DeWalt DCG413 vs Makita XAG09: Comparing Brushless Cordless Grinders

As an Amazon Associate I earn from qualifying purchases. This post may contain affiliate links at no extra cost to you.

The DeWalt DCG413 and Makita XAG09 are both 4-1/2″ brushless cordless grinders aimed at the same user: someone cutting rebar, grinding welds, or doing metal prep without dragging a cord. On paper they look nearly identical. In use, the differences come down to switch style, braking, electronics, and which battery platform you already own.

As an Amazon Associate we earn from qualifying purchases at no extra cost to you.

#1 Pick

DEWALT 20V MAX* XR Battery, 4.0-Ah, 2-Pack (DCB204-2), Black

Check Price on Amazon →

#2 Pick

DEWALT FLEXVOLT 20V/60V MAX Lithium-Ion 9.0Ah Battery DCB609

Check Price on Amazon →

Specs at a Glance

Both are mid-size grinders rated for 4-1/2″ wheels, but the Makita accepts 5″ wheels with the correct guard, which matters if you want a little more depth of cut. The DeWalt is 4-1/2″ only.

Both include tool-free guard adjustment and a two-position side handle. Neither comes with a battery or charger if you buy the bare tool (Z suffix on Makita, B suffix on DeWalt).

Power and Real Cutting Performance

On a fresh 5.0Ah battery, both grinders will cut 1/4″ mild steel plate and #4 rebar without bogging. The DeWalt’s 500-watt equivalent motor spins a bit faster at 9,000 RPM, so it feels slightly more aggressive on thin cutoff work with a 0.045″ wheel. The Makita counters with Automatic Speed Change Technology, which drops speed and increases torque under load instead of just trying to hold max RPM. In practice that means the Makita is less likely to stall when you lean into a grind with a flap disc or push a 5″ wheel through angle iron.

Runtime is close. Expect 20-30 cuts in 1/2″ EMT or 10-15 feet of grinding on a weld bead per 5.0Ah charge. Pushing either hard on 1/4″ steel with a 6.0Ah battery, you’ll get about 8-10 minutes of continuous trigger time before thermal protection kicks in. Neither will replace a 13-amp corded grinder for all-day grinding – the gearbox gets hot after about 5 minutes of continuous heavy grinding and the electronics will throttle power to protect the tool.

If you plan to run cutoff wheels for angle grinder work all day, the corded tool is still the honest answer. For everything else – quick cuts, notching, rust removal – both of these are more than capable.

Ergonomics and Control

Both use a two-stage paddle switch that requires you to hold the paddle to run. That is the safer design for a grinder and is now required on many job sites. The DeWalt DCG413 paddle is long and sits flush with the housing. It is easy to feather but can be tiring if you have small hands because you need to keep your whole palm engaged. The Makita XAG09 paddle is slightly shorter with a more pronounced lock-off lever. Gloved operation is easier on the Makita.

Grip circumference on the DeWalt is 7.9″ around the motor housing, Makita is about 8.2″. The difference is small, but the DeWalt feels slimmer. Vibration is well-controlled on both due to brushless motors, but the Makita rubber overmold is softer and damps a bit better during extended grinding. Neither has an anti-vibration side handle – that only shows up on higher-end models like the DCG418 or Makita XAG26.

Guard removal and wheel changes are tool-free on both, but Makita’s guard locks more positively. The DeWalt guard on early production units could rotate if you bumped it hard. That was revised, but check yours before you cut overhead.

Safety Electronics

This is where these grinders separate from cheap brushless models. Both have an electronic brake that stops the wheel in under 2 seconds. Both have kickback mitigation: DeWalt calls it E-Clutch, Makita calls it AFT. If the wheel binds, the tool shuts off instead of wrenching your wrist.

In testing, DeWalt’s E-Clutch trips a little earlier, which is good for bind-ups in cut-off work but can be annoying when you are aggressively grinding and momentarily jam an edge. Makita’s AFT allows slightly more load before it cuts, and its soft-start is smoother. Neither system replaces technique – you still need to cut so the wheel doesn’t pinch, and you still need to let the brake do its job instead of setting the grinder down while the wheel is still spinning.

Failure mode to watch: dust ingress into the paddle switch. Both switches will start to stick or need a firmer pull after 6-12 months of heavy masonry dust exposure. Blow out the housing with compressed air and avoid using the grinder as a dust blower. Brushless motors themselves rarely fail; the switch and the controller board are what die first.

Battery Platform and Ecosystem

Buy the grinder that matches the batteries you already own. That sounds obvious, but it is the single biggest cost factor. A bare tool is $149-$179. A kit with a 5.0Ah battery and charger pushes $249-$299. If you are cross-shopping, add up the real cost: two 5.0Ah batteries and a fast charger.

DeWalt 20V MAX batteries are widely available and the newer PowerStack and FlexVolt Advantage packs add a bit more runtime. Makita 18V LXT has the broadest 18V lineup in the industry and the 5.0Ah BL1850B packs are durable, but Makita is splitting focus with its 40V XGT line now. If you are already buying into 18V LXT for drills and impacts, the XAG09 makes sense to stay in the system. If you are on DeWalt 20V for everything else, the DCG413 avoids carrying two chargers.

For anyone starting from zero, compare the price of a Makita 18V grinder kit versus a DeWalt 20V MAX grinder kit with two batteries before you pick. The tool performance delta is smaller than the battery cost delta.

Durability and Service

Both use a sealed brushless motor and a metal gear head. Gearbox noise should be a steady whine. If you hear a rattling or clicking at startup, the pinion bearing is going – common after dropping the grinder or after prolonged heavy side-load from grinding. Replacement gear heads are available for both brands, but DeWalt service centers are more common in North America if you need warranty work.

Dust sealing favors Makita slightly. The XAG09 has a more labyrinthine air path and a removable dust mesh you can clean. The DCG413 relies on epoxy-coated windings and mesh screens but pulls air straight through the motor. In concrete cutting, the Makita stays cooler longer before it hits thermal shutdown.

Spindle lock buttons on both will round off if you change wheels with the battery still in and the spindle is spinning. Always remove the battery before a wheel change and use the correct thin wrench if the button is worn.

Which Should You Buy?

Choose the DeWalt DCG413 if you want the highest no-load speed, a slimmer body, and you are already on 20V MAX. It cuts a touch faster on thin metal, the brake is aggressive, and the paddle is comfortable for long, light cuts. It is also often $10-$30 cheaper as a bare tool.

Choose the Makita XAG09 if you want 5″ wheel capacity, slightly better dust protection, and smoother electronics under heavy load. The 5″ option gives you about 1/2″ more cutting depth, which helps when you need to cut through 1-1/2″ strut or 2″ pipe in one pass. It also pairs well if you already own Makita LXT tools.

If you only need a grinder for occasional homeowner use – cutting a few bolts, sharpening mower blades, removing rust – either is more grinder than you need. A cheaper brushless 18V grinder without a brake will do the job, just budget for better PPE and accept slower stops. For daily trade use where you are making money with the tool, the brake and anti-kickback on both of these models are worth the extra $40 over the bare-bones versions.