Isometric perspective view of the DEWALT cordless brushless angle grinder featuring the high-visibility yellow motor housing, a black 2-position side handle, and a protective Type 27 grinding guard for professional metalwork.
Left-side profile of the DEWALT DCG405B small angle grinder showcasing the brushless motor branding, ventilation ports for cooling, and the rugged overmolded grip designed for superior user control.
Infographic of the DEWALT 20V MAX XR angle grinder with technical callouts highlighting the 3.75 lb. weight, the integrated Power Loss Reset safety feature, and the convenient slide switch for continuous operation.
A low-angle front perspective of the DEWALT 4.5-inch cordless grinder emphasizing the heavy-duty metal gear case and the adjustable guard designed to protect the user during aggressive cutting and grinding.
Direct front view of the DEWALT DCG405B brushless grinder highlighting the spindle lock button for rapid wheel changes and the balanced design of the side handle for either left or right-handed use.
An isometric view of the DEWALT DCG405B highlighting the balanced weight distribution and the high-torque brushless motor capable of reaching 9,000 RPM for professional-grade material removal.
Rear angled view of the DEWALT brushless cordless grinder emphasizing the XR battery mounting rail and the durable industrial construction required for heavy-duty metal fabrication and demolition.
Three-quarter rear perspective of the DEWALT DCG405B bare tool illustrating the compact 12.2-inch length and the slide switch placement optimized for ergonomic one-handed tool activation.
A top-down angled view of the DEWALT 20V MAX XR angle grinder showcasing the sleek professional housing and the cooling intake vents located near the battery terminal to protect the brushless motor.
A straight side profile of the DEWALT DCG405B 20V MAX XR Brushless 4.5-inch angle grinder against a white background, highlighting the slim ergonomic body, slide switch, and the battery interface for the XR lithium-ion platform.
Side profile of the DEWALT 20V MAX XR Brushless 4.5-inch angle grinder with a black graphic banner highlighting enhanced safety features including the integrated kickback brake and power loss reset technology.
Isometric view of the DEWALT DCG405B cordless angle grinder with a bold text overlay stating the tool is ideal for carpentry and construction jobs, emphasizing its versatility in professional trade applications.
A professional metalworker wearing safety glasses and heavy-duty gloves using the DEWALT 20V MAX XR Brushless angle grinder to cut through a steel beam, demonstrating high-performance spark management and cordless power on the jobsite.
DEWALT Corded Brushless Grinders promotional video
Isometric perspective view of the DEWALT cordless brushless angle grinder featuring the high-visibility yellow motor housing, a black 2-position side handle, and a protective Type 27 grinding guard for professional metalwork.
Left-side profile of the DEWALT DCG405B small angle grinder showcasing the brushless motor branding, ventilation ports for cooling, and the rugged overmolded grip designed for superior user control.
Infographic of the DEWALT 20V MAX XR angle grinder with technical callouts highlighting the 3.75 lb. weight, the integrated Power Loss Reset safety feature, and the convenient slide switch for continuous operation.
A low-angle front perspective of the DEWALT 4.5-inch cordless grinder emphasizing the heavy-duty metal gear case and the adjustable guard designed to protect the user during aggressive cutting and grinding.
Direct front view of the DEWALT DCG405B brushless grinder highlighting the spindle lock button for rapid wheel changes and the balanced design of the side handle for either left or right-handed use.
An isometric view of the DEWALT DCG405B highlighting the balanced weight distribution and the high-torque brushless motor capable of reaching 9,000 RPM for professional-grade material removal.
Rear angled view of the DEWALT brushless cordless grinder emphasizing the XR battery mounting rail and the durable industrial construction required for heavy-duty metal fabrication and demolition.
Three-quarter rear perspective of the DEWALT DCG405B bare tool illustrating the compact 12.2-inch length and the slide switch placement optimized for ergonomic one-handed tool activation.
A top-down angled view of the DEWALT 20V MAX XR angle grinder showcasing the sleek professional housing and the cooling intake vents located near the battery terminal to protect the brushless motor.
A straight side profile of the DEWALT DCG405B 20V MAX XR Brushless 4.5-inch angle grinder against a white background, highlighting the slim ergonomic body, slide switch, and the battery interface for the XR lithium-ion platform.
Side profile of the DEWALT 20V MAX XR Brushless 4.5-inch angle grinder with a black graphic banner highlighting enhanced safety features including the integrated kickback brake and power loss reset technology.
Isometric view of the DEWALT DCG405B cordless angle grinder with a bold text overlay stating the tool is ideal for carpentry and construction jobs, emphasizing its versatility in professional trade applications.
A professional metalworker wearing safety glasses and heavy-duty gloves using the DEWALT 20V MAX XR Brushless angle grinder to cut through a steel beam, demonstrating high-performance spark management and cordless power on the jobsite.
DEWALT Corded Brushless Grinders promotional video
DEWALT

