handle a heavy-duty air impact wrench.

One thing this air impact wrench has going for it is that DeWalt stands behind it for a full 3 years. You don’t see that good of a warranty with many toolmakers these days.

PROS:
  • Better max torque rating than similar air impact wrenches
  • DeWalt’s 3-year warranty

CONS:
  • Price isn’t impressive for the performance

DEWALT Air Tools

Video about DEWALT Air Tools

Manual

DEWALT DWMT70773L User Manual

DEWALT DWMT70773L User Manual

Read and understand this instruction manual and tool labels before installing, operating or servicing this tool. Keep these instructions in a safe accessible place.

 

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Ingersoll Rand 2317G Edge Series 3/8-inch Air Impactool and Ratchet Kit

Ingersoll Rand 2317G

Are you a first-time buyer looking for a handy air impact wrench kit?

You need to look no further because Ingersoll Rand is thinking of you with the 2317G Edge Impactool and Ratchet Kit. There’s more included than just a basic air impact wrench. You also get an air ratchet and matching socket set. It’s great for light-duty work in the home garage, such as DIY work on newer cars or small engines.

The kit comes with a 231G Impactool, which is a 3/8-inch air impact wrench. It can muster 500 ft-lb of torque without straining your air compressor. You also get the 170G air ratchet that can help you with normal bolts in tight spaces. The ratchet delivers only 55 ft-lb of torque and 170 RPM of no-load speed, so it’s really just a power ratchet.

But there’s more:

You also get a 5-piece set of high-quality standard sockets that fit both the impact wrench and the ratchet. All of this is neatly organized with a handy carrying case.

Features:

  • Impact wrench has 500 ft-lb of max torque
  • Air ratchet has 170 RPM no load speed
  • Kit Includes matching socket set and carrying case
  • Heat-treated ratchet heads
  • Impact wrench weighs 5.8 lbs.
  • 1-year limited warranty

Conclusion

This is a great deal for home mechanics who aren’t rebuilding ancient machinery full of corroded bolts that haven’t been moved for decades. An air ratchet is a good tool for getting into narrow spaces and saves you the aggravation of manually removing and installing those hard-to-reach bolts.

What’s the catch?

This is a pricey set of tools that are only good for light-duty jobs. If you’re going to need more torque to loosen corroded bolts, this toolkit isn’t going to handle those situations. You’re better off taking the same money and spending it on a high-performance air impact wrench.

PROS:
  • More than just an impact wrench with an air ratchet and socket set
  • Decent torque for the impact wrench’s size
  • Great for entry-level impact wrench buyers

CONS:
  • Won’t be able to handle any heavy-duty work
  • You could get a more powerful Impact wrench for the same price

IR 231G Refuses to Die! 4 Year Review of the ABSOLUTE BEST Air Impact

Video about IR 231G Refuses to Die! 4 Year Review of the ABSOLUTE BEST Air Impact

Manual

Air Impact Wrench 231G User Manual

Air Impact Wrench 231G User Manual

Intended Use: This Air Impact Wrench is designed to remove and install threaded fasteners.

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AirCat 1000-TH Composite 1/2-Inch Air Impact Wrench

AIRCAT 1000-TH

Do you need an impact wrench with better loosening torque but that won’t overtake your air compressor?

AirCat’s 1000-TH is the impact wrench you’ve been looking for. It’s designed for optimal performance without asking you to have a professional-grade air compressor. With a 1000 ft-lb of loosening torque at 1,300 impacts per minute, it can make short work of any overtightened bolt. Its sustained torque is also above average at 800 ft-lb.

But there’s more:

It’s equipped with the same muffler design as the more expensive AirCat we’ve reviewed, and it’s a lightweight air tool at 4.5 lbs. You really can’t go wrong with this air impact wrench if you don’t need the top hitting power found with other heavy-duty 1/2-inch air impact wrenches.

Features:

  • 1,000 ft-lb loosening torque
  • 800 ft-lb sustained torque
  • 1,300 impacts per minute
  • “Super clutch” twin hammer mechanism
  • Patented quiet technology keeps noise to 86 dB
  • Extended 2” anvil available
  • Lightweight at 4.5 lbs.

Conclusion

AirCat’s 1000-TH is a great value for what you get:

An above average air impact wrench that’s well suited for the home mechanic with a smaller air compressor. It’s a happy medium between light-duty and high-performance air impact wrenches, occupying a sweet spot that isn’t crowded with competitors.

But here’s the catch:

If you’ve got the air compressor for a better air impact wrench, why not pay a little extra for more power?

That’s the rub with this impact wrench. Most home mechanics who need the extra hitting power to work on old cars could probably do better buying a heavy-duty air impact wrench.

