Many people feel tied to their corded angle grinders in the same way those grinders are forever tied to an electric market. However, significant improvements in electric motors and batteries in the past decade mean that you can get great power and runtime out of a modern cordless angle grinder.
Shopping online doesn’t always make it easy to find a good model, however. There are a lot of models on the market today, and it can be hard to tell which ones are worth the money, and which ones will die quickly or be a pain to use.
We want to help you not only get a great model but also get the model that is right for you. Toward that end, we’ve created these reviews of the best angle grinders of 2020. We’ve also included a buyer’s guide which includes a lot of good general information about cordless angle grinders.
|Top Pick||Bosch GWS18V-45 18V||
|Milwaukee M18 18V Lithium-Ion||
|Best for the Money||Hitachi G18DSLP4 18V||
|Ryobi P421 6500 18V Lithium Ion-Powered||
The Bosch GWS18V-45 is one of the best angle grinders on the market and would make a great addition to any shop. It comes with a powerful 18V motor, which can run for a long time on a single charge, but also has the power to cut through even the toughest jobs. The handle on this model is excellent, with a sturdy feel, and it does a great job of reducing the vibrations you feel, which leads to you feeling less worn out at the end of the job. And, the wheel guard is one of the sturdiest and safest available on the market, giving you that extra peace of mind that comes with well-made equipment.
This model also features technology that helps extend its battery life. The motor comes with electronic motor protection, which helps extend the life of the machine by keeping it cool, which also extends the life of the batteries, which themselves come with CoolPack technology which is designed to limit how hot they get. However, you don’t get any batteries with this model, so you’ll have to buy them separately. Overall, this is the cordless angle grinder to buy if you want a frustration-free experience.
The Milwaukee GIDDS2-2473523 M18 is the tool to get if you want top-of-the-line quality and don’t mind paying for it, too. This model has a lot of standout features, but chief among them is the fact that it uses a brushless motor. Manufacturers increasingly use brushless motors in their tools because they’re more power efficient, lighter, make less noise, and generate less heat, which are all critically-important features in a power tool. Since this model features one, you get all those features in this great tool. It also comes with a thin body, which makes it easy to hold, even when you’re wearing bulky gloves.
This model also utilizes a paddle switch, which makes it hard to turn on accidentally, and makes this a relatively safe tool to use. It also includes a battery, which makes it better than our top model in that area. However, the price is more than double what our top model costs, and even after factoring in the included battery’s cost, it is far more expensive than that model. It works well, and most people will appreciate how thin it is, but it ultimately costs too much to win first place.
The Hitachi G18DSLP4 is the best tool on the market for the money. The best thing about this model is its price, as you can get it for far less than would spend on the top two models on our list but get similar quality. It comes with overcurrent protection, which prevents motor burnout that would stem from a bad battery, which greatly extends its life. It also comes with a great, slip-resistant handle, which makes it easier to hold, even in situations where your hands might be oily. Without its battery, it weighs only four pounds, making it one of the lightest angle grinders on the market, which means you’ll be able to use it for a long time without feeling tired.
However, this model doesn’t come with a battery. That’s not a huge problem, as a lot of people already own the 18V batteries that you need for this device since they’re common to Hitachi’s portable tools line, but it’s something to keep in mind before you buy. It’s also not a brushless motor, so it’s not as good as our second model. However, if you’re looking to score a great deal, this is the model for you.
The Ryobi P421 6500 might tempt you if you’re looking to score an exceptionally cheap cordless angle grinder, but it does have some limitations you should know before you buy. One convenient feature that his model includes is an onboard pin wrench for replacing the grinder disc. Since it fits in the handle, you don’t have to worry about looking for it elsewhere when you need to change out discs. It also includes a grinding wheel, which is something most other models don’t do. Finally, it’s available for about half of what the other models on this list might cost.
However, it has some serious limitations. It burns through batteries very quickly, especially if you subject it to medium- and heavy-duty tasks. But, you probably won’t want to do that since it doesn’t have the greatest power. Furthermore, many users report that it is noisier than their corded angle grinders, which is bad since it’s nowhere near as powerful as those models. Overall, this is a decent model for someone looking to do some lightweight angle grinding and doesn’t need a tool that can do every job. If you’re looking for a true discount model, this is it.
The Metabo 613074620 is good enough that you might expect it to rank much higher on our list. However, it has the opposite problem as the fourth-placed model. Instead of being too cheap, there is a compelling case that this model is very overpriced. That’s not to say that it’s not a great angle grinder. It has an improved airflow system that keeps it cool while you work, which extends battery and motor life, and keeps your hands cool. It also has fantastic power and runtime relative to other models, and it’s rare that you find both qualities in a cordless model.
