The expensive part isn’t the tool. It’s the battery ecosystem. After six years and roughly $180,000 in tool purchases for a 40-person electrical and mechanical crew, that’s the conclusion I keep coming back to. If you’re asking “what angle grinder should I buy?” and you’re looking at Hilti cordless tools, the real question is not which grinder. It’s which battery system you’re committing to. For most pros who work with concrete, steel, or solar every day, the Hilti Nuron platform is worth the premium. In that context, a Hilti hammer drill cordless combo and the angle grinder make sense. For occasional use, they’re overkill.
I’m not an influencer, and I don’t get free tools. I’m a procurement manager at a contracting company that does electrical, mechanical, and rooftop solar installations. I’ve tracked every tool order in our cost system since 2019—about 200 orders, $180,000 in cumulative spend. In 2023, we ran a formal comparison of four cordless platforms before standardizing on Nuron. I still have the spreadsheet. It’s not exciting, but it tells the truth.
Everything I’d read said you pay a big premium for Hilti and get the same tool as anywhere else. In practice, the cost difference showed up in downtime, repair turnaround, and battery warranty—not in the list price.
That’s the part that’s hard to see when you’re staring at a tool wall. So let me show you what changed my mind, and then give you a practical answer to the angle grinder question.
Why I changed my mind about Hilti cordless tools
In 2022, we logged 41 tool downtime incidents. Most weren’t catastrophic—a drill that stopped working, a battery that wouldn’t charge. But each incident cost us an average of 3.2 hours of crew time because we had to wait for a replacement or send a journeyman to the supply house. That’s about 130 hours lost in a single year. When I put that into the TCO spreadsheet, the “cheap” platform stopped looking cheap.
I used to think tool buying was simple: pick a decent brand, match the voltage, get a spare battery, move on. But after a few years of tracking invoices, I realized the biggest cost isn’t the tool on day one. It’s the batteries, the chargers, the repair turnaround, and the crew’s downtime while a tool sits in the shop. That’s where Hilti’s direct sales and service model changes the math.
We standardized on Nuron in early 2024. Here’s what we’re actually buying.
Hilti cordless tools I’d buy today
Hilti hammer drill cordless: TE 6-22
For concrete anchors and small core work, the TE 6-22 is the one. It pairs with the B 22-115 battery well enough for a full day of 10mm anchor holes. We chose it over the lighter TE 4-22 because we needed SDS Plus and mode switching for chiseling. If you only drill holes, the TE 4-22 is lighter and cheaper. But if I could keep only one hammer drill cordless tool from Hilti, it would be the TE 6-22. The vibration control matters when you’re drilling overhead anchors all day. Simple.
Angle grinder: AG 4-22
Now, the “what angle grinder” question. For most of our trades, my answer is the AG 4-22, a 125mm / 5-inch angle grinder. I picked it because it shares the same B 22 battery as the hammer drill. It’s not the fastest grinder Hilti sells—the AG 5-22 and AG 6-22 are there for heavier cutting—but for cutting strut, threaded rod, and the occasional tile backer, the AG 4-22 is the right weight and runtime.
Here’s the thing people forget: the best angle grinder is the one that’s still charged when you need it. That only happens if it fits your battery system. The AG 4-22 is a good grinder, but its real advantage is that it uses the same batteries as every other Hilti tool on my list. That’s it.
Electrical screwdriver set: don’t overbuy
When people search for an electrical screwdriver set, they usually expect a plastic case with 47 bits and a driver that only accepts proprietary bits. We don’t buy that. With Hilti, the useful tool is the SI 4-22 cordless screwdriver—or the SID 4-22 impact driver if you need more speed. Both take standard 1/4-inch hex bits. Hilti’s bit sets are good, but any quality hex bits will work. The cost saving here isn’t in Hilti’s kit. It’s in not paying for bits you already own.
Not exactly a selling point. But in procurement, that’s where waste lives.
PV connection solar tool set: where Hilti surprised me
Solar work is where Hilti really changed my thinking. The PV connection solar tool set—specifically the SJT 6-22 solar junction box tester and the NCR 60C-22 cordless crimping tool—isn’t a gimmick. We tested it on a 400-panel commercial rooftop install in 2024.
The tester cuts the time to verify MC4 connections from a random spot-check to a full 100% check. That’s a big deal when the system owner asks for verification records. The crimping tool gives consistent connections, which reduces callbacks. It was expensive. It paid for itself in one installation. (I’m writing this in January 2025, so verify current bundles—Hilti changes things often.)
Where the real money goes
If you’re still comparing list prices, you’re missing the point. Here’s what I track instead:
- Batteries. The biggest line item. Nuron batteries are smart, and they cost real money. We standardized on one platform so every battery works with every tool. That means we’re not maintaining four charger types and a drawer full of dead batteries.
- Service. Hilti’s direct service model means we call, they ship a replacement, and we send in the broken tool. Our average repair turnaround went from two weeks to five days. In contracting, that’s often worth more than the price difference on the tool itself.
- Warranty. Hilti’s two-year warranty on cordless tools isn’t unique, but their battery replacement during warranty is. In 2023, we had four batteries replaced. At $150 to $350 each, that changes the spreadsheet.
That’s why I keep saying the tool isn’t the purchase. The ecosystem is the purchase.
How to choose the right angle grinder
If you’re still stuck on “what angle grinder,” compare these specs before anything else:
- Disc size: 125mm for general work. 180mm or 230mm for heavy cutting, but those get heavy and eat batteries.
- Power delivery: Brushed versus brushless matters less than how the tool holds speed under load. A good brushless motor with electronics will keep the RPM up in a cut.
- Weight and handle: If you’re cutting overhead or on a ladder, the difference between 2.3kg and 3.1kg is a full afternoon of forearm pain.
- Battery compatibility: If you already own a cordless system, the angle grinder should match it. That makes the AG 4-22 my default recommendation for Hilti users.
When Hilti doesn’t make sense
I’d be lying if I said Hilti is always the right answer. If you’re a one-trade flatwork crew doing occasional anchor holes, a corded rotary hammer and a lighter-duty cordless grinder will get you to the same place for less money. If you’ve already invested thousands of dollars in another cordless platform, switching everything to Hilti is a hard conversation with your accountant. The tool cost is one thing. The battery repurchase is the larger bill.
One more boundary: my experience is based on commercial and industrial work in the U.S., mostly electrical, mechanical, and rooftop solar. If you’re doing heavy demolition or concrete sawing all day, the AG 4-22 will feel underpowered. That’s a different conversation. My sample won’t match a guy cutting eight-inch concrete slabs every day.
So what angle grinder should you buy? If you’re already in the Hilti ecosystem, start with the AG 4-22. If you’re not, the first Hilti cordless tool to buy is the TE 6-22 hammer drill—and add the PV connection solar tool set if you do solar work. But decide based on the battery platform, not the tool. That’s the part that’s hard to change later. The angle grinder is just another attachment to that decision.
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