Milwaukee 3670-20 M18 FUEL™ 4-1/2"-6" Braking Grinder, Paddle Switch

Unmatched Power. Maximum Reach. Total Safety.

The Milwaukee 3670-20 M18 FUEL™ 4-1/2" – 6" Braking Grinder is the most powerful cordless grinder in its class, delivering the performance of a 13-amp corded model. Driven by the POWERSTATE™ Brushless Motor, this grinder provides a sustained 9,000 RPM, giving you the torque required for heavy-duty grinding, surface prep, and cutting applications. The expanded 6-inch capacity allows for deeper cuts and more material removal per pass compared to standard 4-1/2" models.

Safety is engineered into every detail. The RAPID STOP™ Brake stops all accessories in under 2 seconds, while the Paddle Switch design ensures the tool shuts off immediately if control is lost. For added protection, the integrated Electronic Clutch prevents kickback during bind-up situations. As part of the M18™ system, the 3670-20 features REDLINK PLUS™ Intelligence, ensuring maximum performance and protection from overload during the most demanding metalworking tasks.

Why the Milwaukee M18 FUEL™ 6" Braking Grinder is a Heavy-Duty Essential:

• 13-Amp Corded Performance: High-torque brushless motor outperforms many corded grinders, even under heavy pressure.
• 6-Inch Capacity: Use larger wheels for increased depth of cut (ideal for thick pipe) and longer abrasive life.
• RAPID STOP™ Safety Brake: Enhances operator safety by bringing grinding and cutting wheels to a complete halt in under 2 seconds.
• Anti-Vibration Side Handle: Increases user comfort and reduces fatigue during long shifts in the shop or on-site.
• Tool-Free Guard & Accessory Changes: Features the FIXTEC Nut for hand-tightened disc changes and a tool-free guard adjustment.

Specifications