PROS:
  • Better loosening torque that the average 1/2-inch impact wrench
  • Good sustained torque for its size
  • Lower noise level than the standard air tool
  • Lightweight

CONS:
  • There are harder hitters on the market for a little more investment

Manual

AirCat 1000-TH User Manual

AirCat 1000-TH User Manual

Read carefully before operating this tool.

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BOSTITCH BTMT72391 1/2-Inch Impact Wrench

BOSTITCH BTMT72391

Sometimes you really don’t need all that extra torque muscle, especially if all you plan to do with an air impact wrench is rotate your tires faster. 500 ft-lb is enough to break loose normal lug nuts. Bostitch’s BTMT72391 is a 1/2-inch air impact wrench that can do the easy work faster than you will with a tire iron.

So, what’s special about it?

The price is certainly more reasonable than what you pay for the heavy-duty air impact wrenches, and Bostitch gives you a full 3 years of warranty, which is more than most manufacturers. It can also work as a cordless impact wrench using a nickel-hydride battery. That can come in handy when you’d like to step away from your air compressor for a quick job.

Features:

  • 500 ft-lb of max torque
  • Assisted by a Nickel-metal hydride battery
  • Adjustable 3-speed power regulator
  • Weighs 5.9 lbs.
  • 3-year Bostitch limited warranty

Conclusion

Bostitch’s BTMT72391 isn’t a bad buy for the home garage tool set. It’ll get your tires off and on in a jiffy. Just don’t go and try to remove that strut bolt under your car that’s been there for 20-plus years.

This air impact wrench isn’t the right tool for that job. Still, if you use it sparingly when there are lots of well-oiled bolts to shoot, this’ll be a step up from using a tire iron.

PROS:
  • Plenty of torque for ordinary jobs like rotating tires
  • Can work as a battery-powered impact wrench
  • 3-year warranty

CONS:
  • Don’t try to take off that 20-year-old bolt under your car
  • Hefty weight at nearly 6 lbs.

Manual

BOSTITCH BTMT72391 User Manual

BOSTITCH BTMT72391 User Manual

BEFORE OPERATING THIS TOOL, ALL OPERATORS SHOULD STUDY THIS MANUAL TO UNDERSTAND AND FOLLOW THE SAFETY WARNINGS AND INSTRUCTIONS

 

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ACDelco ANI405 1/2-inch Air Impact Wrench

ACDelco ANI405

Are you looking for a good air impact wrench on a budget?

Then the ACDelco ANI405 is not a bad choice at all. It isn’t going to break loose tough bolts that haven’t moved in years, and some overtightened lug nuts may give it problems, but for anything else, the ANI405 will shoot bolts fast.

It comes with low, medium, and high torque settings in addition to reverse, so you can set it for the power you need to use for the job. It also boasts a handle exhaust design to keep flying debris away from your face.

Have you got the muscles to lift this beast?

We hope so because it isn’t a contender for the lightest air impact wrench on our docket, weighing in at close to 6 lbs. That makes it a steady tool, though, when it’s running. It’s also a loud impact wrench, dialing in at 97.5 decibels.

Features:

  • 500 ft-lb of torque
  • Hard-hitting twin hammer mechanism
  • Works as a cordless tool with alkaline battery
  • Lightweight aluminum housing
  • 7,000 RPM no load speed
  • Weighs 5.7 lbs.
  • 1-year limited warranty

Conclusion

ACDelco’s ANI405 is solid and reliable 1/2-inch air impact wrench for the price, even if it isn’t going to be the one you tell stories about breaking loose that impossible lug nut. It’ll get normal jobs like rotating tires done fast. Its twin hammer design makes short work of bolts and lug nuts that get removed on a regular basis, running at 7,000 RPM when it isn’t loosening and tightening.

But what about stuck bolts, you ask?

This isn’t a heavy-duty air impact wrench. If you work on old equipment or repair seldom-serviced parts with bolts that haven’t been removed for years, you’ll want a more powerful item than this to break the tough cases loose. The ANI405, though, is a fine impact wrench to do the simple stuff.

 Why wear out your overpowered impact wrench with work you don’t need that much torque to do?

PROS:
  • Handle exhaust improves safety
  • Low CFM consumption is easy on your air compressor
  • Alternate battery power mode

CONS:
  • Doesn’t have high torque for loosening stuck bolts

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Types of Air Impact Wrenches

Air impact wrenches are fairly standard in form and function, being designed for a very specific purpose.

What you will find is that air impact wrenches are divided into classes based on the size of their anvil, which is the spinning square bar that holds a socket on its end. This is because the amount of torque that an air impact wrench can deliver is limited by how much the anvil can handle without breaking.

  • Kits

Air impact wrench kits is a category to watch for if you're new to air impact wrenches. Kits often include a set of sockets and an air ratchet along with a small impact wrench in the Mini or 3/8-inch size.

