DeWalt 20 Volt Grinders: Which Cordless Model to Buy
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DeWalt’s 20V MAX battery system is one of the most common in garages and job sites, and its cordless angle grinders are a natural next tool once you own a drill from the same family. An angle grinder spins a flat abrasive disc at high speed to cut metal, grind down welds, remove rust or sand with a flap disc. DeWalt’s grinders stand out for their safety systems, which matter because a grinder can jerk suddenly if the wheel catches.
The six options below include four DeWalt-made models, from a compact 4-1/2 inch tool to the powerful XR line with and without a battery, plus two lower-cost grinders made by other companies that are designed to fit DeWalt 20V batteries.
DeWalt 20V Angle Grinders Compared
| Model | Made by | Wheel size | Max speed (no load) | Battery included |
|---|---|---|---|---|
| DCG413B | DeWalt | 4-1/2 in | Listed as 3,450 rpm | No |
| DCG408B | DeWalt | 4 to 5 in | 9,000 rpm | No |
| DCG410B | DeWalt | 4-1/2 to 5 in | 9,000 rpm | No |
| Grinder for DeWalt 20V (Musotica) | Musotica | 4-1/2 in | 8,500 rpm | No |
| ML-A005 for DeWalt 20V (AIDERAR) | AIDERAR | 4-1/2 in | 7,200 rpm | No |
| DCG410WW1 Kit | DeWalt | 4-1/2 to 5 in | 9,000 rpm | Yes, XR POWERPACK |
Two terms appear again and again below. A paddle switch is a long lever under the grinder’s body that you squeeze to run the tool and simply let go to stop it, which many beginners find safer than a slide switch because the tool stops the moment your hand relaxes. A kickback brake senses when the wheel pinches or binds, then stops it hard and shuts the tool off, reducing the sudden twist that can pull the grinder out of your hands. MWO, which you will see on DeWalt listings, stands for max watts out, DeWalt’s measure of motor output.
DEWALT 20V MAX Angle Grinder DCG413B for Safety-First Beginners
Dewalt
DEWALT 20V MAX XR Brushless Cordless 4-1/2 in. – 5 in. Angle Grinder Kit with XR POWERPACK (DCG410WW1)
Price and specifications are read from the Amazon product page and can change.
DEWALT 20V MAX XR Brushless Cordless
Best for: New owners needing grinder and battery
Pros
- XR POWERPACK battery included
- Up to 1,590 MWO and 9,000 RPM
- Anti-rotation system
Cons
- Heaviest at 10.3 lbs listed
- Charger not mentioned
Best for: DIYers wanting a paddle switch
Pros
- Paddle-switch operation
- Up to 9,000 RPM, 850 MWO
- Type A and B guards
- Kickback Brake and E-Clutch
Cons
- Weight listed two ways
- Battery sold separately
The DEWALT 20V MAX* Angle Grinder Tool (DCG413B) is a compact brushless 4-1/2 inch grinder sold as the bare tool. Its brushless motor needs no brush changes, and its electronic brake stops the wheel in two seconds or less on average. The Kickback Brake engages at maximum force during a pinch, stall or bind-up and turns the tool off. E-Switch Protection adds a no-volt release: if the tool loses power unexpectedly, you have to switch it off and on again before it restarts, so it cannot surprise you by springing back to life.
There are some inconsistencies worth knowing. The title mentions a paddle switch, but the feature list describes a two-stage trigger that needs two actions to start. The specifications list 20 watts, 0.16 horsepower, 3,450 rpm and a 16-ounce weight, which do not fit a grinder of this size, so treat those figures with caution and check the product page. Dimensions are listed as 12.2 x 4.7 x 6 inches. Battery and charger are sold separately.
This suits a first-time grinder owner who already has a DeWalt 20V battery and wants the most clearly explained safety features. If you want published power figures you can trust, the DCG408B below gives clearer numbers.
DEWALT DCG408B Paddle-Switch Grinder for Everyday Metal Jobs
The DEWALT 20V MAX Cordless 4 1/2 Inch Paddle-Switch Grinder (DCG408B) is a brushless bare tool with paddle-switch operation. DeWalt rates it at up to 850 MWO and 9,000 RPM with no load, and claims up to 56 cuts of 1/2-inch rebar per charge, though the listing does not say which battery that figure uses. It maintains constant speed under load and has overload protection.
Safety features include a Kickback Brake and E-Clutch, which DeWalt groups as anti-rotation features. It takes 4 to 5 inch wheels and comes with both Type A and Type B guards, and mesh screens help keep debris out of the motor. The listing gives two weights, 3.55 pounds bare in the features and 4.8 pounds in the specifications.
This is a well-rounded choice for home metalwork, rust removal and cutting bolts. If you need more power for thick steel, the DCG410B steps up to 1,590 MWO. To see what else runs on the same battery, our DeWalt 20 volt guide covers the wider lineup.
