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The Milwaukee M18 FUEL Braking Die Grinder 2939-20 is a cordless 18V die grinder built to replace a corded unit. Its brushless motor spins up to 27,000 RPM and Milwaukee rates it at 11A corded power, enough to remove up to 12 inches of weld bead on one XC5.0 battery. RAPIDSTOP brings the accessory to a stop in under two seconds, which matters most when a burr binds in tight work. It takes 2-inch accessories and 1/4-inch shank bits, so it covers weld blending, deburring and surface prep. Against corded die grinders it trades unlimited runtime for freedom from a cord; against cheaper cordless rivals it leads on braking and RPM. Owners rate it highly, with a few noting battery draw and the bare-tool packaging.
In stockSold by Shady GrovesReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.
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Lowest price we've seen: $279.00 on Nov 14 at The Home Depot. Tracked across 2 stores since Nov 14.
Owners rate it 4.3 out of 5 and mostly praise the power and the brake, calling it close to a corded grinder in real work. Complaints center on battery consumption under load and the bare-tool setup.
The Milwaukee M18 FUEL Braking Die Grinder with slide switch (model 2939-20) is a cordless die grinder made to replace corded grinders. It is sold as a bare tool, so the battery is not included. It runs on an M18 battery and delivers the power of an 11A corded tool.
A brushless motor spins up to 27,000 RPM and keeps grinding power steady in tight spaces. RAPIDSTOP braking stops the accessory in under two seconds. With one M18 REDLITHIUM XC5.0 battery (sold separately), it can remove up to 12 inches of weld bead.
The slide switch is ergonomic and helps reduce fatigue during extended use. The grinder accepts 2-inch accessories and all 1/4-inch shank attachments, and it is used for material removal and surface preparation. REDLINK PLUS Intelligence lets the tool and battery communicate to help protect both and maintain performance.
