Professional Tool Reviews for Pros

By adding a brushless motor and shifting to the Nuron platform, Hilti's Power Class 1/2-inch impact wrench dropped some serious size and weight. While there are other options in the same size range with higher overall torque, this model is purpose-built for construction applications with a durable build to survive tough environments.

When Hilti translated their power class cordless impact wrench over to the Nuron line, they weren’t content to put an old tool in a new housing. We got our hands on the Hilti Nuron 1/2-inch impact wrench to see how it compares to its predecessor.

Hilti considers the SIW 6-22 part of their Power Class, reaching into the mid-torque range and taking advantage of a brushless motor. On paper, mode 1 nets you 1500 RPM and 221 ft-lbs of torque. Mode 2 kicks it up to 1750 RPM and 332 ft-lbs.

We turned to our Inertia Torque L-1000 impact tool torque tester to see what kind of working torque you can expect. Most impact wrenches we test hit between 65% and 85% of their listed torque and it gives you a more realistic idea of how much torque gets to the fastener. In Hilti’s case, mode 1 stabilized at 209 ft-lbs and mode 2 settled in at 267 ft-lbs.

So what is this tool a good fit for with those torque values?

You can certainly use it in automotive applications, but that’s not Hilti’s primary target. Looking to the construction industry, we see what they’re targeting.

Of course, there are plenty of other applications, but these are some Hilti specifically designed the tool for.

Picking the tool up, Hilti slimmed down the handle some and it’s a really comfortable design. It’s a bulky design, though. The Nuron battery has a slightly larger footprint than the previous 22V packs and it’s got some weight to it. Bare, the impact wrench weighs 4.0 pounds and the 4.0Ah battery puts the total at 5.7 pounds.

The positive is that it’s not way out of range for a mid-torque design, the balance is excellent with the 4.0Ah battery, and it has a very durable feel to the build. It also happens to be nearly a pound lighter and 2 inches shorter than the previous version (SIW 22T-A).

As a bare tool, the Hilti SIW 6-22 runs $284 each, or $8.00 monthly if you’re using the Fleet Service program. The best battery for this model is the B 22-85 (4Ah) at $114 each. All Nuron batteries are compatible, but the smaller B 22-55 pack really limits your runtime and the larger packs make the tool awfully bulky.

The $39 C 4-22 charger is a great way to go, or you can snag the $84 C 6-22 if a fast charger is what you need.

As usual, Hilti’s 20-2-1 warranty applies to the Nuron impact wrench as well.

By adding a brushless motor and shifting to the Nuron platform, Hilti’s Power Class 1/2-inch impact wrench dropped some serious size and weight. While there are other options in the same size range with higher overall torque, this model is purpose-built for construction applications with a durable build to survive tough environments.

Discover more Hilti Nuron tools here.

On the clock, Kenny dives deep to discover the practical limits and comparative differences for all kinds of tools. Off the clock, his faith and love for his family are his top priorities, and you'll typically find him in the kitchen, on his bike (he's an Ironman), or taking folks out for a day of fishing on Tampa Bay.

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Professional Tool Reviews for Pros

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