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DCG402B

DEWALT® 20V MAX* ATOMIC™ 4-1/2-in. Angle Grinder (Tool Only)

A close-up view of a DEWALT cordless angle grinder with a black and yellow design. The tool features a textured side handle for grip and a battery compartment at the back.

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Product details

Complete high-powered applications in tight spaces using the ATOMIC™ 20V MAX* Die Grinder with Lanyard Ready™ Attachment Point (battery, charger, and lanyard sold separately). This tool is equipped with the DEWALT® ANTI-ROTATION System to help maximize control. This feature quickly stops the wheel when a pinch, stall, or bind-up event is sensed, reducing reactionary torque. An ergonomic design allows this tool to access ultra tight spaces. Featuring a Lanyard Ready™ Attachment Point, up to 445 MWO, and a maneuverable design, this grinder is ideal for working at height. Replace pneumatic die grinders with the ATOMIC™ 20V MAX* Die Grinder with Lanyard Ready™ Attachment Point that delivers untethered performance, productivity, and pneumatic-like power“ .

  • Help Maximize Control - Equipped with the DEWALT® ANTI-ROTATION System. This feature quickly stops the wheel when a pinch, stall, or bind-up event is sensed, reducing reactionary torque. The switch needs to be cycled (turned on and off) to restart the tool.
  • Electronic Brake - Help maintain control with the electronic brake designed to stop the wheel within 1.25 seconds** after the on/off trigger is released.
  • Ergonomic Design - Complete applications with a slim, ergonomic design that has a smaller gripping diameter“ “  for access into ultra tight spaces.
  • Fast Guard Changes - Quickly convert your standard Type B guard into a Type A guard with a clip on guard.
  • Easy Wheel Changes - Change wheels quickly with the spindle lock, removing the need for multiple wrenches.
  • Brushless Motor Performance - Take on demanding applications with up to 760 MWO and 11,000 RPM (no-load).
  • Paddle Switch - Designed with lock off paddle and no-lock on feature.
  • Forward Exhaust System - Direct air away from the user with an exhaust system that helps prevent overheating from the motor.
  • TOOL CONNECT™ CHIP READY™ - Pair the TOOL CONNECT™ Chip (sold separately) and DEWALT® TOOL CONNECT™ app“¡ for data on jobsite asset management and tool location.
  • Where Size Meets Power™ - ATOMIC™ power tools are part of the expanding DEWALT® 20V MAX* system, offering size without compromise.

Product Type
Angle Grinder
Voltage
20 V
Cordless or Corded
Cordless
Power Source
Battery
Tool Only
Yes

  • (1) DCG402 ATOMIC™ 20V MAX* 4 .5 in. Angle Grinder
  • (1) Type B Guard with Type A Clip-on Guard
  • (1) Type 27 Grinding Wheel
  • (1) Wrench
  • (1) Side Handle

  • 3 Year Limited Warranty, 1 Year Free Service, 90 Days Satisfaction Guaranteed

* *Maximum initial battery voltage (measured without a workload) is 20 volts. Nominal voltage is 18.

* **On average, using .045 T1 (DW8062) wheel (sold separately).

* ††Tool only based on volume vs. DCG408B Angle Grinder.

* ‡Additional subscription charge and third-party data charges may apply.

Related products & accessories

ATOMIC™

WHERE SIZE MEETS POWER™

Discover compact tools engineered for maximum performance. DEWALT® ATOMIC™ tools deliver the strength you demand without the bulk.

A DEWALT cordless angle grinder is placed on a metal workbench in a workshop. A person wearing dark clothing and gloves is holding a metal pipe, with various metal parts and tools visible on the table.
A worker using a DEWALT angle grinder to cut a metal pipe, producing sparks in an industrial workshop setting.
A person wearing a face shield, gloves, and a brown apron is using a DEWALT angle grinder to work on a metal piece, generating sparks. Another DEWALT tool is resting on the table nearby. The scene takes place in an industrial workshop.

Ergonomic design

Up to 29% smaller†† for access into ultra tight spaces.

A person wearing a face shield, gloves, and a brown apron is using a DEWALT angle grinder to work on a metal piece, generating sparks. Another DEWALT tool is resting on the table nearby. The scene takes place in an industrial workshop.
A person wearing protective gloves and clothing is using a DEWALT cordless angle grinder to cut through a metal pipe, creating sparks in a workshop setting.

Help maximize control

Equipped with the DEWALT® ANTI-ROTATION System. This feature quickly stops the wheel when a pinch, stall, or bind-up event is sensed, reducing reactionary torque. The switch needs to be cycled (turned on and off) to restart the tool.

Graphic with a yellow background stating 'BATTERY AND CHARGER NOT INCLUDED' in bold black and white text.

Bare tool notice

This item does not include a battery or charger. Compatible batteries and accessories can be found within the ATOMIC™ 20V MAX* system.

Graphic with a yellow background stating 'BATTERY AND CHARGER NOT INCLUDED' in bold black and white text.
A collection of DEWALT yellow and black power tools arranged in rows against a concrete wall, including drills, saws, grinders, and cordless tool batteries.

ATOMIC™

Designed to be compact and powerful for a wide range of applications, our ATOMIC™ 20V MAX* tools are WHERE SIZE MEETS POWER™.