Milwaukee M18 FUEL Braking Grinder 4-1/2/6 in with Paddle Switch – Tool-Only (3670-20)

Powerful cordless grinding with lasting versatility

Designed for professional metalworking and ambitious DIY projects, the Milwaukee M18 FUEL 4-1/2 in./6 in. Braking Grinder with Paddle Switch offers the freedom of a cordless tool without sacrificing power. The tool features a Milwaukee-built brushless motor that helps maximize efficiency and performance during material removal, edge shaping, and smooth finishing. Because this is a tool-only package, you can pair the grinder with your preferred M18 battery and charger, letting you scale your power on site or in the workshop.

From the moment you grip it, you notice the thoughtful design. The ergonomically shaped handle and balanced weight deliver comfortable control through long sessions. The paddle switch supports one-handed operation, so you can start, stop, and adjust your approach while keeping a steady grip. The 4-1/2 in. and 6 in. wheel options give you flexibility for small precision work or larger material prep, making it a versatile choice across projects.

Braking and control

Key to safer, faster workflows is the integrated braking system, which stops the wheel quickly after you release the trigger. In practice, this can reduce wait times between passes and help you reposition with confidence. The braking function is complemented by a robust build that resists dust and debris from grinding metal.

Versatility and common tasks

• Brushless motor for efficient performance and longer tool life
• Braking system enables rapid stopping for safer, more controlled cuts
• Paddle switch provides smooth, one-handed operation
• Supports 4-1/2 in and 6 in grinding wheels for different tasks

Real-world scenarios include fabrication shops, automotive projects, and renovation tasks where you want clean cuts, smooth edges, and reliable performance without tethering to a cord.

• Wheel changes for deburring and edge preparation
• Quick wheel swaps to match material and project demands
• Compatibility with the M18 battery ecosystem for site flexibility

Note: This is a tool-only listing. Batteries and charger are sold separately to enable you to select the exact capacity you prefer for your jobs.