Are Cordless Angle Grinders Any Good

Cordless vs Corded: Are Cordless Angle Grinders Any Good?

Debating the efficacy of cordless angle grinders compared to their corded counterparts? Here’s a quick insight.

27/12/2023 – Update

In a Nutshell:

Yes, cordless angle grinders are impressively good, especially in their flexibility and convenience for onsite work. For example, while working in a confined boiler room, the maneuverability of my Milwaukee cordless grinder was a clear advantage over a corded one. These grinders maintain a balance between power and portability, though they may need multiple batteries for extended tasks. Corded grinders still excel in continuous, high-power demands but fall short in mobility and ease of use in tight spaces.

Want to delve deeper into which type of angle grinder will best suit your project needs? Read on for a comprehensive comparison based on hands-on experience and professional insights.

The Main Features of a Cordless Angle Grinder

Venturing into the world of cordless angle grinders, it’s crucial to understand their key features. As someone who’s switched from corded to cordless, I’ve experienced the leap in efficiency these tools offer. Let’s dissect the essentials that make these grinders a formidable addition to any toolkit.

Key Features of Cordless Angle Grinders

  • Battery Quality: The heart of a cordless grinder is its battery. Premium-grade lithium-ion batteries ensure consistent power without the need for frequent swaps mid-task.
  • Motor Type: Brushless motors are the stars here. They’re more durable and efficient compared to brushed counterparts, offering better longevity and reliability.
  • Weight and Maneuverability: Cordless grinders with brushless motors are lighter and more agile, allowing for precision and ease in complex tasks.

Consider this: a high-quality brushless motor in a cordless angle grinder can increase tool efficiency by up to 85%. Investing in one isn’t just about paying more; it’s about equipping yourself with a tool that’s built for endurance and precision.

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The Benefits of Cordless Angle Grinders

As someone who’s transitioned from corded to cordless grinders, I can attest to the liberating experience they offer. Cordless grinders are reshaping our approach to tasks, offering unparalleled mobility. But what sets them apart in the realm of power tools?

Crucial Advantages of Cordless Angle Grinders

  • Unmatched Mobility: Without a power cord, you’re free to move and maneuver with ease.
  • Advancing Battery Tech: Modern battery advancements mean longer life and more power, potentially outperforming corded models.
  • Power vs. Reliability: It’s not just about power; the reliability of the grinder, especially its battery life, is key.
  • Essential Features: While features like variable speed control and motor protection are valuable, the primary focus should be the grinder’s ability to meet your specific needs.

Disadvantages of Cordless Angle Grinders

  • Battery Dependency: Your work is limited by battery life, requiring spare batteries for longer projects.
  • Reduced Power in Some Models: Some cordless models may not match the sustained power output of corded grinders making it hard to cut cast iron.
  • Higher Initial Investment: Often more expensive due to advanced technology and the need for batteries and chargers.
  • Weight Consideration: Batteries can add extra weight, affecting the tool’s balance and user fatigue over time.

Did you know: Recent advancements in battery technology have led to a 50% increase in efficiency and longevity in cordless tools over the past five years? This evolution is not just enhancing convenience; it’s revolutionizing how we approach power-intensive tasks, making cordless grinders a smart, future-proof investment.

Unveiling the Edge: The Superiority of Brushless Grinders

Brushless grinders are not just a step ahead; they’re a leap in power tool evolution. As someone who’s worked with both types, I’ve seen firsthand the sheer efficiency brushless motors bring. They’re game-changers, especially in cordless tools.

Why Go Brushless?

  • Maintenance-Free: Brushless motors eliminate the need for brush replacements. For someone who prefers hassle-free tools, this is a huge plus.
  • Battery Efficiency: They significantly extend battery life. This means longer working hours without the need for constant recharging.
  • Enhanced Performance: Whether it’s grinding or driving, brushless motors deliver more power and endurance.
  • Durability: These motors have fewer moving parts, which translates to a longer lifespan for your tool.

Fun fact: Did you know that brushless motors can enhance the overall tool efficiency by up to 85% compared to brushed motors? This isn’t just about convenience; it’s about revolutionizing your work with unmatched power and longevity.

What Is The Best Brand Of Angle Grinder

What is the Best Brand of Angle Grinder?

Choosing the right angle grinder is crucial, and it often boils down to brand reliability. DeWalt, Makita, and Milwaukee stand out for their blend of innovation, durability, and performance.

These brands have consistently proven themselves in a competitive market, offering products that cater to both professional and DIY needs. Their grinders are more than just tools; they represent a commitment to quality and functionality, suitable for a range of tasks from simple home projects to demanding professional jobs.

BrandMarket PositionProsConsPrice Point
DeWaltMajor player, reliable toolsLongevity and innovation, High manufacturing standards, Robust and reliableSlightly premium pricing, Some models are heavierMid to high-range
MakitaPioneer in advancementsEstablished since 1958, Wide range of models, Excellent battery lifeLess accessibility in some markets, Higher price bracketGenerally mid-range
MilwaukeeFavored by professionalsAdvanced technology, High efficiency and power, Durable and ruggedHigher price than competitors, More professional-centricHigher range

Selecting the right angle grinder involves balancing power, durability, and comfort. For cordless models, prioritize battery life. Your choice should align with your needs and budget, as each brand excels differently.

What Are Angle Grinders Good For?

Honestly, a whole host of heavy-duty tasks both around the home for remodeling jobs or on construction sites for everyday building works.