  • Mini

Mini air impact wrenches come with anvils of various sizes, often 1/2-inch. They are designed with miniature housings to fit into tight spaces.

  • 3/8 inch

Air impact wrenches for lug nuts are often this size because there's typically no need for more torque. They often come in butterfly or pistol grip styles.

  • 1/2 inch

This is becoming the standard size for home use because it's large enough to deliver the heavy-duty power that a home mechanic is likely to need.

  • 3/4 inch

3/4-inch air impact wrenches are intended for heavy industrial or farm equipment use. These impact wrenches can handle larger bolts and deliver enough power to break them loose.

  • 1 inch

1-inch impact wrenches are becoming less common as 3/4-inch impact wrenches have improved their performance. You will find them used for heavy equipment repair and assembly.

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How We Chose the Best Air Impact Wrench   

Maintenance at home or on the farm is a challenge without the right tools when you need to do some heavy-duty work on old cars or farm equipment. Check also the other tools we've reviewed that will help homeowners:  backpack leaf blowers, professional chainsaws. 

We rounded up 10 air impact wrenches that are on the market today, casting a wide net to save you the time you’d spend hunting for the best impact wrenches yourself.

We put each air impact wrench through its paces. We found the hardest, most rusted lug nuts we could use to test which impact wrenches had the most power in the real world and not just on paper. We also tested each impact wrench over an extended period to find their breaking point.

What else did we factor in?

After the power and longevity tests, we took stock of all the other features that make using an air impact wrench more or less convenient for the hard-working mechanic. When we added it all up, we made a list of the top 10 and put them head to head.

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Main Features

  • Torque

This is the amount of force the wrench can apply to a bolt when turning it. Generally speaking, the drive size of the wrench dictates how much torque it can deliver, which is limited by the air flow your compressor can provide. The rest is determined by the design of the wrench.

  • Impacts per Minute

Impact wrenches are able to break bolts loose fast because they use a mechanism that hits the bolt rapidly rather than applying constant torque. This jolts the bolt and knocks it loose. The impacts per minute spec for an impact wrench gives you an idea of how quickly it can do that compared to the next impact wrench.

  • No Load Speed

This is how fast the impact wrench will turn when there’s no resistance from the bolt. It dictates how fast you can screw and unscrew bolts when you aren’t breaking them lose.

  • Single or Twin Hammer

The hammer is the mechanism that hits the wrench’s anvil and jolts the bolt that you’re working on. The best impact wrenches today boast a twin hammer design that hits the anvil in two places instead of just one, increasing the force of each impact.

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Noise

Air impact wrenches have always had the drawback of being loud. Most of the noise comes from the high-pressure air flowing through the wrench.

Newer impact wrenches have begun to address this to keep their noise level under the decibels that can damage your hearing. Innovative ways to silence the air flow have yielded safer, OSHA-compliant tools for the workplace.

How do they make quieter impact wrenches?

It’s all about how they route the air as it leaves the wrench. Some eject the air out the bottom of the wrench’s handle, which has the added benefit of protecting your face from flying debris. There are also mufflers that have been added to air impact wrench designs that quiet them significantly.

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Portability

This is probably the second most important feature of any impact wrench beyond its ability to break stuck bolts loose. You often find yourself in tight spaces when working on cars or other heavy machinery that doesn’t allow you to use a breaker bar. That’s where an impact wrench can be a lifesaver. If it can fit into the tight space, that is.

How do air impact wrenches stack up on the portability scale?

The air hose can be the biggest source of difficulty with air impact wrenches. Beyond that, though, the width and length of the wrench are going to dictate how small of the space it can fit into. We considered this factor carefully and thought about the day-to-day use of the wrench you would expect when choosing the one that’s best for you.

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Weight

The weight of an impact wrench will determine how tiresome it is to use for extended periods of time. It also has some effect on how much force the user has to apply to keep it steady when breaking a bolt loose. We thought about the typical uses you might have planned for the impact wrench and how long you would expect to carry it around during the day.

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Maintenance

Air impact wrenches are light on maintenance. Most recommend adding a couple drops of special air tool oil to the wrench’s air inlet every day to keep the moving parts lubricated between uses.

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How to Use an Air Impact Wrench

Air impact wrenches are straightforward tools designed to save time when removing and installing bolts and lug nuts. Because they use compressed air as their power source, you’ll need an air compressor that can provide at least 90 PSI of pressure. You’ll also want to have an air hose that’s long enough to move around your work area without too much trouble.

What other tips can we give you?

