DeWalt DCG408B 20V MAX* 4-1/2″ Brushless Paddle Switch Grinder – Tool Only

High-Efficiency Industrial Brushless Motor Core. Constant Speed Under Load Velocity Control. Fast-Access Safety Paddle Switch Interface.

The DEWALT DCG408B Paddle-Switch Grinder features an efficient brushless motor, constant speed under load tracking, built-in overload protection, and protective intake mesh screens to deliver reliable, high-torque metalworking performance without tool drag.

The DEWALT 20V MAX Brushless Cordless 4 1/2" Paddle-Switch Grinder brings superior structural metal removal, advanced electronic system protection, and untethered cord-free grinding mobility directly to your commercial fabrication bay, structural plumbing layout, or field welding truck. Purpose-built to eliminate the frustrating power drops common with brushed motor grinders, the abrasive mechanical dust infiltration that destroys internal bearings prematurely, and the unsafe risk of a dropped tool remaining powered on, this premium professional 4.5-inch cordless grinder establishes a reliable trade baseline. It equips structural ironworkers, industrial welders, auto body mechanics, and metal fabricators with a high-durability cutting asset explicitly optimized to clean rough weld beads, bevel structural pipe edges, slice steel rebar, and prepare metal faces cleanly.

Outstanding physical component armor and intelligent motor speed regulation serve as the mechanical foundation for the DCG408B. Driven by an advanced DEWALT brushless motor core, the tool actively maintains its operational speed curves under heavy surface pressure, bypassing the slowing stalls typical of legacy tools. For safety, the tool features a convenient bottom paddle switch that shuts off power the instant you release your grip, paired with electronic overload protection to safeguard internal wiring from overheating during intense runs. Built to handle punishing steel-cutting environments, the tool incorporates dense debris-retaining mesh screens over the intake vents to block destructive grit from entering the internal motor components, completed by a tool-free guard adjustment system and an included clip-on cutting guard.

Why the DEWALT® DCG408B Brushless Paddle Switch Grinder Rules the Bench:

• Constant Speed Under Load Logic: Smart electronic power distribution drives consistent cutting speed past heavy down-pressure to keep your workflow moving fast.
• Instant-Off Safety Paddle Switch: Large under-body trigger paddle design allows you to comfortably start or kill power instantly by tightening or relaxing your hand.
• Debris-Rejecting Intake Mesh Screens: Removable metal mesh barriers wrap the cooling slots to prevent sharp metal filings from puncturing internal copper windings.
• Dual Guard Adaptability Included: Ships with a robust Type B grinding shield alongside a fast clip-on cutting guard to transform the tool in seconds.
• Universal 5/8" - 11 TPI Spindle Drive: Standard thread sizing allows for seamless fitment of industry-standard grinding wheels, abrasive discs, and wire knot cups.

Specifications