DeWalt 60V MAX 7 in. - 9 in. Large Angle Grinder

Why I reached for this 60V 7–9 in grinder

Cordless grinders have been great for 4-1/2 to 6-inch work for a while, but stepping up to the 7–9 inch class without a cord is a different challenge. I brought this 60V 7–9 in grinder to a few jobs that normally demand a corded 15-amp tool: beveling heavy plate, slicing angle and pipe, chasing cracks in a garage slab, and knocking down high spots with a diamond cup. I wanted to see if I’d miss the cord. I didn’t—at least not for most tasks.

Power and speed

The brushless motor is rated at 3,000 MWO, and the no-load speed is 9,000 RPM. Ratings aside, performance is what matters: with a 7-inch grinding disc on mild steel, it behaves like a strong 15-amp corded unit. I could lean on it to bevel 1/4-inch plate without it laboring, and it stayed at speed when cutting 3/8-inch angle with a 9-inch wheel. It will trip the E-CLUTCH if you bury the wheel or bind it aggressively, but that’s the system doing its job, not the motor running out of breath.

Where it impressed me most was surface prep. With a 7-inch diamond cup on old concrete, it kept the wheel spinning cleanly while I took down high spots and feathered edges. It’s easy to glaze a cup and tax a grinder on concrete; here, the motor had the reserve to keep the cut consistent.

Safety and control

Large grinders are unforgiving when something goes wrong. The safety suite here is well thought out:

• The Kickback Brake snaps the wheel to a halt quickly on a pinch or stall. I intentionally forced a bind in a controlled cut, and the wheel stopped fast enough that it didn’t yank the tool around.
• The E-CLUTCH trips under overload and prevents the motor from powering through a hard lock-up. It resets instantly once you back off.
• The no‑volt switch prevents an automatic restart after a battery swap or a power interruption. That’s essential when you’re swapping packs mid-cut.

The trigger has a positive lockout and a consistent feel, and the included side handle gives good leverage. With any 7–9 inch grinder, two hands and a solid stance aren’t optional—they’re the operating procedure. This one rewards proper form; it tracks straight and feels predictable under load.

Ergonomics and weight

It’s a big grinder and it feels like one. Ready to work with a 9Ah pack and a 9-inch wheel, it’s around the mid-teens in pounds. Balance is more important than the number on the scale, and the balance here is good—battery mass low and to the rear, motor forward. That rearward weight helps when you’re flattening concrete or running long cuts because the tool doesn’t feel nose-heavy.

Vibration is reasonable for the class. On steel with a 7-inch wheel, it’s comfortable for extended passes; on concrete with a cup, it’s as chattery as any grinder will be, but the grip shape and handle damping keep it manageable. After an hour of on-and-off grinding, my hands weren’t buzzing, which isn’t always the case with big cordless grinders.

Runtime and charging

Runtime depends heavily on the task and wheel. With the included 9Ah packs:

• Heavy grinding on steel (7-inch wheel): roughly 8–12 minutes of continuous grind time per pack.
• Mixed cutting and light grinding: 15–20 minutes of active trigger time per pack.
• Concrete flattening with a diamond cup: typically on the shorter side due to load—closer to the heavy grinding window.

That’s the reality of a cordless tool in this power class: it does corded work, but it drinks power doing it. The kit’s two batteries make sense—you can work off one while the other charges. On the included 6-amp charger, a 9Ah pack typically takes around 90–120 minutes to refill depending on temperature. For production or field sharpening rounds, I’d plan on at least a third 9Ah pack and, if possible, a faster or dual-port charger to keep rotation smooth. If you regularly work remote, a vehicle-mounted charging solution helps close the loop.

The upside is that efficiency is good. The motor doesn’t feel like it’s wasting energy as heat, and under light-to-medium tasks it sips instead of gulps. Compared to other cordless 7-inch grinders I’ve used, I got slightly longer cuts before swapping packs.

Setup, guards, and accessories

The kit is comprehensive: two 9Ah batteries, a charger, side handle, both 7-inch and 9-inch guards, a spanner, outer flange, and a bag. Swapping between the 7 and 9-inch guards is quick, and the guard indexing is positive with a firm clamp. The spindle hardware is standard fare, so your existing 7–9 inch discs and 5/8-11 accessories should fit without drama.

There’s no variable speed; it’s a single-speed 9,000 RPM grinder. For metalwork and most concrete cutting, that’s appropriate. If you need to run specialty abrasives or wire wheels at lower RPM, you’ll need a different tool or a dedicated variable-speed grinder.

Dust collection is not included out of the box beyond the guard. For concrete work, pair it with a proper shroud and a dust extractor; that’s where the wireless features come in handy.

Wireless features and tracking

Two bits of connectivity are onboard:

• Wireless Tool Control lets you pair the grinder with a compatible dust extractor so the vac starts and stops with the trigger. For concrete grinding and chasing cuts, that’s genuinely helpful—no extra remotes or reaching for the vac between passes.
• The Tool Connect chip pocket makes the tool “chip-ready” for jobsite asset tracking. If you’re already using a fleet management platform, dropping a chip in takes a couple of minutes and gives you location and inventory data without zip-ties or epoxy tags.

Neither feature changes how the grinder cuts, but they do make day-to-day workflows smoother if you’re invested in the ecosystem.

What it’s great at

• Corded-class cuts without a cord: plate beveling, slicing angle and pipe, and general heavy fabrication tasks.
• Concrete surface prep and chase cuts when paired with a shroud and extractor.
• Safe, controlled operation in high-risk binds thanks to the brake and clutch systems.

In short bursts or task-based work (cut here, grind there), it’s fantastic—you move faster without dragging cords and breakers aren’t a concern.

Where it’s less at home

• All-day grinding on thick stock without multiple batteries and a fast-charging plan. If you’re sharpening dozens of blades or doing continuous concrete removal, you’ll cycle packs quickly.
• Specialty low-speed abrasives. Single-speed at 9,000 RPM limits some accessory choices.
• Overhead work for long periods. The size and weight make that taxing, as with any grinder in this class.

Reliability and serviceability

Across a few weeks, I didn’t encounter thermal shutdowns or odd behavior. The protection electronics are transparent until they need to intervene, and the tool resets cleanly after a trip. The guards and side handle hardware are robust; nothing feels flimsy. As always, keep vents clear and discs sharp—this grinder rewards good consumables with better runtime and less chatter.

The bottom line

This 60V 7–9 in grinder delivers real large-grinder performance without the leash of a cord. The safety systems are more than marketing—they actively keep the tool in bounds when a cut goes sideways. Ergonomics are solid for the size, and the kit gives you everything you need to start working, including two high-capacity batteries.

Recommendation: I recommend this grinder to fabricators, concrete pros, and maintenance crews who need 7–9 inch capability away from outlets or where cord management slows the job. It can credibly replace a corded 15-amp grinder for task-based work and short production runs, with the caveat that heavy, continuous grinding will require extra batteries and a charging plan. If you already own compatible batteries and value the Wireless Tool Control and chip-ready tracking, it’s an even easier yes. If your day is eight hours of uninterrupted grinding at a bench, a corded unit still makes more economic sense—but for everything else, this cordless grinder earns its spot.