DeWalt 7 in. Brushless Small Angle Grinder, Rat Tail, with KICKBACK BRAKE™, No Lock, Pipeline Cover

The DeWalt 7-inch Brushless Small Angle Grinder, known by model number DWE43840CN, is a tool designed for heavy-duty grinding and cutting tasks. As someone who frequently works with metal and requires reliable tools, I decided to give this grinder a thorough test in various conditions. This angle grinder boasts several features that immediately caught my attention, including its brushless motor and the KICKBACK BRAKE™ system.

Design and Build Quality

At first glance, the DeWalt grinder impresses with its solid build and ergonomic design. The soft cover gear case grip is a thoughtful addition, especially for those longer grinding sessions where comfort becomes paramount. The rat tail design and the integrated lanyard attachment point are practical features for those working in challenging environments. The two-stage trigger adds an extra layer of safety, ensuring that the tool doesn't accidentally start.

Performance and Power

One of the most critical aspects of any angle grinder is its power, and the DeWalt grinder promises a robust performance with its 13-amp motor delivering up to 1800 watts. However, in practice, the grinder's power felt somewhat underwhelming, particularly for a tool marketed for heavy-duty use. When grinding welds on thick metal, the tool seemed to struggle, and I found myself needing to apply more pressure than I would have liked. This is particularly noticeable when using cheaper, lower-grade abrasives, which can force the user to bear down harder on the tool.

Safety Features

One of the standout features of this grinder is its KICKBACK BRAKE™ system, which is designed to stop the wheel quickly during a bind-up event. This feature works exceptionally well and adds a significant safety advantage, especially in high-risk environments. The brake stops the wheel in four seconds or less, which is impressive and can prevent potential accidents. The power-loss reset function is another useful safety feature, ensuring that the tool doesn't automatically restart after a power interruption.

Usability

The grinder is relatively lightweight and easy to maneuver, making it suitable for working out of position. However, the large guard can be a hindrance, limiting the tool's usability in tighter spaces. The lock button is also challenging to use with gloves on, which can be frustrating for those who prioritize safety and need to wear protective gear.

Durability and Reliability

Durability is a mixed bag with this angle grinder. While some users have reported months of reliable service, others have experienced significant issues within weeks of use. During my testing, the grinder held up well, but there were instances where it would heat up quickly, especially during extended use. This overheating can trigger the overheat protection, which is both a blessing and a curse. While it prevents damage to the tool, it also interrupts workflow, which can be frustrating.

Compatibility with Power Sources

One notable issue I encountered was the grinder's compatibility with GFCI (Ground Fault Circuit Interrupter) outlets commonly found on welding machines. The grinder frequently tripped the GFCI, which is a significant drawback for those working in environments where such outlets are standard. This issue can be particularly problematic on job sites, where reliable operation is crucial.

Final Thoughts

The DeWalt 7-inch Brushless Small Angle Grinder has a lot going for it, including a well-thought-out design, excellent safety features, and a comfortable grip. However, its performance and reliability leave something to be desired. The power output feels insufficient for the most demanding tasks, and the overheating issue can be a significant hindrance during extended use. The compatibility issues with GFCI outlets further complicate its usability on certain job sites.

Recommendation

Would I recommend the DeWalt 7-inch Brushless Small Angle Grinder? It depends on your specific needs. If you're looking for a lightweight, easy-to-maneuver grinder with excellent safety features for occasional use, this tool could be a good fit. However, if you require a grinder for heavy-duty, everyday use, especially in environments with GFCI outlets, you might want to consider other options. The inconsistent performance and durability issues make it hard to fully endorse this grinder for professional, high-demand applications. In summary, while the DeWalt grinder has its merits, it falls short in some critical areas that professionals might find limiting.