DEWALT Angle Grinder DCG405B 20V 4.5 Inch Corded Replacement Cordless Skin (9000 RPM Brushless Slide Switch Kickback Brake Power Loss Reset Bare Tool)

Only 1 left
SKU: DCG405B
$187.00 USD

Description

Authorized Dealer Badge DEWALT logout

Halt Wheel Rotation under Two Seconds during Sudden Bind Ups and Prep Structural Weld Lines Safely

The DEWALT DCG405B 20V MAX* XR® Brushless 4.5-Inch Angle Grinder is an industrial-grade cordless metal fabrication instrument engineered to deliver up to 9,000 RPM of rotational velocity. This heavy-duty power tool features an advanced electronic brake that stops wheels in under two seconds and a specialized dynamic kickback sensor to shut down the motor during severe wheel pinches or stalls. Outfitted with a slim ergonomic gear housing, a secure safety slide switch, and a Power Loss Reset® circuit, this compact layout tool optimizes mobile productivity across commercial construction grids. **Battery and charger sold separately.

Best Used For:

  • Commercial Rebar Cutting: Slicing rapidly through thick concrete reinforcing iron rods and heavy mesh layouts unassisted on structural project slabs.
  • Structural Steel Beveling: Removing mill scale, cleaning slag, and beveling heavy carbon steel plates prior to multi-pass welding sequences.
  • Restricted Mechanical Grinding: Smoothing rough metal edges and trimming hanging hardware struts inside tight utility chaseways or narrow ceiling runs.

Key Performance & Safety Features

  • XR Brushless Motor Efficiency: High-performance drivetrain deletes carbon brush wear cycles while maintaining consistent operational speed profiles under heavy feed pressures.
  • PERFORM & PROTECT™ Kickback Brake: Electronic deceleration system stops abrasive wheel movement within 2 seconds if an internal binding index is breached.
  • Power Loss Reset® Circuitry: Smart electrical monitor blocks unexpected motor self-starting if a fresh battery pack is inserted while the slide switch sits engaged.
  • Ergonomic Slimline Grip Frame: Reduced chassis diameter allows operators to balance the tool securely while wearing thick leather welding gloves.
  • Two-Position Side Control Handle: Auxiliary stabilizing handle mounts on either side of the cast metal gear box to optimize tool tracking leverage.

What's Included

  • (1) DCG405B 20V MAX* XR® Brushless 4.5-Inch Angle Grinder Chassis Skin
  • (1) Two-Position Adjustable Lateral Side Handle
  • (1) 4.5-Inch Type 27 Depressed Center Grinding Wheel Safety Guard
  • (1) Matched Inner and Outer Structural Wheel Flange Set
  • (1) Hex Key Adjustment Wrench

Technical Specifications

Brand Manufacturer: DEWALT
Model Number (SKU): DCG405B
Product Type Category: Cordless Compact Angle Grinder
System Operating Voltage: 20V MAX
Internal Motor Architecture: High-Efficiency Brushless (XR Series)
Maximum No-Load Speed: 9,000 RPM
Maximum Wheel Diameter: 4.5 in
Spindle Arbor Standard: 5/8 in - 11 UNC Threaded Interface
Actuation Switch Style: Locking Slide Switch
Configuration Classification: Bare Tool Only (Battery & Charger Sold Separately)
Active Safety Mechanisms: Kickback Brake / Electronic Power Loss Reset
Overall Tool Frame Length: 12.2 in
Net Base Skin Weight: 3.75 lbs
Country of Origin Manufacturing: China

PRO-TIP: When dropping this cordless grinder into tight structural channel cuts, let the 9,000 RPM velocity establish its scoring kerf naturally before leaning into the frame. Maintaining a straight feed alignment line prevents binding conditions entirely, ensuring the integrated Kickback Brake remains passive while extending cutting disc life.