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Cordless Impact Wrenches

Show me 22V cordless impact wrenches designed for performing light- and heavy-duty anchoring and bolting in metal, wood and concrete

Show me 22V cordless impact wrenches designed for performing light- and heavy-duty anchoring and bolting in metal, wood and concrete
SIW 6-22 ½” Cordless impact wrench Power-class cordless impact wrench with 1/2" friction ring anvil for a wide range of concrete anchoring and steel or wood bolting (Nuron battery platform)
SIW 2-A12 Cordless impact wrench Subcompact-class cordless impact wrench with 3/8” friction ring anvil for economical anchoring and bolting, especially in cramped spaces

Cordless impact wrenches

Get the torque you need when anchoring in concrete, lag bolting in wood and bolting steel

Hilti´s range of 22V cordless impact wrenches covers all your fastening needs, from compact wrenches for hard to reach spots, to powerful ones for heavy duty jobs. The tools are compatible with Hilti’s Adaptive Torque system (SI-AT-22), a small, light interface which slots in between the impact wrench and the battery and quickly tells you when an anchor has been correctly installed.

Work faster with the right impact wrench for your task

Choose between the right-angled SIW 4R-22 for tight spaces, the compact SIW 4AT-22 for non-structural fastening, the mid-torque SIW 6AT-22 (coming 2024) for a broader range of applications, and the more powerful SIW 8AT-22 (coming 2024) and SIW 10-22 (coming 2024) for structural applications.

More accurate anchoring with fasteners designed specially for our impact wrenches

Our cordless impact wrenches have been carefully designed to work together with the appropriate fasteners, helping you set them correctly every time, without damaging fasteners or base materials. For even quicker, more accurate torquing, try our Adaptive Torque module. 

Simpler documentation of fastenings for easier compliance

Hilti's Adaptive Torque module documents every executed fastening, providing better accountability and more back-office efficiency, and reducing the risk of failed inspections.

Torque it safely the first time

Lower the risk of rework with Hilti's Active Torque module

Correcting mistakes on a jobsite can add time and money to already stretched budgets. Our Adaptive Torque module works with our impact wrenches to quickly and easily confirm if an anchor has been torqued according to ETA approvals. The built-in barcode scanner allows for easy, efficient setup while reducing opportunities for mistakes. Afterwards, the tool can be connected to a computer to instantly create a detailed installation certificate, saving you time on paperwork and back-office headaches down the line.

Don’t let jobsite downtime get you down

Avoid tool downtime with more robust fastening solutions and self-repair options

Increase your tool lifetime and reduce your downtime by choosing between our two more robust solutions: the 1/2” anvil with friction ring socket fixation or the 1/2” detent pin anvil. Hilti’s SIW 6AT-22 and SIW 8AT-22 cordless impact wrenches both come with friction ring anvils, with a self-repair offering of spare friction rings, so you can quickly and easily exchange worn frictions rings. The SIW 4AT-22 wrench comes with an improved detent pin solution, which means its internal structure is less likely to weaken over time, giving you a longer-lasting solution for the jobsite.

Built for small spaces

Reach into tight spots with a right-angled impact wrench

Thanks to the brushless motor and Nuron platform, our cordless impact wrenches are more compact and lighter, making them easier to get into hard-to-reach spaces and more comfortable to hold for longer.

For extra-tight spaces we have the SIW 4R-22, a right-angle impact wrench with enough power to get the job done. Its longer grip and in-line battery interface means you can reach even further into those confined spaces – all illuminated by a strong LED light.

How to choose the right impact wrench

What is a cordless impact wrench used for?

An impact wrench is a socket wrench power tool which delivers high rotational torque and high torque output with minimal effort. It is great for tightening and loosening bolts, lug nuts and rusted fasteners. 

What is the difference between an impact driver and an impact wrench?

While these two tools may look similar, they are better suited to different applications. Impact drivers only come with a 1/4” hex collet that accepts 1/4” hex shank bits. They tend to be more focused on speed rather than power and are more suited to smaller projects. Impact wrenches usually come with a square drive, available in different sizes. But the main difference is the high impact force an impact wrench can produce. This can make impact wrenches heavier, but better suited for tougher jobs where more power, or torque, is required, such as fastening larger anchors, hex-head bolts, nuts, lag screws, or tackling extremely tight, or rusted fasteners.

What size impact wrench do I need?

The size of an impact wrench is mostly related to the size of the bolts you will be working with, and the torque that is required. Generally speaking, the bigger  the impact wrench, the bigger bolts it can handle, and the more torque it provides.

What chuck size do I need for my impact wrench?

All impact wrenches have a square drive chuck, and these come in different sizes, such as 3/8”, 1/2” and 3/4”. The chuck size relates to the impact socket you want to use.

How much power do I need when choosing an impact wrench?

When it comes to impact wrenches, power is measured by torque. The higher the torque value, the greater the force, but be aware that there is no way to accurately measure the maximum torque of an impact wrench, so it is always best to request a demonstration, or test the wrench with the application.

What mistakes should I avoid when using an impact wrench?

Mismatching sockets: impact wrenches are not compatible with regular sockets and can cause slippage and damage when under strain. Be sure to use the correct sockets for your wrench.

Over-tightening: it is easy to overtighten when using an impact wrench as it will continue to tighten as long as the trigger is pulled.

Damaging threads: it is better to start the bolt or nut by hand, as using your fingers will let you know if the hole and the fastener are properly aligned.