Milwaukee M18 FUEL™ 5" Flathead Braking Grinder, Slide Switch Lock-On

As a long-time user of various power tools, I've had the opportunity to put Milwaukee's M18 FUEL™ 5" Flathead Braking Grinder with Slide Switch Lock-On (model 2887-20) through its paces. This cordless angle grinder promises a lot with its cutting-edge features and design, and I was eager to see if it could live up to the high expectations set by its specifications.

Design and Build Quality

At first glance, the grinder impresses with its robust build and ergonomic design. The tool's low profile head is particularly noteworthy, making it easier to access tight spaces that other grinders struggle to reach. This feature alone can be a game-changer for professionals who often find themselves working in constrained environments.

The grinder is relatively lightweight at just under 3 pounds, which makes it easy to handle over extended periods. The balance of the tool, even with a 6Ah battery, is commendable and contributes to reduced user fatigue. Milwaukee has also incorporated a vibration-dampening side handle, which is a thoughtful addition for those long grinding sessions.

Performance

The M18 FUEL grinder boasts a POWERSTATE™ Brushless Motor that delivers 8,500 RPM, equating to the power of an 11A corded grinder. This cordless freedom, combined with such power, makes it incredibly versatile for various applications, from cutting pipe to grinding metal surfaces. I found the grinder to cut through materials effortlessly, maintaining consistent power without bogging down.

One of the standout features is the RAPIDSTOP™ Brake, which halts the wheel in under two seconds. This is not just a convenience but a significant safety feature, allowing for quicker transitions between tasks and reducing the risk of accidents.

Safety and Usability

Speaking of safety, the tool-free guard adjustment is a feature I quickly came to appreciate. Adjusting the guard angle without needing additional tools saves time and makes the process seamless. The grinder comes with both open and closed guards, providing flexibility depending on the task at hand.

The sliding switch with lock-on functionality is another well-thought-out feature. It allows for continuous operation without the need to hold down the switch, which can be a relief during extended use. However, I did notice that the backing flange is not removable, which limits the types of abrasive disks you can use. This was a bit disappointing, especially for specific professional applications that require such flexibility.

Battery Life and Compatibility

The M18 FUEL grinder is compatible with all M18™ batteries, and I tested it primarily with a 6Ah battery. The battery life was impressive, allowing for extended use without frequent recharges. Milwaukee’s REDLINK PLUS Intelligence ensures optimal performance and protects the tool and battery from overload and overheating.

Charging the battery to full capacity took about 30 minutes, which is relatively quick and keeps downtime to a minimum. The pop-off filter screen on the motor’s air inlets is another practical feature, preventing debris from entering the motor and prolonging the tool’s life.

Versatility and Applications

One of the grinder's strengths is its versatility. From woodworking to metal grinding, the tool handled various tasks with ease. The controlled start feature ensures there's no abrupt jerk when the tool powers up, which is particularly useful for precision work. The ability to use 4.5” to 6” accessories further enhances its utility, although the 4.5” guard must be purchased separately.

The FIXTEC nut for tool-free accessory changes is a brilliant addition, making it easy to switch between tasks without the need for extra tools. However, the safety lock-out for the paddle switch could be more intuitive. Moving your hand back to engage it and then forward to start the tool felt a bit cumbersome.

Durability and Maintenance

The grinder feels built to last, with high-quality materials and a sturdy construction. The brushless motor is designed for longevity, and the tool comes with a five-year warranty, which adds peace of mind. The battery also has a three-year warranty, which is a good indicator of its expected lifespan.

Maintenance is straightforward, thanks to the removable dust screen and the tool-free guard adjustments. These features make it easy to keep the grinder in good working condition, even in demanding environments.

Final Thoughts

Overall, the Milwaukee M18 FUEL™ 5" Flathead Braking Grinder with Slide Switch Lock-On is a powerful, versatile, and well-designed tool. Its low profile head, rapid braking system, and cordless convenience make it an excellent choice for professionals and DIY enthusiasts alike. While it has a few minor drawbacks, such as the non-removable backing flange and the somewhat cumbersome safety lock-out switch, these are outweighed by its many strengths.

I would highly recommend this grinder to anyone looking for a reliable and powerful cordless angle grinder. Its combination of performance, safety features, and ease of use makes it a valuable addition to any toolkit. Whether you're a professional tradesperson or a dedicated DIYer, this tool is likely to meet and exceed your expectations.