DeWalt 4-1/2 in. (115 mm) - 6 in. (125 mm) Trigger-Switch Grinder

Overview

I put this DeWalt trigger-switch grinder to work the way I use any shop standby: beveling plate, cleaning up thermal-cut edges, knocking down welds, and occasionally switching to a 6-inch wheel for deeper reach. It’s a straightforward, corded 13-amp machine with a fixed 9,000 RPM, and it’s built around the classic 5/8-11 spindle so most of the consumables I keep on hand fit without drama. The package includes Type 27 guards for 4.5-, 5-, and 6-inch wheels plus the flanges and a side handle, which is more complete than many grinders out of the box.

What it doesn’t include is just as telling: there’s no electronic clutch, no kickback brake, and no mechanical brake. That sets the tone for the tool. It’s a strong, no-nonsense grinder intended for people who prioritize sustained metal removal over extra safety electronics. Used with good technique and the right guards, it’s a workhorse.

Build and Ergonomics

At 8 pounds with a long 19.75-inch body, this isn’t a compact grinder. The length works in your favor for leverage during heavy grinding, and the rear trigger grip feels secure with a gloved hand. The trigger’s lock-on function is welcome for long passes along a flange or plate, but—as with any lock-on—use it thoughtfully and be ready to unlock before lifting off the work.

The side handle is the usual DeWalt fare—stout enough and comfortable. Balance shifts forward with a 6-inch wheel and the larger guard, but the tool stays predictable. The gear case gets warm during long sessions, yet the rear stays manageable. Vibration is well controlled for a 13-amp unit; with a well-balanced wheel, I could run it for extended periods without tingling fingers.

The 6.31-foot cord is serviceable, though I’d prefer closer to 10 feet for shop use. Plan on an extension cord and make sure it’s appropriately sized; a 13-amp grinder pulls real current under load.

Power and Performance

DeWalt rates this motor at 13 A and 1,700 max watts out, and it behaves like a grinder in that class should. With a fresh 36- or 40-grit flap disc, it removes material aggressively on mild steel without bogging. Swapping to a 6-inch Type 27 grinding wheel, the extra radius translates into a wider footprint and deeper reach when blending bevels or working into copes and web transitions. The fixed 9,000 RPM is on the fast side for 6-inch accessories, but within the spec of most 6-inch bonded wheels and many flap discs. Always check the wheel’s rated RPM.

Under heavy load—say, dressing a thermal-cut edge on 1-inch plate—the grinder hangs onto speed convincingly. You can stall it if you truly lean on it, but in practical use I didn’t feel the need; let the wheel cut and it keeps pace. Compared to typical 11-amp bodies, the extra torque is noticeable, especially when you want to keep the wheel flat and let the abrasive do the work across a broad area.

I also ran the tool from a DC-capable welder/generator. With proper gauge cord and a clean power source, performance was essentially unchanged—nice to see the AC/DC rating used in real life.

Dust and Debris Management

Angle grinders live in grit. The Dust Ejection System on this one is a simple idea—direct air and debris flow to keep particles from settling in the motor—and it seems to help. After several gritty sessions, I didn’t find the telltale accumulation around the windings you sometimes see. It’s not a dust extractor, of course, but paired with a surface grinding shroud and a vac, the tool stays surprisingly clean. Regardless, I make a habit of blowing out the vents at the end of the day.

Controls and Safety

The trigger switch has a positive feel and the lock-on mechanism engages cleanly. I prefer a trigger to a slide switch for gloved work; it’s harder to bump on and easier to disengage when repositioning. The absence of an electronic clutch and kickback brake is the bigger consideration. If a wheel binds, the motor will react with the usual torque twist. Two-handed control and body positioning become non-negotiable.

If you plan to do a lot of cutting, I’d recommend sourcing the appropriate Type 1 cutting guard to go with your cutting wheels. This kit includes three Type 27 guards for grinding, which is excellent coverage for grinding work but not a substitute for a proper cutting guard.

As always: use guards matched to wheel size, never exceed the wheel’s RPM rating, and wear PPE. This grinder is powerful and honest; it expects you to be the same.

Compatibility and Accessories

• Wheel sizes: 4.5, 5, and 6 inches (Type 27 guards included for all three)
• Spindle: 5/8-11, which means most North American wheels, cups, and shrouds are a direct fit
• AC/DC capability: handy for generator or welder power on site
• Side handle and standard flanges included

Switching guards is straightforward; the included 6-inch guard is bulkier but invaluable when you need reach or want to keep a flatter approach angle while blending. I appreciate that DeWalt includes all three sizes; it makes the tool a flexible platform instead of locking you into a single diameter.

Heat, Noise, and Maintenance

Like most high-speed grinders, this one is loud and throws heat from the front end. Expect to wear hearing protection at all times. Under continuous load, the head warms up but never went past uncomfortable for me; the motor housing stayed manageable. A brushed motor will eventually want new brushes; DeWalt’s service window and warranty are solid backstops if you’re putting serious hours on it.

The gear mesh feels tight—no rattle or lash—and there’s no discernible play in the spindle. The tool inspires confidence that it will handle daily shop duty without much fuss.

What Could Be Better

• No clutch or brake: For some users, that’s a dealbreaker. If you’re cutting often or working overhead, electronic safety controls add real value.
• Weight and size: The long body and 8-pound weight are the price you pay for durability and power. In tight frameworks, it’s not the nimblest.
• Fixed speed: A single 9,000 RPM is fine for metal grinding, but it rules out some accessory types and materials that benefit from slower speeds.
• Cord length: Functional but short. A longer, supple cord would be welcome.

None of these are flaws so much as design choices. DeWalt clearly aimed for a durable, powerful grinder without electronic frills.

Who It’s For

• Fabrication shops and field welders who spend more time grinding than cutting
• Users who want the flexibility to run 4.5-, 5-, and 6-inch grinding wheels on one body
• People comfortable managing kickback risk through technique rather than electronics
• Jobsites where AC/DC compatibility matters

If you’re a homeowner doing occasional metalwork, you may prefer a lighter 4.5-inch grinder. If you’re a pro who prioritizes cutting and wants maximum safety, look to a grinder with an E-clutch and brake. If your work is predominantly grinding steel and prepping welds, this one hits a sweet spot for power, durability, and included guards.

Recommendation

I recommend this DeWalt trigger-switch grinder to anyone who needs a robust, no-nonsense grinder for daily metalwork and values power and durability over electronic safety features. It’s a strong performer with 6-inch capability, a complete guard set, and the kind of build that stands up to shop grit. Just go in with eyes open: use the right guard for the job, keep a firm two-handed grip, and respect the tool. If that matches how you work, this grinder will earn its keep. If you want a clutch, a brake, or a lighter package, you’ll be happier with a different style of grinder.