DEWALT 20V MAX XR 5-Inch vs DEWALT 20V 4-1/2-Inch Slide-Switch Grinder: Spec Comparison

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You are comparing the dewalt 20v max xr 5 inch vs 20v 4 1 2 inch slide switch grinder. Both are 20V MAX* brushless cordless grinders from DEWALT. They share a focus on professional performance and tool-only configurations. The main difference lies in their grinding capacity and control features. One model supports larger wheels and includes advanced anti-rotation technology, while the other offers a slide switch and a dedicated kickback brake system. You should review the specific specs below to decide which fits your workflow.

Wheel Diameter

4-1/2-5 in.

4-1/2-Inch

Switch Type

Not listed

Slide Switch

Safety Features

Anti-rotation system

Kickback Brake

Maximum Speed

9,000 RPM

Not listed

Weight

4.59 pounds

3.75 pounds

Smart Features

TOOL CONNECT Chip ready

Power Loss Reset

Choose the first if

• You need to grind or cut with 5-inch discs for larger projects.
• You want wireless tool control when paired with a compatible dust extractor.
• You prefer a tool that tracks asset management via the TOOL CONNECT app.

Choose the second if

• You prefer a slide switch for precise, momentary activation control.
• You prioritize a lighter tool that weighs under 4 pounds.
• You want a dedicated kickback brake that stops the wheel in two seconds or less.

Verdict

Choose the 5-inch model if you need versatility for larger discs and smart tracking features. Select the slide-switch model if you prefer lighter weight and immediate mechanical control via the switch. Both tools deliver brushless performance suitable for professional use.

Specs and Features Comparison

Wheel diameter range

Edge: DEWALT 20V MAX XR 5-Inch Brushless Angle Grinder

Product A, the DEWALT 20V MAX XR 5-Inch Brushless Angle Grinder, supports a wider range of wheel sizes. Its specifications list a wheel diameter of 4-1/2 to 5 inches. This allows you to use both smaller 4-1/2-inch discs and larger 5-inch discs for various tasks. Product B, the DEWALT 20V 4-1/2-Inch Slide-Switch Grinder, is limited to a 4-1/2-inch wheel diameter. If you frequently work with larger cutting or grinding discs, Product A offers more flexibility. Product B is strictly for the smaller standard size. This difference in compatibility affects which accessories you can use without adapters.

Weight and portability

Edge: DEWALT 20V 4-1/2-Inch Slide-Switch Grinder

Product B is lighter than Product A. Product B weighs 3.75 pounds. Product A weighs 4.59 pounds. The difference is 0.84 pounds. For extended overhead work or repetitive grinding, the lighter weight of Product B may reduce fatigue in your arm and shoulder. Product A is slightly heavier, likely due to its larger motor housing and anti-rotation system components. If you carry your tool in a bag all day, Product B offers a slight advantage in comfort. However, the weight difference is small and may not be noticeable during short tasks.

Maximum speed

Edge: DEWALT 20V MAX XR 5-Inch Brushless Angle Grinder

Product A has a higher maximum no-load speed. It reaches up to 9,000 RPM. The data for Product B does not list a specific maximum speed value. Generally, higher RPM allows for faster material removal and quicker cuts. If Product B has a lower or unspecified speed, Product A may complete grinding tasks more efficiently. You should check the full manual for Product B to confirm its exact speed. However, based on available data, Product A offers superior speed performance for tough jobs.

Braking and safety systems

Edge: Tie

Product B includes a Kickback Brake. This system engages when a pinch, stall, or bind-up event is sensed. It uses an electronic brake to stop the wheel quickly, reducing movement and shutting off the grinder. Product A features an anti-rotation system that senses excessive rotational motion and shuts the tool down. Both systems enhance safety. Product B focuses on stopping the wheel after a bind. Product A focuses on preventing excessive rotation. Product A also mentions a wireless tool control system for dust extractors. Product B does not list this feature. Both offer robust safety, but they function differently.

Switch type and control

Edge: DEWALT 20V 4-1/2-Inch Slide-Switch Grinder

Product B uses a slide switch. This type of switch is often preferred by professionals for one-handed operation and consistent activation. Product A does not specify its switch type in the provided key specs, though it mentions wireless control capabilities. The slide switch on Product B provides a tactile and reliable method for turning the tool on and off. If you prefer a physical slide mechanism over a trigger, Product B is the better choice. The switch type affects how you handle the tool during precise cuts.

Dimensions and size

Edge: DEWALT 20V 4-1/2-Inch Slide-Switch Grinder

Product A is slightly larger in length and width. Product A measures 13.1 inches in length and 6.2 inches in width. Product B measures 12.9 inches in length and 1 inch in width. The width difference is significant. Product B is much narrower, which may fit better in tight spaces. Product A is wider, potentially offering better balance for larger discs. If you work in confined areas, Product B’s narrow profile is advantageous. For general use, the size difference is minor. Both tools are designed for professional use.

