The Ultimate Guide to Choosing the Best Cordless Angle Grinder: Unveiling Electric Motor Power, Safety Features, Weight, Speed, and More!

Are you tired of lugging around heavy, inefficient power tools that just don't get the job done? Well, say goodbye to the frustration because we've got the solution you've been searching for: the best angle grinder cordless. These cutting-edge tools boast electric motor power, impressive safety features, and feather-light weight, all while delivering lightning-fast speeds. But that's not all – we'll also break down the battle between brushless and brushed options, giving you all the information you need to make the right choice. Get ready to revolutionize your DIY projects with the power-packed wonder of the best angle grinder cordless – let's dive in!

Electric Motor Power

Despite their powerful motors, the grinders we recommend in this review, such as Milwaukee, DeWALT, Boch, and Makita, could benefit from being more transparent about their motor capabilities. These brands are known for their high-quality cordless tools, not just angle grinders.

Safety Features

The best cordless angle grinders come equipped with multiple safety features to prevent accidents and injuries. Let's take a closer look at these features:

  • Soft start - This technology allows the operator to prepare as the tool starts slowly and gradually accelerates. It not only prevents gear wear but also makes the angle grinder easier to control.
  • Electronic clutch - Also known as E-clutch or AFT, this feature stops the motor if the wheel gets pinched or stalled, ensuring the tool doesn't react violently and cause harm to the user or damage to the workpiece.
  • Kickback protection - Similar to an electronic clutch, the kickback brake quickly stops the motor if any binding is detected, providing an additional layer of safety.
  • Anti-restart protection - This important safety measure prevents accidental startup in case of power outages or battery changes. It ensures that the motor won't activate the grinder until the trigger has been cycled (turned off and back on), preventing unnecessary damage or injury.

Conclusion: In our review, we have considered only premium brands with a long history, such as Makita, Milwaukee, DeWALT, and Boch. These brands have extensive experience, a solid reputation, and employ top-of-the-line engineers. Therefore, it's no surprise that their angle grinders outlast others by a considerable margin. Angle grinders are versatile tools that you'll come to rely on, so it's important to invest in high-quality tools to avoid future costs.


The weight of an angle grinder is often indicative of its build quality, although there are exceptions like DeWALT, whose angle grinders are both well-built and lightweight. However, the Makita model we reviewed is heavier than others but offers superior sturdiness.

If you anticipate frequent use of cordless grinders during your workday, it may be worth considering a lighter grinder, even if it sacrifices some sturdiness. Adding the weight of the battery to the grinder's weight can become burdensome and potentially lead to wrist injuries, especially if the angle grinder lacks proper vibration control.

Speed (RPM)

The revolutions per minute (RPM) value provided by manufacturers is typically rated at no load, meaning the angle grinder operates at that speed without a grinding blade attached. Once a grinding wheel is installed, the speed will naturally decrease. Furthermore, during actual cutting, the tool's speed will further decline.

However, we found that any quality angle grinder in our review maintains most of its rated speed even under severe load conditions.

It's important to note that larger disc sizes usually correspond to lower RPM. However, this is not always the case, as a more powerful motor may handle larger disc sizes better than a weaker motor. For example, our top pick from Milwaukee supports disc sizes up to 6 inches at a speed of 9000 RPM, while DeWALT, Makita, and Boch have lower RPM at a 5-inch disc size.

Remember that a higher RPM enables faster cutting or grinding, but it may also result in quicker wear of the grinding wheel.

Brushless Vs Brushed Cordless Angle Grinder

In addition to having a significantly longer lifespan, brushless motors are generally considered superior, although they can be more expensive. For the best performance, we recommend choosing a brushless angle grinder.

The best angle grinders: Reviews & Recommendations

If you're someone who frequently undertakes home renovations or projects, an angle grinder is an essential addition to your toolbox alongside an impact driver and other specialized power tools. Here are our top picks for stocking up your toolbox or storage shed:

Best overall: DeWalt 4-1/2" Angle Grinder

[Image: DeWalt makes one of the best angle grinders overall.] Why it made the cut: This high-quality DeWalt tool combines excellent power with reliable features.


  • Size: 4-½ inches
  • Power: 11 amp
  • Weight: 8.25 pounds


  • High-performance motor with overload protection
  • Safety lock prevents accidental starting
  • Rapid, 360-degree guard adjustment


  • Case quality doesn't match that of the tool

DeWalt's 4-½-inch angle grinder is a durable and reliable tool designed for consistent, trouble-free performance. With an 11-amp motor delivering a speed of 11,000 rpm, this angle grinder can effortlessly cut through concrete or steel with equal ease.

Designed to protect the motor, this model includes a dust-ejection system that blows debris away from the tool. It also features overload protection and a safety lockout on the paddle switch to prevent accidental operation. The guard can be rotated through 360 degrees without the need for tools, offering flexibility and convenience.

Although the tool's low-profile body allows for reaching into tight spaces, it is slightly longer and heavier than other options on the market. Nonetheless, it is a professional-grade tool suitable for home auto restorers and major remodeling projects.

