Ryobi 18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool

Testing out the Ryobi 18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool was an interesting experience. This tool is designed to cater to both cutting and grinding applications, and it certainly has some noteworthy features. With a speed of up to 9,200 RPM, it promises to deliver on performance. However, like any tool, it has its strengths and weaknesses.

Design and Build Quality

The first thing I noticed was the build quality. The grinder feels solid and well-constructed. Weighing in at 6.2 lbs with a battery, it has a substantial heft that gives a sense of control and stability during use. The ergonomic design, complete with a rubberized grip, makes it comfortable to hold even during extended periods of operation. The large paddle switch is a thoughtful addition, making it easy to operate while wearing gloves. The 3-position side handle also adds versatility, allowing for better control depending on the task at hand.

Performance

Performance-wise, the Ryobi angle grinder stands out in several areas. The brushless motor provides a noticeable improvement in power and efficiency. I found that it cuts through rebar and other materials with relative ease. The tool-free wheel removal and guard adjustment are convenient features that save time and effort, especially when switching between different tasks.

One of the most significant advantages is the cordless nature of the tool. Not having to deal with extension cords is a massive plus, particularly for outdoor projects or areas without easy access to power outlets. The 18V ONE+ battery system is compatible with a wide range of Ryobi tools, which is a great bonus if you already own other tools from the same line.

Battery Life and Compatibility

Battery life is a mixed bag. Using a 6Ah battery, I was able to get about 7 minutes of continuous use at full speed, which is decent but not exceptional. It’s worth noting that the tool performs better with higher capacity batteries. Smaller batteries, like the 2Ah ones, tend to cause the tool to cut out more frequently under load. This can be frustrating if you’re in the middle of a task and have to keep restarting the tool. For optimal performance, I’d recommend using at least a 4Ah or 6Ah battery.

Safety Features

Safety is a crucial aspect, and Ryobi has incorporated some thoughtful features in this regard. The new starting switch design is particularly noteworthy. It’s comfortable to use and automatically stops when you release your grip, preventing the grinder from running unattended. This is a significant safety improvement over older models. The tool also includes two types of guards – one for grinding and one for cutting – which enhances its versatility and safety.

Limitations

Despite its many strengths, the Ryobi angle grinder does have some limitations. One of the more significant issues is its tendency to shut off under load. This seems to be a common problem, particularly with older or smaller batteries. While the tool performs admirably with new, high-capacity batteries, it can be unreliable with less powerful ones. This makes it less suitable for heavy-duty, continuous use.

Another limitation is the depth of cut. The grinder can cut up to ¾” in depth, which may not be sufficient for some tasks. Older models, like the AG0703, offer a deeper cut, making them more versatile for certain applications.

Practical Applications

In practical use, I found the grinder to be quite effective for a variety of tasks. It sands down metal surfaces quickly and efficiently, making it ideal for automotive or metalworking projects. Cutting through metal poles and rebar was straightforward, although it did require frequent battery changes for extended tasks. The tool-free wheel change system is a real time-saver, allowing for quick transitions between grinding and cutting.

Final Thoughts

Overall, the Ryobi 18V ONE+ HP Brushless 4-1/2" Angle Grinder/Cut-Off Tool is a solid performer with some excellent features. Its cordless design, powerful brushless motor, and ergonomic build make it a valuable addition to any DIYer’s toolkit. However, its reliance on high-capacity batteries and occasional performance issues under load are worth considering.

Would I recommend this tool? Yes, but with some caveats. If you already own other Ryobi ONE+ tools and have high-capacity batteries, this grinder is a fantastic addition. Its convenience, performance, and versatility make it well worth the investment. However, if you’re looking for a tool for heavy-duty, continuous use, you might want to consider a corded model or ensure you have the appropriate batteries to get the most out of this grinder. For occasional use and lighter tasks, it’s an excellent choice that offers great value for money.