It also comes with a paddle switch, which reduces the number of accidental starts you’ll have. However, it weighs more than ten pounds, which makes it one of the heavier models on our list, and it’s the most expensive model on our list by far. Even after factoring in this model’s overall high quality, it’s hard to justify the price. If you want a model that works well and have money to burn, then this model would make a great addition to your shop. Otherwise, you’ll need to settle for something that has a more reasonable price tag.
Hopefully, our reviews have helped you learn more about the cordless angle grinder market. If you’re looking to learn more about these great tools, you’ve come to the right place. This buyer’s guide is designed with the beginner in mind, but it also includes a lot of great information that may benefit someone who has used these tools before. Reading this buyer’s guide is a good way to understand the reasoning that went into our reviews, as well as get a good feel for the market as a whole, so if you want to get the model that is right for you, make sure you read this guide.
While the battery may not seem like the most important component to you, it’s easily the most influential part of a cordless angle grinder. The grinder itself might be great, but if you have bad batteries, you won’t get great performance out of it, and you might not get a long runtime either. Without a long runtime, you might resort to using your corded model again, which is the situation that you’re trying to avoid.
Make sure you get a model that comes with lithium-ion batteries, as these models tend to weigh less, but also run longer than the competition. Lithium-ion batteries are also some of the fastest-charging batteries on the market, so you can get back to work faster when you do run out.
Keep in mind that many cordless angle grinders use the same batteries as the rest of the portable tools in a brand. So, if you already own Bosch or Hitachi cordless power tools, for instance, you will be able to use the batteries interchangeably between the models, which is a good way to extend your runtime.
Weight is another category that might not seem significant to you, but you want to make sure that you keep weight down for several reasons. One of the most significant reasons to get a cordless angle grinder is that you don’t have to deal with a cord, which means you should have unparalleled portability and maneuverability, making your job easier. Those benefits are canceled out if you get a cordless angle grinder that weighs a lot, as you’ll end up expending just as much effort to move it around as you would a corded model.
The best angle grinders weigh less than four pounds without their battery installed, while other acceptable models can weigh as much as 15. If you find a portable model that weighs more than that, you’ll probably want to avoid it, as the heavyweight is a likely sign of inferior craftsmanship, and it will wear you out far more quickly than a lighter model.
Many cordless angle grinders use brush motors, which is too bad given some of the great advantages of brushless motors. For once, they weigh less, but they also use less power, have less maintenance-related issues, and are generally quieter as well. This means brushless motors are the clear winners in most categories, though they have the significant downside of costing far more.
They’re a great feature to get in your cordless angle grinder if you can afford it, though there’s not going to be much of a difference in power relative to a brush motor. If you’re looking to save some money, it’s fine to go with the older motor style.
Other than the difference in weight, you generally won’t notice a difference between the two motors while you work, though runtime and noise are likely to be significantly different.
If you want to get great value for your money, you’re going to have to take a moment and think about what value is. Value isn’t just getting the cheapest model you can. We’ve all been burned a time or two by a deal that was too good to be true and turned out to be that way. At the other end of the spectrum are models that cost a lot of money, but don’t provide enough usefulness to justify their price.
If you want to get great value, you need to sit down and honestly evaluate your needs and preferences. If you focus your search on making sure that your needs are covered and then on covering as many of your preferences as well, you’ll end up with a tool that you’ll like using. And, that’s a good value situation no matter what the price is.
The Bosch GWS18V-45 is a great choice for anyone looking for a cordless angle grinder, due to its great motor, vibration-reducing handle, and battery-extending features. The Milwaukee GIDDS2-2473523 M18 is the best choice for someone looking for a model with a brushless motor, but its high price keeps it out of first place. The Hitachi G18DSLP4 is the overall best value, due to its slip-resistant handle, overcurrent protection, and lightweight. If you want a very cheap model, the Ryobi P421 6500 could work for you, but its short runtime and lack of high-end power will make it the wrong tool for most people. The Metabo 613074620 is a great cordless angle grinder, but its heft and very high price tag mean that it doesn’t provide excellent value for the price.
We hope that our reviews have helped you find the cordless angle grinder and have helped you become a well-informed shopper. This information should help you find a model that you’ll love, and that your wallet will love, too.
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Hi there! My name is Adam and I write for HealthyHandyman. I have a great passion for writing about everything related to tools, home improvement, and DIY. In my spare time, I'm either fishing, playing the guitar, or spending quality time with my beloved wife. You'll also often find me in my workshop working on some new project!