What's inside
As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.
The Milwaukee M18 FUEL angle grinder and DeWalt DCG413 are both 4½-inch cordless grinders built for cutting and grinding without an extension cord. The buying decision is less about brand loyalty than control: how each tool starts, handles a bind, and fits the batteries you already own. Battery and kit configurations vary, so compare bare-tool prices and battery requirements before choosing.
As an Amazon Associate we earn from qualifying purchases at no extra cost to you.
Our Top Picks
Milwaukee 2880-20 M18 Fuel Brushless Lithium-Ion 4-1/2 in.Large13 x 8.5 x 3.5 inches5 PoundsCheck on Amazon
Milwaukee M18 FUEL 18-Volt Lithium-Ion Brushless Cordless 516 x 4 x 7 inches4 x 16 x 7 inches1.2 poundsCheck on Amazon
DEWALT 20V MAX* Angle Grinder Tool Cordless BrushlessOne Size12.2 x 4.7 x 6 inches3.75 poundsCheck on Amazon
At a glance
| Feature | Milwaukee M18 FUEL angle grinder | DeWalt DCG413 |
|---|---|---|
| Wheel size | 4½ inches | 4½ inches |
| Battery platform | Milwaukee M18 | DeWalt 20V MAX |
| Speed control | Variable-speed versions are available; confirm the exact model | Fixed-speed, roughly 9,000 rpm |
| Start and stop controls | Model-dependent; check switch style and safety features | Paddle switch with brake and kickback protection |
| Best fit | Owners who want a grinder that matches their M18 batteries, especially when choosing a variable-speed model | Owners on DeWalt 20V MAX who want a straightforward, fixed-speed grinder |
“M18 FUEL angle grinder” covers more than one version. Milwaukee has sold different grinder configurations, including models with different switches and speed controls. Check the model number and manual rather than assuming every M18 FUEL grinder has the same features. The DCG413 is a specific fixed-speed model. That difference matters more than small claims about power that are hard to compare across manufacturers.
Control, startup, and stopping
The DCG413’s paddle switch is easy to reach while holding the grinder with two hands. Its brake is designed to stop the wheel quickly after release, while its kickback protection can shut the tool down if a wheel binds. These features help manage the tool, but they do not prevent a bind or make an unsafe cut safe. Keep both hands on the grinder and position yourself out of the wheel’s path.
Milwaukee’s controls depend on the particular M18 FUEL model. A variable-speed version gives more choice for tasks such as working with a flap disc or wire brush, where maximum speed may be unnecessarily aggressive. It also adds a setting to manage: choose a speed suitable for the accessory, and do not exceed the accessory’s rated rpm. If you mainly cut steel with standard abrasive wheels, fixed speed is often simpler and entirely adequate.
For either tool, let the wheel reach speed before contacting the work. Don’t twist a cut-off wheel to steer it, and don’t force the grinder when it slows. A stalled wheel can grab, damage the disc, or kick the tool sideways. Inspect wheels for cracks and use the correct guard; a cut-off wheel and a grinding wheel are not interchangeable just because they fit the spindle.
Cutting and grinding in practice
Both grinders suit common site and shop jobs: trimming threaded rod, cutting small steel sections, removing weld spatter, and dressing edges. A 4½-inch wheel is portable, but its depth of cut is limited. If you routinely cut thicker stock, expect to rotate the workpiece, make more than one pass, or move up to a larger grinder. On cordless tools, long, heavy cuts also drain batteries faster than brief cleanup work.
Battery choice affects balance and runtime. A compact pack keeps the tool lighter for overhead work, but may run out sooner under sustained load. A larger pack can provide more working time, at the cost of added weight and bulk. For repeated cutting, have a charged spare ready rather than pushing a hot tool or battery through a long run. Check the grinder’s manual for approved battery and accessory guidance.
Neither platform changes the basic failure modes. Abrasive discs wear, thin cut-off wheels can snap if side-loaded, and wire wheels can shed bristles. Clamp small work securely, keep the guard between you and the wheel, and wear eye and face protection. If a wheel binds, release the switch and wait for it to stop before freeing the work.
Which one should you buy?
Choose the DCG413 if you already own DeWalt 20V MAX batteries and want a fixed-speed grinder with a paddle switch, brake, and kickback protection. It is a sensible choice for general cutting and grinding; paying extra for variable speed is hard to justify if your work is mostly steel cutting and occasional weld cleanup. Compare the bare tool with a kit, since buying another battery and charger can erase an apparent price advantage.
Choose an M18 FUEL grinder if your batteries and chargers are already Milwaukee, or if a specific variable-speed M18 model suits your mix of accessories. Verify the model number, switch design, and listed features before ordering. If you are starting from scratch, compare complete kits rather than bare tools, and price batteries separately. See current listings for Milwaukee M18 FUEL angle grinders and the DeWalt DCG413.
If you only need a grinder for a few short cuts, the cheaper option on your existing battery platform is usually fine. If you have no batteries yet, estimate how often you will use the tool and whether you need variable speed before paying for a platform. For repeated, demanding work, compare the cost of batteries and the weight of a larger pack alongside grinder price; those details shape the job more than the badge on the housing.