  • Always wear protective goggles to prevent eye injuries. The compressed air often blows up towards your face as it exits the impact wrench. Any debris that it carries could cause serious injuries.
  • Thread bolts by hand. You’ll avoid the trouble of a bolt jamming or stripping if you get it started before torquing it with the impact wrench.
  • Don’t over torque bolts. It’s easy to strip them out or break them when too much force is used.
  • Only use sockets designed for the impact wrench.
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Electric vs Air Impact Wrenches

Electric impact wrenches typically provide a bit less power than an air impact wrench, though they make up for this by being more convenient. There’s no need to have an air compressor to use an electric wrench, so it’s more popular for use at home.

An electric impact wrench still has the awkwardness of a cord to manage when moving around a workspace, but it’s less bulky and more flexible than the air hose that trails behind an air impact wrench to its compressor.

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Air vs Cordless Impact Wrenches

Cordless impact wrenches are the most recent development in impact wrench technology. They use rechargeable high-voltage batteries to deliver power approaching that of corded impact wrenches.

As the technology continues to improve, their power output is getting closer to being equal to corded electric impact wrenches.

The convenience of cordless wrenches makes them great for working away from a power outlet, such as in a driveway or on the road, and who wouldn’t like to be rid of cords in tight spaces?

But here’s the drawback with cordless impact wrenches: They use so much energy that you’ll need to swap and recharge the batteries often. If you intend to use them for an extended time, plan on having several charged batteries to swap out as well as the LiPo charger. This is why cordless impact wrenches are only practical for loosening a bolt or two during a job. A bigger job like rotating tires on a car will drain the batteries fast.

 

Air Impacts - VS - Cordless Impacts (Pneumatic - VS - Battery Powered)

Video about Air Impacts - VS - Cordless Impacts (Pneumatic - VS - Battery Powered)

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Warranty

Every air impact wrench will come with a warranty that covers damage to the wrench that happens during normal use. This is a valuable insurance policy that will save you the cost of repairing or replacing the wrench if it does fail.

Remember, though, that the damage can’t be the result of accidents or negligence on your part for the warranty to cover the cost. How long a manufacturer covers these costs is a factor to consider when buying any tool that’s going to break with use.
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FAQ

What type of air compressor is needed?

For a single air impact wrench, your air compressor should provide a minimum of 6.5-7 CFM at 90 PSI for the average 1/2-inch impact wrench that needs 5 CFM. If you plan to run more than one impact wrench simultaneously, then you’ll need to add together the CFM each of them needs. Your compressor should be able to deliver more than the sum of them to run them all at their maximum power settings.

What is PSI and CFM?

PSI stands from pounds per square inch and measures the amount of air compressed into a given space. PSI is a measure of stored air, not continuous air flow. CFM stands for cubic feet per minute. This measures the amount of air is flowing at a given moment. CFM is what determines how much power an air impact wrench will have at its disposal. PSI determines how long your air compressor can deliver that CFM before it needs to recharge.

What tasks are air impact wrenches designed for?

Air impact wrenches are designed to deliver high torque output as fast as possible. They are ideal for any job that involves removing and reinstalling many lug nuts, such as changing tires on a car. They are also great for removing stuck bolts that haven’t been moved for years in tight spaces. It saves the mechanic the exhaustion of using a breaker bar all the time.

How much torque is needed to remove and install lug nuts?

A lug nut that isn’t stuck can require 100 ft-lb of torque to move. Air impact wrenches deliver much higher amounts of torque to deal with difficult jobs and for speed. Remember that it’s best to apply only the amount of torque recommended by manufacturers when installing bolts. Stop torquing the bolt before it is tight and use a torque wrench to tighten it to its specification.

 

9.5 Total Score
The Final Verdict

To be honest, any of these 10 wrenches that we’ve reviewed could be the best air impact wrench. What sets each of them apart from the pack could be a pro or a con depending on what your needs happen to be. That said, though, we’ve tried to take an objective point of view to choose the most well-rounded air impact wrench of the bunch.

So, which did we choose?

The winner of our review workshop was the Ingersoll Rand 2235QTiMAX, and its Amazon customers agree in their reviews. It edges out the competition and proves the adage that you get what you pay for. Sure, the 2235QTiMAX is higher priced compared to the other air impact wrenches we’ve reviewed, but that’s to be expected for a titanium-built tool.

What really sold us on Ingersoll Rand’s 2235QTiMAX?

It was the fact that it delivers on all the key points that makes an air impact wrench in the 1/2-inch size class a high-performance tool. It reaches a loosening torque of 1,300 ft-lb at 1,200 impacts per minute and delivers 900 ft-lb of reverse torque. That’s as much power as you can get from this size tool.

With a titanium case, it’s light in your hand, and it isn’t the noisiest impact wrench you’ll find on the market. On top of that, the 2235QTiMAX is reliable and backed by a 2-year warranty, instead of the usual 1-year warranty.

All these features added up to the most well-rounded, heavy-duty air impact wrench available.

Price
9
Power
10
Durability
9.5

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