DEWALT 20V MAX XR DCG410B for Maximum Power
The DEWALT 20V MAX* XR Brushless Cordless angle grinder (DCG410B) belongs to what DeWalt calls its most powerful line of 20V MAX grinders. Its brushless motor delivers up to 1,590 MWO and 9,000 RPM with no load, and it accepts 4-1/2 to 5 inch wheels. The listing gives a horsepower figure of 1 hp and a weight of 4.6 pounds.
The anti-rotation system senses when the tool itself starts to twist too much and shuts it down. It is also ready for DeWalt’s Tool Connect chip (sold separately) for tracking tools in an app, and it can switch a compatible DeWalt dust extractor on and off wirelessly. The listing does not say whether it uses a paddle or slide switch. Battery and charger are sold separately.
This suits someone doing frequent heavy cutting or grinding who already has DeWalt batteries. If you need a battery too, the DCG410WW1 kit is the same grinder with an XR POWERPACK included.
Musotica Angle Grinder for DeWalt 20V Batteries as a Budget Option
The Angle Grinder Cordless for Dewalt 20V batteries is made by Musotica, not DeWalt. It is a third-party tool designed to accept DeWalt 20V Max batteries, and the listing names DCB200, DCB201, DCB205, DCB206 and DCB208 packs as compatible. Because DeWalt does not make it, DeWalt’s safety systems and warranty do not apply, so read its own listing carefully.
It has a brushless motor with three speed settings from 3,000 to 8,500 RPM, a 4-1/2 inch wheel size, and left and right positions for the anti-slip side handle. It includes a spark guard and describes a 3D ventilation system for cooling. The listing does not mention a kickback brake, a paddle switch, a weight or a warranty term. It is tool only.
It could suit someone who owns DeWalt batteries and needs an occasional grinder for rust removal or light cutting. For better-documented protection, the DeWalt DCG408B is the safer beginner pick.
AIDERAR 4-1/2 Inch Grinder for DeWalt 20V Batteries for Light DIY
The 4-1/2″ Cordless Angle Grinder Tool for DeWalt 20V Max (model ML-A005) is made by AIDERAR, another third-party brand. It fits DeWalt 20V MAX batteries but, per the listing, is not compatible with DCB6XX (20V/60V MAX) batteries. Battery and charger are not included.
It has a brushless motor, three speeds up to 7,200 RPM, and two metal guards: a full guard for grinding and sanding discs and a half guard for cutting wheels. A trigger switch must be held to run, a lock-off button prevents accidental starts, and soft start eases the motor up to speed. The 5/8″-11 spindle fits most 4-1/2 inch accessories, and the listing states a 2-year warranty. No kickback brake is mentioned.
It suits light home repairs and small metal projects. For heavier use, stick with a DeWalt model.
DEWALT DCG410WW1 XR Kit for Buyers Without a Battery
The DEWALT 20V MAX XR Brushless Cordless angle grinder kit (DCG410WW1) bundles the DCG410 grinder with an XR POWERPACK battery. The grinder matches the DCG410B: up to 1,590 MWO and 9,000 RPM, 4-1/2 to 5 inch wheels, the anti-rotation system, Tool Connect readiness and wireless dust extractor control.
The listing does not state the battery’s capacity or whether a charger is included, and it lists a kit weight of 10.3 pounds. Check the product page for the full box contents. It is a strong gift for someone starting fresh with DeWalt. Once you have the battery, it also powers other tools like the one in our DeWalt 20 volt drill guide.
How to Choose the Right DeWalt 20V Grinder
First, check your batteries. If you have none, the DCG410WW1 kit is the only option here with a battery. Everything else is tool only.
Second, match power to the job. Rust removal and occasional cutting are fine on the DCG413B or DCG408B. Frequent cutting of thick steel suits the DCG410B or DCG410WW1 at 1,590 MWO.
Third, look at safety. The DeWalt models list a Kickback Brake or anti-rotation system. The two third-party grinders do not list these, and they are not covered by DeWalt’s warranty.
Finally, choose a switch style. Paddle switches stop the tool when you let go; the DCG408B confirms paddle operation, while other listings are less clear.
FAQ
Do DeWalt 20V grinders come with a battery?
Only the DCG410WW1 kit includes a battery in this list. The rest are bare tools.
Are the third-party grinders made by DeWalt?
No. They are made by Musotica and AIDERAR and are designed to use DeWalt 20V batteries. DeWalt does not make or warranty them.
What size wheels do these grinders use?
All accept 4-1/2 inch wheels. The DCG408B, DCG410B and DCG410WW1 also take 5 inch wheels.
What is a kickback brake?
It stops the wheel quickly and shuts the tool off if the wheel pinches or binds, reducing sudden tool movement.
Which DeWalt grinder is best for a beginner?
The DCG408B offers a paddle switch, a Kickback Brake and E-Clutch, and clear power figures, making it an easy first choice for battery owners.
