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The DEWALT DCG407B 20V MAX brushless angle grinder delivers up to 9,000 RPM, anti-rotation protection, and tool-free guard adjustment in a lightweight 3.55-lb package.
Categories : tools
SKU : WOR-TOO-1016
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The DEWALT DCG407B 20V MAX Cordless 4-1/2-Inch Slide-Switch Angle Grinder is built for cutting and grinding jobs where you need power and control without the cord. This bare tool runs on the DEWALT 20V MAX battery platform (batteries and charger sold separately) and uses a brushless motor that maintains constant speed under load while delivering up to 850 MWO and 9,000 RPM. If you already own DEWALT 20V MAX tools, adding the DCG407B is a natural fit.
This grinder is equipped with two ANTI-ROTATION features: Kickback Brake and E-Clutch. Kickback Brake shuts the motor down quickly if the tool detects a pinch or stall, and E-Clutch disengages the accessory to help prevent the grinder from rotating in your hands. Together, they give you an extra layer of protection during tough cuts.
The DCG407B comes with both Type A and Type B guards, and adjusting the guard is fast. Use the tool-less guard lever to rotate the guard to the position you need for comfortable visibility and debris deflection. To remove the guard, release the clamp and slide it away from the spindle flange. Always make sure the grinder is unplugged or the battery is removed before changing guards or accessories. This simple routine lets you switch between cutting and grinding quickly.
At only 3.55 lbs (bare tool), the DCG407B reduces fatigue during extended sessions. The slide switch is easy to operate while holding the grinder with one hand, and the compact body lets you work in tight spaces. It accepts 4-inch to 5-inch wheels, so you can use a range of cut-off and grinding discs.
If you need a cordless grinder that keeps up with demanding jobs and want the latest brushless technology and safety features, the DCG407B is a strong choice. For users already on the DEWALT 20V MAX system, it's an unbeatable way to add grinding capability. If you prefer a tool with a lock-on switch, consider another model; the DCG407B uses a slide switch that stays on while manually held in position.
Brushless motor delivers up to 850 MWO and 9,000 RPM for demanding work
Kickback Brake and E-Clutch help keep the grinder under control
Tool-free guard adjustment with Type A and Type B guards included
Lightweight 3.55-lb design reduces fatigue
Accepts 4"–5" wheels for versatile cutting and grinding
Model: DCG407B
Motor: Brushless
Weight: 3.55 lbs / 1.61 kg
Power Source: 20V MAX battery (bare tool, battery not included)
Product Type: Cordless Angle Grinder
No-Load Speed: 9,000 RPM
Guard Included: Type A and Type B guards
Wheel Capacity: 4"–5" (10–13 cm)
Safety Features: Kickback Brake, E-Clutch
Max Power Output: 850 MWO
Seller: Workbench World
MPN: DCG407B
A grinder is only as useful as your ability to set it up safely and efficiently. The DEWALT DCG407B is designed to keep you working, with features that make it easy to switch guards and keep the tool in tune.
Changing the guard position on the DCG407B takes seconds. Flip the lever, twist the guard to where you need it, and lock it back down. This lets you optimize visibility for feathering welds on one side or heavy stock removal on the other.
Kickback Brake shuts the motor down on a stall, while E-Clutch instantly disengages the drive if the wheel catches. The result is less reactive torque in your hands. These features are not just marketing; they're practical tools for reducing the risk of injury on unpredictable cuts.
Type A and Type B guards are included with the DCG407B. Use the Type A guard for grinding and the Type B guard for cutting. If you ever need a replacement, make sure it's a DEWALT guard designed for the DCG407B; aftermarket guards may not fit or protect properly.
The brushless motor is efficient, but grinding is hard work. For long cut-off sessions, grab a 6Ah or higher battery. Keep a spare charged and you won't have to stop in the middle of a job.
Loosen the guard lever, rotate the guard to your preferred position, and re-tighten the lever. To remove the guard, release the clamp and pull it off the spindle flange. Always remove the battery before doing this.
Any DEWALT 20V MAX battery will work. For best performance, use 5Ah or higher-capacity batteries, especially for longer cuts.
Yes, the guard and spindle are designed to accept 4-inch to 5-inch wheels. Make sure the disc rating matches the grinder's max RPM.
Yes, the DCG407B is a bare tool. Battery and charger are sold separately.
Type A is a standard guard suitable for many grinding and cutting tasks. Type B is a deeper guard designed for cut-off wheels. Using the correct guard improves safety and debris control.
Powerful and light.
I use this for cutting metal and it's smooth. The slide switch is easy to use with gloves.
This grinder is a beast. It cuts through rebar like butter. The anti-rotation feature is reassuring. The tool-free guard adjustment is convenient. It's lighter than my old corded grinder. Battery life drains fairly quickly at max speed, but I have several batteries. Overall, a great tool for the money.
Good grinder, but the vibration is noticeable after prolonged use. I use it for small jobs. The safety switch is a bit stiff.
I love that it's brushless and quiet. It fits my small hands.
The grinder works well for my shop. The guard adjusts without tools, which is great. The only issue is that the battery doesn't last as long as I'd like. It's still a solid performer.
It's a decent grinder, but the slide switch sticks a bit. I prefer paddle switches.
Perfect for grinding welds.
I'm not a professional, but I do some metalwork as a hobby. This grinder is easy to control. The 9,000 RPM is plenty for my projects. The tool-free guard is a nice touch. It's a bit heavy after a while, but I'm also not used to it.
Great grinder, arrived fast. The case is sturdy. I've used it every day for a week and no issues.
I've been using grinders for 40 years. This one is the best cordless I've tried. The power is comparable to my corded. The only drawback is the price, but it's worth it.
I bought this for my husband and he loves it. Says it's smooth and easy to handle.