Angle grinders are also a preferred power tool for mechanical plumbers, electricians, HVAC technicians, auto mechanics, sheet metal workers, concreters, and a whole host of other trades and professions.

If you’re an apprentice or are attempting works in any of the mentioned fields, you’re going to need an angle grinder in your arsenal.

As to whether you should get yourself a corded or cordless angle grinder… I’d say grab the latter and ensure it is equipped with a brushless motor as when you’re on the clock, time is literally money, and you don’t want to waste any running extension leads.

  • Smoothing rough concrete surfaces diamond cup wheel
  • Cutting metal material with a flat diamond cutoff blade
  • Polishing and buffing metal with an abrasive flap disc
  • Sanding wood with a hook and loop sanding pad
  • Cutting ceramic tiles with a diamond-tipped blade

As you can see, as long as you’re making use of the correct disc, there isn’t much an angle grinder cannot accomplish, which is exactly why they are such a popular power tool.

Either of the best cordless angle grinders I’ve suggested above will make light work out of any of the tasks referenced, so don’t think you’ll also need a corded counterpart unless you plan on cutting concrete slabs.

For that, you’ll need a concrete saw. A concrete saw is a different specialist power tool, that is generally something you’d want to hire and not own. Unless you’re a builder or concreter, then it might be worth buying a concrete saw.

Should You Buy a Cordless Angle Grinder?

Imagine effortlessly grabbing a cordless angle grinder from your truck or shed, sans the nuisance of untangling and running an extension lead. While managing an extension cord isn’t a monumental task, it becomes a cumbersome routine when using an angle grinder frequently. For regular use, a cordless grinder, especially one with a high-quality lithium-ion battery, proves to be a game-changer for diverse, demanding tasks.

Budget, as always, is a key consideration. It’s wise to balance your tool investment with other expenses, like materials. However, if your budget is more accommodating, and convincing your partner that a quicker bathroom remodel is on the horizon sounds feasible, a cordless angle grinder becomes an invaluable asset.

Why opt for cordless? These grinders are lighter, typically more powerful (particularly with brushless motors), and offer greater maneuverability without a cord in the way. That said, if your budget is tight, don’t overlook the value of corded grinders. They are cost-effective, reliable, and perform excellently.

To help you make an informed decision, regardless of your budget, our comprehensive review of the best angle grinders of 2024 covers both corded and cordless models, complete with an in-depth buyer’s guide.

Which is the Best Cordless Angle Grinder?

Let’s assume you’re not too keen on paying top dollar for your very first cordless angle grinder but still want a cordless grinder with a powerful motor, exceptional battery life, and superb build quality.

If that’s the case, don’t even bother fluffing around with anything other than the DeWalt DCG412B.

This small angle grinder is super robust and possesses an ergonomic design utilizing a trigger switch feature for increased comfort. While the DeWalt DCG412B doesn’t have a paddle switch feature, the over-under design with the trigger switch feels really good in-hand.

① Our Pick
Dewalt Dcg412B 20V Max 4-1/2” Angle Grinder DeWalt DCG412B 20V MAX 4-1/2” Angle Grinder
  • Incredibly powerful cost-effective cordless angle grinder that generates an impressive 8,000 RPM plus making it ideal for contractors.

  • A robust angle grinder has been specifically designed for more heavy-duty demanding applications including construction sites.

  • Awesome over-under handle design with a handy 2-finger trigger switch that is exceedingly comfortable to use for extended periods.

  • A very versatile angle grinder that can be used with either a 4 1/2-inch wheel or 5-inch cutting or grinding wheel attached to it.

Now, if the DeWalt DCG412B doesn’t rock your world, and you’ve got a bit more disposable income, there’s one other cordless grinder I’d recommend. If you’re after a cordless angle grinder that pulls no punches, there’s one cordless grinder that sores like an Eagle while the rest simply frolic around like Seagulls.

That trophy goes to the Makita XAG20Z.

The XAG20Z is Makita’s flagship model with everything from an extended paddle switch feature, highly durable and powerful brushless motor, variable speed control feature with 3-speed adjustment, and Makita’s renowned 18V LXT lithium-ion battery.  

Best Premium Grade Grinder
Makita Xag20Z 18V Lxt Bl 4-1/2 Cordless Angle Grinder Makita XAG20Z 18V LXT BL 4-1/2 Cordless Angle Grinder
  • Powered by Makita's BL™ brushless motor that produces over 8,500 RPM and operates exceedingly efficiently.

  • Equipped with an anti-restart protection system that prevents the motor from unwillingly starting.

  • Automatic Speed Change™ technology that automatically adjusts both speed & torque when grinding.

  • Rubberized slimline body with a soft grip construction that is super comfortable in-hand when grinding or cutting. 

In Conclusion

Cordless angle grinders have significantly evolved, capturing the market with their innovation and convenience. They are the ideal power tools for cutting tile and metal, making them ideal for either professional contractors or weekend warriors.

Key Takeaways:

  • Investment Worth: Despite a higher initial cost, the long-term benefits and efficiency make cordless grinders a smart investment.
  • Choose Quality: Opting for a model from a top-tier brand with superior battery efficiency guarantees satisfaction and performance.
  • DIY-Friendly: These grinders are an invaluable addition for routine DIY tasks, offering ease of use and versatility.

In essence, as battery technology continues to advance, cordless angle grinders are not just a trend but a staple in any toolkit, combining convenience with capability.