Which grinder fits your workflow

Users needing versatile wheel sizes

Our pick: DEWALT 20V MAX XR 5-Inch Brushless Angle Grinder

Product A supports both 4-1/2 and 5-inch wheels. This flexibility lets you switch between standard discs and larger cutting wheels without changing tools. The 9,000 RPM speed and 1,590 MWO motor deliver strong performance for varied tasks. Its anti-rotation system adds control during heavy use.

Professionals prioritizing safety features

Our pick: DEWALT 20V 4-1/2-Inch Slide-Switch Grinder

Product B includes a Kickback Brake that engages in 2 seconds or less. It stops the wheel quickly during pinch or bind events. The Power Loss Reset prevents accidental restarts after power disruptions. These electronic safety systems provide added protection during demanding grinding operations.

Those seeking lighter equipment

Our pick: DEWALT 20V 4-1/2-Inch Slide-Switch Grinder

Product B weighs 3.75 pounds, making it lighter than Product A. The reduced weight helps reduce fatigue during extended overhead or prolonged use. Its compact 12.9-inch length also aids maneuverability in tight spaces. The slide switch offers a simple, direct control method for precise operation.

Specifications side by side

Spec	DEWALT 20V MAX XR 5-Inch Brushless Angle Grinder	DEWALT 20V 4-1/2-Inch Slide-Switch Grinder
Wheel Diameter	4-1/2-5 in.	4-1/2-Inch
Voltage	20V MAX*	20V MAX*
Maximum Speed	9,000 RPM	–
Motor Type	Brushless	Brushless
Switch Type	–	Slide Switch
Braking System	–	Kickback Brake
Configuration	Tool Only	Tool Only
Chuck Size	–	1/2 Inch
Included Tools	Grinder	Grinder
Power Source	Cordless	–
Set Type	Tool Only	Tool Only
Dimensions	13.1 × 6.2 × 4.9 inches	12.9 × 1 × 4.9 inches
Weight	4.59 pounds	3.75 pounds
Size	Standard	One Size
Color	Black, Yellow	Multi
Model	DCG410B	DCG405B

Frequently asked questions

Which grinder is lighter for overhead work?

The DEWALT 20V 4-1/2-Inch Slide-Switch Grinder is lighter. It weighs 3.75 pounds, which is less than the 4.59-pound weight of the 5-Inch XR model. This reduced mass helps reduce fatigue during prolonged use. The smaller dimensions also make it easier to maneuver in tight spaces.

Does the 5-inch model accept smaller discs?

Yes, the DEWALT 20V MAX XR 5-Inch Grinder accepts smaller discs. Its specifications indicate it supports a wheel diameter range of 4-1/2 to 5 inches. This means you can use standard 4-1/2-inch grinding wheels on this tool without needing a separate device for smaller tasks.

Are both grinders brushless for better efficiency?

Yes, both tools feature brushless motors. The 5-Inch XR model is described as brushless in its attributes. The 4-1/2-Inch Slide-Switch model also uses a brushless motor, as noted in its verdict. This shared technology provides longer motor life and increased efficiency for both users.

What is the main size difference between them?

The primary difference is the maximum wheel diameter. The XR model supports up to 5-inch wheels, while the slide-switch version is limited to 4-1/2-inch wheels. This affects the types of cutting and grinding operations you can perform, with the larger model offering more versatility for bigger discs.

Which tool has a slide switch mechanism?

The DEWALT 20V 4-1/2-Inch Grinder features a slide-switch mechanism. Its name explicitly identifies it as a Slide-Switch Grinder. The 5-Inch XR model does not have this specific switch type listed in its attributes, making the 4-1/2-inch version distinct in its activation method.

Is the 5-inch model bare tool only?

Yes, the DEWALT 20V MAX XR 5-Inch Grinder is a bare tool. Its attributes list the configuration as Bare Tool and the set type as Tool Only. This means you must purchase batteries and a charger separately to operate it, similar to the 4-1/2-inch slide-switch model.

How do the dimensions compare for storage?

The 4-1/2-Inch model is slightly more compact. It measures 12.9 inches in length and 4.9 inches in height. The 5-Inch XR model is longer at 13.1 inches and slightly wider at 6.2 inches. These small differences may influence how easily each tool fits into your existing tool storage.

See also

• best DEWALT angle grinders under 200
• DEWALT vs makita angle grinder
• dewalt 20v max 4 1 2 inch brushless vs 13 amp 4 1 2 to 5 inch
• dewalt 20v max xr jig vs 7 1 4 inch circular saw