1 / 6DEWALT DCG407B 20V MAX Brushless 4.5-Inch Angle Grinder
DEWALT DCG407B is a 20V MAX cordless brushless angle grinder with a slide switch and a bare-tool configuration. It is listed for 4.5-inch wheels, while the product description says it accommodates 4- to 5-inch wheels. Battery and charger are sold separately.
At a glance
- Brushless cordless grinder with slide-switch operation for continual use.
- Manufacturer describes a kickback brake and E-clutch as anti-rotation features.
- Product description claims constant speed under load and overload protection.
- Description says the grinder accommodates 4- to 5-inch wheels and includes Type A and Type B guards.
Reference price: $158.00
Price checked: Nov 13, 2026
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Pros and cons
Pros
- Bare-tool format can suit buyers who already use compatible 20V MAX batteries and a charger.
- Brushless motor, overload protection and mesh screens are specified in the product description.
- The claimed kickback brake and E-clutch add protective functions described for this tool.
Cons
- A battery and charger are sold separately, so buyers without compatible equipment need to obtain them separately.
Technical specifications
18 specifications| Brand | DEWALT |
|---|---|
| Model | DCG407B |
| Power configuration | Battery Powered |
|---|---|
| Voltage | 20 volts |
| Maximum rotational speed | 9000 rpm |
|---|---|
| Motor output claim | up to 850 MWO |
| No-load speed claim | up to 9,000 RPM (no load) |
| Wheel sizes described | 4 in. - 5 in. |
| Weight listed | 2.19 kg |
|---|---|
| Bare-tool weight claim | 3.55 LBs (Bare Tool) |
| Material listed | Blend |
|---|---|
| Protection features | overload protection and an efficient brushless motor |
| Debris protection | mesh screens that help prevent debris that can cause damage from entering internal components |
| Guards described | both Type A and Type B guards |
| Switch type | Slide-Switch |
|---|---|
| Motor type | brushless motor |
| Colour | Black, Yellow |
| Claimed cutting runtime | Up to 56 cuts of 1/2" rebar** |
|---|
What to know before buying
Listing details to confirm
The listing gives different weight figures: 2.19 kg in the details and 3.55 LBs for the bare tool. It also gives rotational speed as 9000 rpm and up to 9,000 RPM (no load), and describes the grinder as 4 1/2 inches in the title but says it accommodates 4- to 5-inch wheels. The 850 watts details field conflicts in wording and unit with the feature claim of up to 850 MWO. Confirm the relevant configuration and specifications before purchase. The rebar runtime claim includes ** without defining the condition or battery used.
What’s in the box
Included- 20V MAX BL 4.5IN ANGLE GRINDER
Who is it for?
A good fit for
- DEWALT 20V MAX users who already have a compatible battery and charger.
- Buyers looking for a cordless grinder with a slide switch and stated overload protection.
- Grinding or cutting jobs where the described 4- to 5-inch wheel range fits the intended accessory.
Less suited to
- Buyers who need a battery and charger included.
- Buyers requiring one unambiguous listed weight, wheel size or power figure without confirming the differing claims.
Customer reviews on Amazon
- 5 stars
67% 67% - 4 stars
18% 18% - 3 stars
5% 5% - 2 stars
6% 6% - 1 star
4% 4%
Aggregate ratings lean positive, with most ratings in the top category, but a smaller share are low ratings. Without customer comments, the figures do not show what buyers liked or disliked. They cannot establish how the grinder performs in practice or resolve the listing's differing weight, wheel-size and power descriptions.
Frequently asked questions
Does the DCG407B include a battery and charger?
No. The product description says the battery and charger are sold separately, and the title identifies this as a bare tool.
What wheel sizes does the listing describe?
The title calls it a 4 1/2-inch grinder, while the product description says it accommodates 4- to 5-inch wheels. Confirm fit for your intended wheel.
What speed is specified?
The listing gives 9000 rpm in the details and claims up to 9,000 RPM at no load in the feature text. These figures are presented with different wording.
What safety-related features are claimed?
The feature text identifies a kickback brake and E-clutch as anti-rotation features. The product description also mentions overload protection and Type A and Type B guards.
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