Dewalt DCG407B 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder, Tool Only

The DEWALT DCG407B 20V MAX Brushless Cordless 4-1/2″ Slide-Switch Grinder is built for grinding, cutting, and material removal tasks where cordless mobility and steady performance are important. Designed to handle 4-1/2″ wheels and accept common 4″ to 5″ wheel sizes, this grinder is well suited for metalworking, construction, maintenance, and repair work. Its brushless motor is engineered to maintain constant speed under load, helping users stay productive during tougher grinding applications while also reducing maintenance because there are no brushes to replace. With output rated up to 850 MWO and a no-load speed of up to 9,000 RPM, this cordless grinder is designed for everyday professional use on active jobsites and in demanding shop environments.

As part of the DEWALT PERFORM & PROTECT lineup, the DCG407B includes safety-focused anti-rotation features such as Kickback Brake and E-Clutch. These systems are designed to help improve control during bind-up or stall events, making the tool a practical choice for crews working in fast-paced or repetitive grinding applications. The slide-switch design supports continual operation over longer periods, while overload protection helps protect the tool during demanding tasks. Mesh screens help block debris from entering internal components, supporting durability on dusty jobsites. With included grinding and cutting guard components, this tool is ready for a range of common angle grinder applications for contractors, fabricators, mechanics, and advanced home workshop users. Battery and charger are sold separately.

Dewalt 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder At a Glance

• Brushless Motor: Maintains constant speed under load and eliminates brush changes.
• 850 MWO Output: Delivers the power needed for demanding grinding and cutting work.
• 9,000 RPM No-Load Speed: Supports fast material removal and efficient surface preparation.
• Kickback Brake and E-Clutch: Anti-rotation features help improve control during bind-up events.
• Slide Switch Operation: Allows continual use during longer grinding or cutting tasks.
• Overload Protection: Helps protect the grinder during tough applications.
• Mesh Debris Screens: Helps reduce internal damage from dust and debris.
• 4″ to 5″ Wheel Acceptance: Accommodates common regional wheel size requirements.

Markets

• Construction and Renovation: Used for cutting metal, grinding welds, and preparing surfaces on the jobsite.
• Metal Fabrication: Ideal for weld cleanup, edge grinding, and general steel preparation in fabrication shops.
• Automotive Repair: Useful for removing rust, cutting hardware, and grinding metal components during repair work.
• Facility Maintenance: Supports repair crews handling handrails, brackets, fasteners, and mechanical equipment.
• Municipal Workers: Practical for public works departments maintaining fences, metal fixtures, and site equipment.
• Trade Schools and Educational Institutions: Suitable for hands-on training in grinding, cutting, and tool safety practices.
• Advanced DIY and Home Workshops: A dependable cordless grinder for repair, restoration, and fabrication projects at home.

Contractors and fabrication crews benefit from a cordless angle grinder that combines jobsite mobility with strong day-to-day performance. The DEWALT DCG407B gives users the ability to move between cutting and grinding tasks without relying on cords, which is especially useful on ladders, in service vehicles, or on active renovation sites. The brushless motor helps maintain working speed under load, making it a practical option for repeated grinding passes, weld cleanup, and cutting common steel materials.

Maintenance departments, municipal crews, and repair technicians also benefit from its built-in safety and durability features. Kickback Brake, E-Clutch, and overload protection support better control during demanding work, while mesh screens help the grinder hold up better in dusty environments. For schools, workshops, and experienced home users, this cordless grinder offers a professional-level tool for common metalworking and repair applications without the extra maintenance of a brushed motor.

Dewalt DCG407B 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder, Tool Only Features

• Constant Speed Under Load: Brushless motor helps maintain performance during demanding grinding applications.
• Brushless Motor Design: Minimizes maintenance by eliminating brush changes.
• Kickback Brake: Helps stop the wheel quickly during bind-up or pinch events.
• E-Clutch System: Anti-rotation feature designed to improve user control in stall conditions.
• Up to 850 MWO: Provides strong output for tough cutting and grinding tasks.
• 9,000 RPM No-Load Speed: Supports efficient grinding, cutting, and surface prep.
• Overload Protection: Helps protect the tool in heavy-use applications.
• Slide-Switch Operation: Allows continual operation during longer work periods.
• Mesh Screens: Helps prevent damaging debris from entering internal components.
• 4″ to 5″ Wheel Acceptance: Handles common wheel sizes used in many markets.
• QUICK-CHANGE™ Guard Removal: Tool-free guard changes help save time between tasks.
• Grinding and Cutting Capability: Includes guard components for both grinding and cutting setups.

Dewalt DCG407B 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder, Tool Only Includes

• (1) DCG407B 4-1/2″ Slide-Switch Grinder
• (1) Side Handle
• (1) Clip-On Guard
• (1) Type B Guard
• (1) Inner Flange
• (1) Outer Flange
• (1) Hex Wrench

Dewalt DCG407B 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder, Tool Only Specifications

• Brand: DEWALT
• Model: DCG407B
• Product Type: Cordless Angle Grinder
• Power Source: Cordless
• Battery Platform: DEWALT 20V MAX
• Battery Type: 20V MAX Lithium-Ion
• Battery Included: No
• Charger Included: No
• Battery/Charger: Tool Only
• Motor Type: Brushless
• Wheel Size: 4-1/2″
• Wheel Acceptance: 4″ to 5″
• Maximum Speed: 9,000 RPM
• Power Output: Up to 850 MWO
• Run Time: Up to 56 cuts of 1/2″ rebar
• Switch Type: Slide Switch
• Brake System: Kickback Brake
• Clutch System: E-Clutch
• Overload Protection: Yes
• Guard Change System: QUICK-CHANGE™ Tool-Free Guard Removal
• Assembled Length: 12.0″
• Assembled Width: 6.5″
• Assembled Height: 4.8″
• Assembled Weight: 4.572 lbs
• Packaged Length: 13.0″
• Packaged Width: 6.75″
• Packaged Height: 4.9″
• Packaged Weight: 4.872 lbs
• Number of Speeds: (1)

Dewalt DCG407B 20V MAX Brushless Cordless 4 1/2″ Slide-Switch Grinder, Tool Only Warranty

• Dewalt’s Guarnateed Tough 3 Year Limited Warranty, 1 Year Free Service, 90 Days Satisfaction Guaranteed

Why Customers Choose the Dewalt 20V MAX Brushless Cordless 4-1/2″ Angle Grinder with Slide Switch

Contractors, fabricators, and repair technicians choose the DEWALT DCG407B because it delivers the flexibility of a cordless grinder with the power needed for everyday grinding and cutting work. The brushless motor helps maintain speed under load, which is important when cleaning welds, cutting rebar, or removing rust and scale from metal surfaces. With up to 850 MWO and 9,000 RPM, this 20V MAX grinder is built to handle common jobsite and shop applications without the inconvenience of a cord. The slide-switch design also makes it better suited for longer passes and repeated material removal.

Users also choose this 4-1/2″ angle grinder because its safety and durability features support real working conditions. Kickback Brake and E-Clutch help improve control when the wheel binds, while overload protection helps protect the tool during harder use. Mesh screens help block debris in dusty environments, making this cordless angle grinder a practical option for construction, metal fabrication, facility maintenance, and automotive repair.