Ryobi 18V ONE+ 4-1/2" Angle Grinder Kit

When you spend time working with angle grinders, you know how essential it is to have a tool that combines power, versatility, and ease of use. Recently, I had the opportunity to test out the Ryobi 18V ONE+ 4-1/2" Angle Grinder (Model PCL445K1), and I was eager to see how it stacks up against the corded models I’ve used in the past.

Design and Ergonomics

Right out of the box, the Ryobi angle grinder impresses with its ergonomic design. The tool is well-balanced, fitting comfortably in my hand, which makes it easier to handle during longer tasks. The 3-position side handle is a thoughtful addition, providing flexibility whether I’m grinding at an awkward angle or cutting in a straight line. Additionally, the onboard wrench storage in the handle is a handy feature, ensuring that I always have it at my fingertips when I need to change accessories.

The grinder also features a tool-free adjustable guard, making it simple to reposition as needed without searching for additional tools. This is a small but significant convenience, especially when switching between grinding and cutting tasks.

Performance

The Ryobi 18V ONE+ grinder boasts a powerful motor that operates at 9,000 RPM. In practical use, this speed is sufficient for most DIY tasks. I tested it on various materials, including concrete, metal, and tile. The grinder performed admirably, making quick work of concrete surfaces and cutting through metal with relative ease. However, it’s worth noting that while it’s powerful, it’s not on par with some higher-end corded models when it comes to sustained heavy-duty tasks.

One of the standout aspects of using this cordless grinder is the freedom from extension cords. This was particularly beneficial when working in tight or outdoor spaces where power outlets are not readily available. However, this convenience comes at a cost: the battery life. I found that the grinder is quite power-hungry. Using a 4.0 Ah battery, I was able to get around 10-15 minutes of continuous heavy grinding before needing a recharge. For lighter tasks, the battery lasted longer, but it’s clear that having additional batteries on hand is essential for larger projects.

Durability and Build Quality

The tool feels robust and well-made. The die-cast metal gear case is a testament to its durability. This grinder is built to withstand the rigors of regular use, and it held up well during my testing period. The spindle lock feature also makes changing discs quick and efficient, reducing downtime.

Usability and Safety

Safety is always a concern when working with angle grinders, and Ryobi has integrated several features to address this. The tool’s switch is designed to prevent accidental starts, and the adjustable guard effectively shields from sparks and debris. However, I did encounter an issue with the switch design. In one instance, the switch mechanism overheated and started malfunctioning, refusing to turn off without removing the battery. While this might be an isolated incident, it’s something to be aware of.

Accessories and Battery Compatibility

The Ryobi angle grinder package doesn’t include a battery, but it is compatible with the entire ONE+ range, which is a huge advantage if you already own other Ryobi tools. The tool-free guard adjustment and the 3-position handle make it versatile for various applications, but I was disappointed that it didn’t come with any grinding or cutting discs. This meant an additional trip to the store to pick up the needed accessories, which was a minor inconvenience.

Practical Applications

During my testing, I used the grinder for sharpening lawn mower blades, cutting metal pipes, and grinding down rough concrete edges. It handled all these tasks reasonably well, though it did struggle a bit with deeper cuts in metal. The convenience of cordless operation was particularly noticeable when working on outdoor projects, where maneuverability can be a significant advantage.

Noise and Vibration

In terms of noise, the grinder is about what you’d expect from a tool of this nature. It’s loud, but not excessively so. Vibration levels are manageable, though prolonged use can still be tiring on the hands. It’s advisable to wear gloves and hearing protection to mitigate these effects.

Final Thoughts

The Ryobi 18V ONE+ 4-1/2" Angle Grinder is a solid addition to any DIYer's toolkit, especially if you already own other tools in the ONE+ system. Its cordless convenience, combined with a decent level of power and ergonomic design, makes it a versatile tool for a variety of tasks around the home and garden.

However, it’s not without its drawbacks. The tool’s appetite for battery power means that you’ll need to invest in multiple batteries for extended use, and its performance, while good, isn't quite up to the standards of more powerful corded models for heavy-duty tasks. Additionally, some minor design flaws, like the switch issue I encountered, suggest that there’s room for improvement.

Recommendation

Would I recommend the Ryobi 18V ONE+ 4-1/2" Angle Grinder? Yes, but with some caveats. If you’re looking for a cordless grinder for light to medium tasks and already have other Ryobi ONE+ tools, this is a worthwhile addition. Its convenience and versatility outweigh the minor inconveniences for occasional use. However, if you’re a professional or need a grinder for frequent heavy-duty work, you might want to consider a more robust, brushless model or stick with a high-quality corded grinder.