Ingersoll Rand W7150-K2 1/2-Inch High-Torque Impact Wrench Review


Reviewed by:
On January 25, 2015
Last modified:January 26, 2015


A cordless impact wrench designed for use by professionals and powered by a 1900 RPM motor giving 1100 ft-lbs of torque. It is an exceptional piece of equipment well suited for mechanics, hobbyists, heavy equipment workers, construction sites or projects and more.

The Ingersoll Rand W7150-K2 is a workhorse power tool designed for use by professionals on the job site as well as everyday use around the home or on projects. In its role as an impact wrench (or ImpacTool as it is refered to by Ingersoll), the W7150-K2 delivers the high torque necessary for working with sockets, nuts and bolts with minimal effort from the user. Massively improving efficiency and reducing fatigue, the impact wrench has come to be a staple for mechanics of all kinds, from everyday automotive to massive heavy equipment jobs, as well as construction workers and various types of product assembly.

Taking A Closer Look At The Rand W7150-K2

Let's get a bit more personal with what the W7150-K2 brings to the table by taking a look at some product specifications:


Ingersoll Rand W7150-K2
Ingersoll Rand W7150 K2
Drive Size
1/2 inch
780 foot-pound
1900 rpm
Power Source
Battery powered
6.8 pounds
Sound Level
100 dB
9.4 x 15.3 x 5 inches

The cordless impact wrench comes with the following addons:

  • Long-lasting rechargeable Lithium Ion battery (1 battery and charger)
  • Carrying case for wrench, battery and charger
  • Up to 3 year limited warranty

The Power of Torque

When it comes to wrenches, be they manual or powered, the ultimate consideration is its ability to generate torque. Torque is the ability of a force (such as a wrench and a muscle or a motor) to rotate an object around an axis (like a bolt coming out of its socket.) When looking at impact wrenches – sometimes referred to as torque guns – they are rated in ft-lbs, or feet-pounds, which is a unit of torque.

This can all seem a little confusing when shopping for your first impact wrench – what does it all mean? It is actually quite simple: the amount of torque as measured in ft-lbs corresponds to various ratings and makes of nuts. As mentioned above, the Rand W7150-K2 produces 1100 ft-lbs of torque. This is more than enough to handle most automotive applications, taking the lug nuts off tractors and other heavy equipment, or much more.

Remarkably Cordless

In the world of impact wrenches, there are two primary choices: air-powered or battery-powered. Air powered solutions, like the Aircat 1150, rely on the aid of an air compressor to generate their torque, which can produce extremely powerful results but has the unfortunate side effect of chaining the user to a long air hose. Battery powered solutions like the W7150-K2 free users completely from any concerns of cords or hoses, but battery power cannot quite compete with the massive pressures of pneumatics. Fortunately for anyone looking to free themselves from an air hose, the Ingersoll Rand W7150-K2 manages to extract more than enough torque out of its battery to handle most applications without breaking a sweat.

The cordless nature also makes it significantly more maneuverable and easier to use in tight spaces often encountered in engine compartments or small maintenance spaces. A reduced footprint, combined with being substantially cheaper than purchasing an air compressor and additional tools, has made battery-powered solutions like the Rand W7150-K2 a winning solution which is becoming ubiquitous in the world of power tools.


  • Long lasting battery lets you spend more time working and less time waiting. Bonus: charging only takes about 30 minutes
  • Ergonomic handle and soft-grip coating make it comfortable to hold and use for long periods
  • Fairly low noise level to spare your ear drums (rated at 100 dB)


  • Aluminum design can make the body feel a little less “sturdy” than some other, heavier solutions
  • Some users report problems with the trigger wearing out

Customer Feedback

Let’s take a look at a few other customer reviews from Amazon to get some idea what users think.


User kingcuong left a 4 star rating and writes:

"I am a technician at a Mercedes Benz repair shop. I have used this gun every day since I have purchased it off of the tool truck. The gun is able to break free axle nuts (largest I tried was 36mm) crank pulleys, seized and rusted lug bolts, brake caliper bracket bolts, etc. It also works great to remove and press in ball joints. Basically, there is nothing that I have found that the gun couldn't deal with. However, I was using it to remove lug bolts two weeks ago, and the gun began to smoke and the motor became very hot. The motor stayed warm for at least 2 hours, which was very unusual. This was the first task of the day, and the gun had not been used before. Typically when you release the trigger, the anvil stops as well, but after this incident, the stop no longer works in either direction. The gun also seemed to have loss a considerable amount of power. I have sent the gun in for repair, and will update at a later time.”

Later he added:

“I have received my Impact Gun back from Repair. The gun was just completely replaced. I am a very satisifed customer and would recommend the product highly."


User Serge seemed to have some issues with the device, but still left it 3 stars and wrote:

"Since I have owned this tool I have had to replace one battery because of charging issues (Replaced under warranty in about two weeks). And since then I have had to send the gun in due to the trigger burning out (Also under warranty). When it is working though, this thing is a beast!"


Finally, user sd-dirt left a 5 star rating and wrote:

"Top notch. This is the best you can buy. I saw a poster was concerned about the sturdyness of it. We accidentally left ours in the way of an 85,000lb machine and it got tracked over. The only damage was a few grouser marks from the tracks. Has been working flawless for 1 year now. If you couple it to any of the competitions cordless guns, it will shell out the competitors gun. One thing I would like to note, they do require periodical maintenance. You have to apply a THIN coating of grease to the orbit gears. Not at all a big deal."


Hopefully you have found this informative and useful! In the course of our review of the Ingersoll Rand W7150-K2, we found it to be an exceptional piece of equipment well suited for mechanics, hobbyists, heavy equipment workers, construction sites or projects and more. No doubt there are plenty of other applications in which this impact wrench would find itself at home: a tool always awaits a clever mind to put it to novel uses.

Leave a Reply

Your email address will not be published. Required fields are marked *