Best cordless: Milwaukee Cordless 4-1/2" Angle Grinder

[Image: Milwaukee makes the best cordless angle grinder.] Why it made the cut: Cordless tools provide freedom and portability, and this Milwaukee angle grinder competes with many mid-range corded models.


  • Size: 4-½ inches
  • Power: 7 amp
  • Weight: 5.2 pounds (plus approximately 1 pound battery)


  • Competitive performance without a cord
  • Full-length paddle switch
  • Five-year warranty


  • Modest run time
  • Battery and charger not included
  • Case not included

The cordless Milwaukee 4-½-inch angle grinder strikes a balance between portability and performance. With its 7-amp motor running at 9,000 rpm, it offers comparable performance to other models discussed without the limitations of a cord. The tool includes features such as baffle systems for debris control and overload protection for enhanced durability.

For users who already own compatible Milwaukee tools and batteries, this angle grinder is an excellent addition. However, keep in mind that additional expenses may arise if you need to purchase batteries and a charger separately to maximize run times. Nevertheless, it offers the convenience and freedom of cordless operation.

Best for hobbyists: Makita 4-1/2" Angle Grinder

[Image: Makita makes one of the best angle grinders for hobbyists.] Why it made the cut: This angle grinder is perfect for hobbyists who frequently use the tool and seek a balance between performance and value.


  • Size: 4-½ inches
  • Power: 7.5 amp
  • Weight: 4.5 pounds


  • Impressive power despite lightweight
  • Spare wheels for grinding and tile/masonry cutting
  • Excellent aluminum case


  • Occasional reports of faulty motors

Despite its compact size, the Makita 4-½-inch angle grinder offers plenty of power with its 7.5-amp motor running wheels at a speed of 11,000 rpm, enabling fast cutting and grinding of various materials. For added durability, the "Labyrinth" motor housing keeps out dust, while the zig-zag varnish coating on the armature offers extra protection.

The tool features ball bearings in the gears to reduce friction and heat, ensuring its longevity. With an easy-to-use paddle switch and two guards for different applications, this angle grinder is suitable for a range of tasks. The package also includes a diamond wheel for tile and masonry cutting, as well as five general-purpose grinding wheels. The aluminum case adds to the overall value and protection of the tool.

Best heavy-duty: DeWalt 7"/9" Angle Grinder

[Image: DeWalt makes one of the best angle grinders for heavy-duty jobs.] Why it made the cut: For true heavy-duty tasks, the DeWalt 7-inch angle grinder offers outstanding performance and reliability.


  • Size: 7 inches and 9 inches
  • Power: 5.3 horsepower (approximately 40 amps)
  • Weight: 18.5 pounds


  • Impressive performance
  • Multiple handle positions for excellent ergonomics
  • Motor overload protection

The DeWalt 7-inch angle grinder excels in heavy-duty applications that go beyond the capabilities of 4-½-inch models. Its 5.3-horsepower motor operates at 6,000 rpm, offering incredible power to tackle any job. With adjustable tool-free guards and various handle positions, this angle grinder ensures flexibility and ergonomic comfort.

DeWalt prioritizes performance and reliability, evident in features like overload protection for the motor and an epoxy-coated armature to prevent debris from affecting performance. Even the rubber power cord is double-insulated to withstand extreme climate conditions.

While the size and weight of this tool may be substantial, it compensates with exceptional control and usability. Whether you're working on major projects or professional tasks, the DeWalt 7-inch angle grinder is a top-tier choice.

Why it made the cut: Metabo HPT delivers an affordable yet high-quality 4-½-inch angle grinder that includes spare wheels and a case.


  • Size: 4-½ inches
  • Power: 6.2 amp
  • Weight: 4 pounds


  • Lightweight and versatile
  • Outstanding value for the price
  • Comes with five grinding wheels and a case


  • Occasional switch problems
  • Manual could be improved

The Metabo HPT 4-½-inch angle grinder offers solid performance and versatility for the price, making it an excellent choice for DIYers looking for a budget-friendly option. With its 6.2-amp motor running at 10,000 rpm, it can handle light metal grinding, tile cutting, and various other household tasks. The tool features a vent system for dust control and a compact, lightweight body for easy handling.

While left-handed users may find the side-mounted slide switch slightly awkward, the auxiliary handle can be mounted on either side for added convenience. Although the guard cannot be adjusted, it fulfills its purpose effectively. With its inclusion of five grinding wheels and a sturdy case, the Metabo HPT angle grinder offers exceptional overall value.

In conclusion, when it comes to finding the best cordless angle grinder, it's important to consider the electric motor power, safety features, weight, speed (RPM), and whether it is brushless or brushed. By weighing these factors and looking at reviews and recommendations, you can make an informed decision and find the perfect angle grinder to tackle any task. So don't let cords hold you back, embrace the freedom and convenience of a cordless angle grinder and take your DIY projects to the next level. Whether you're a professional tradesperson or a dedicated DIY enthusiast, a high-quality cordless angle grinder is sure to become your go-to tool in no time.

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