Description

Key Features

More Control Under Load

The DEWALT ANTI-ROTATION System is built to react when the wheel pinches, stalls, or binds up. That helps reduce reaction torque so the tool is easier to manage in real metal cutting work.

Stops Fast

The electronic brake stops the wheel in less than 1 second after you release the trigger. That cuts down wait time between cuts and helps you keep better control as the wheel winds down.

Compact Cut-Off Reach

The DeWALT DCG430B ATOMIC 20V MAX 3 in. Cut-Off Tool is built for straight, clean cuts in tight or narrow spaces where larger grinders and corded setups get in the way. You get cordless mobility without dragging around hoses or a compressor.

Overview

The DeWALT DCG430B ATOMIC 20V MAX 3 in. Cut-Off Tool is a cordless metal cutting tool built for clean, controlled cuts in tight spaces. This is a cut-off tool designed for metalworking and tight-space cutting. Model Number: DCG430B. If you need pneumatic-style access without hoses, this is the kind of tool that makes sense on service work, fab tables, and punch-list jobs where mobility matters.

What makes this tool different is how much DEWALT packed into a compact platform. It is rated to deliver 78% more power than 0.5 HP rated pneumatic 3 in. cut-off tools, which matters when you are cutting steel and do not want to drag a compressor behind you. DEWALT specifically calls out cutting 1/2 in. rolled steel, so this is not just a light-duty trim tool pretending to be a real jobsite cutter.

Control is a big part of the story here. The DEWALT ANTI-ROTATION System is built to sense a pinch, stall, or bind-up event and quickly stop the wheel to reduce reaction torque. On a compact, one-handed style tool like this, that is a feature that actually matters. Pair that with an electronic brake that stops the wheel in less than 1 second, and you get a cut-off tool that feels designed around real jobsite handling instead of just raw speed.

DEWALT also did the practical stuff right. The rotating guard has 11 positions so you can set spark direction and coverage for different cuts, and the tool-free adjustment range of up to plus or minus 75 degrees helps when the workpiece or your body position is awkward. That is a real benefit if you are working inside engine bays, around installed pipe, or up against panels where a larger grinder body would force an uncomfortable angle.

For daily use, the layout is geared toward speed and familiarity. The spindle lock simplifies wheel changes without juggling multiple wrenches. The lock-off paddle switch with no lock-on keeps the control scheme similar to what many users expect from pneumatic tools. DEWALT also added a forward exhaust system to help direct air away from the user and help prevent overheating from the motor.

This bare tool runs on the DEWALT 20V MAX battery platform and is also TOOL CONNECT CHIP READY, so users already invested in DEWALT batteries can drop it into the same cordless system. The optional Tool Connect chip and software can add jobsite tracking and data capability, which is useful for fleet management or larger crews trying to keep tabs on small high-value tools.

Who should buy it? This cut-off tool makes the most sense for metalworking, mechanical trades, electrical contractors, HVAC installers, plumbers, maintenance techs, and remodelers who need a small cordless cutter that can get into places a full-size grinder cannot. It is also a smart choice for anyone replacing a pneumatic 3 in. cut-off tool and wanting similar maneuverability without the hose.

Compact Size, Real Cutting Capability

This compact cut-off tool is built for the spots where a larger grinder is overkill or just plain awkward. It gives you the reach and mobility to make straight, clean cuts without dealing with cords, hoses, or compressor setup.

• 3 in. cut-off tool format for narrow spaces and tight access work
• Similar in-use weight to competitive pneumatic 3 in. cut-off tools
• Spindle lock helps speed up wheel changes on the job

What’s in the Box

• (1) DCG430 3 in. Cut-Off Tool
• (1) Diamond Multi-Material Wheel
• (1) Bonded Abrasive Cutting Wheel
• (1) Inner and Outer Flange Accessory
• (1) Bolt Wrench

Battery and charger sold separately.

Key Specifications

Voltage (V)	20 V
Power Source	Battery
Tool Type	Cut-Off Tool
Wheel Diameter	3 in.
Weight (lbs)	3.107 lbs
Brake Stop Time	Less than 1 second
Guard Positions	11
Tool-Free Rotation Adjustment	Up to plus or minus 75 degrees

Compatibility

Battery Platform

Part of the DEWALT 20V MAX system. Battery and charger are sold separately.

Tool Management

TOOL CONNECT CHIP READY. Can be paired with the Tool Connect Chip and Tool Connect software, both sold separately.

Built For

Metalworking HVAC Plumbing Electrical Automotive Maintenance Tight-space cutting Rolled steel cutting

Pro Tip

Before you start a cut in a tight corner, take a second to set the guard position and rotation angle first. The 11-position guard and up to plus or minus 75 degree tool-free adjustment make a big difference in keeping sparks off your hands and keeping the wheel where you can see it.

Warranty & Support

3 Year Limited Warranty, 1 Year Free Service, 90 Day Satisfaction Guaranteed.

Tool Nut’s Take

Tool Nut’s Take

DeWALT DCG430B ATOMIC 20V MAX 3 in. Cut-Off Tool for tight-access metal cutting

This is the kind of compact cordless cut-off tool that earns a spot in the truck because it solves a real problem: making controlled cuts where a bigger grinder or pneumatic setup is a hassle.

• Who it’s for: Pros and serious DIY users doing metal cutting, service work, pipe work, mechanical work, and repairs in tight spaces.
• Why it stands out: The combination of compact size, anti-rotation protection, sub-1-second brake stop, and 20V MAX cordless convenience makes it more than just a small grinder with a different wheel.
• Worth knowing: This is a bare tool, so you need your own 20V MAX battery and charger. If you already run DEWALT cordless, that is not much of a downside.

Common Questions

• Is this a cordless or corded cut-off tool? It is a cordless cut-off tool powered by a DEWALT 20V battery platform.
• Does this tool include a battery and charger? No. This is a tool-only version, and the battery and charger are sold separately.
• What safety and control features does it have? It includes the DEWALT ANTI-ROTATION System and an electronic brake that stops the wheel in less than 1 second.
• Can the guard be adjusted for different cutting angles? Yes. The rotating guard has 11 positions and offers tool-free rotation adjustments up to plus or minus 75 degrees.