Milwaukee 2780 20 Angle Grinder Review

Milwaukee 2780 20

In this article, we will do milwaukee 2780 20 review. The Cordless Angle grinder have become a lot more popular power tools these days. A cordless grinder have many functions from cutting tiles and concrete to sharpening your tools. If you are a professional blacksmith or even an amateur worker angle grinders are essential for you to have besides other cordless tools.

Milwaukee 2780-20 Angle Grinder General Overview

Milwaukee tool company has released its new model Milwaukee 2780-20 M18 angle grinder. From the first look on the specs, design, and price, you will realize that it is a unique tool.

The company proudly says that this model comes with motor life ten times than other motor models. We can easily say that it is not an exaggeration. Its brushless engine avoids many problems than previous models, and it also gives a charming performance. The company provides a 5-year warranty on your device. You can buy the grinder alone or grab a complete combo-kit set. In the next few paragraphs, we will go a bit in-depth about this model analyzing its features, pros, and cons.


  • Speed: Up to 8,500 RPM
  • Weight: 5.38lbs
  • Dimensions: 2.3″ x 12.9″ x 7.6″
  • Arbor Size: 5/8″-11 inches
  • Battery: It is of Lithium-Ion

The Features

Here is our review of some of the most important features in Milwaukee 2780 20:

Milwaukee 2780 20 Design

The Milwaukee 2780-20 Angle Grinder comes with a modern ergonomic design.

The grinder weighs 5.38 pounds, lighter than most other grinders. This lightweight will make you more comfortable while working for extended periods on your projects.

The paddle switch grinder in the Milwaukee 2780-20 model is simple and very easy to use. The sidebar comes covered with rubber to prevent slipping, vibration, and pushbacks.

You do not need to hold the switch down to keep the tool running. The paddle’s design and the sidebar allow you to apply more power while cutting and more control in tight areas.

The Milwaukee 2780-20 comes with metal housing which allows much more durability and longer life than cheap ones guarded by plastic bodies. The metal housing allows more strength and overload protection in a harsh working environment.

Milwaukee 2780 20 Power

As mentioned before the brushless motor used in this grinder is the real deal. It operates at full speed of 8500 RPM. This motor provides enough power and performance similar to corded grinders to tackle both difficult and easy tasks as well.

Users reported a smooth performance and reliable power output compared to other cordless angle grinders.

Milwaukee Heavy Duty Grinder Performance

Milwaukee is considered one of the heavy duty power tools. The REDLINK intelligence system is an added feature. It is an integration system between the battery and the motor. It keeps them from overheating and allows extended smooth performance. This system is unique to Milwaukee 2780-20 M18.

Milwaukee 2780 20 Battery

The Milwaukee 2780-20 angle grinder operates with a set of M18 batteries. The batteries are of the Redlithium XC4.0 type. The model gives about four times more running times and increases power by 20%.

Accessory changes

The Milwaukee 2780-20 M18 model allows you to change parts and adjust your guards without any extra tools. This saves you more space in your kit bag and more time when working on site.

Box contents


  • Milwaukee M18 Fuel Angle Grinder – 2780-20 (Bare tool).
  • Guard.
  • Side Handle.
  • Instruction Manual.
  • If you buy the  Bare tool only, battery and charger are not included.


Milwaukee 2780-20 M18 Fuel is sold on Amazon for 125$ for the bare tool. This price is very reasonable, showing the great specs and quality of this tool. It is also rated at 4.3 /5, which is excellent and reflects the great user experience.

Pros & Cons


1.Rapid stop braking system:

The tool has a safety feature that instantly stops spinning the wheel. The brake feature works fine and stops the wheel in a couple of seconds or less. This can help with durability and is also good for operators because they are safer than having to stop manually, which could result in an accident if you weren’t paying attention.

2.A padded grip.

A safety measure that keeps sweaty hands to the minimum.

With tool-free adjustment options, you won’t need a wrench to adjust the guard anymore.

3.A paddle switch design.

Milwaukee 2780-20 encompasses a unique design that keeps you safe from accidents. It has an innovative safety system that allows the user to switch without interrupting their work and can be used at any angle, even in awkward positions for more efficient grinding operations!

4.Available different wheel sizes.

The grinders in this angle grinder can handle 5-inch or 4 1/2 inch grinding wheels. This means it’s great for any project that requires a larger wheel size, as opposed to those with just the smaller ones available on other models of similar tools. Makes sense right? The difference between these two measurements corresponds directly onto which projects you’ll be able use your tool for!

Other Pros:

  • Durable construction
  • The size makes it easy to transport but also makes it a bit awkward to use.
  • Better than expected power.


1. Only single-speed Available.

Variable speed controls are not available on this unit, which makes it less versatile than other models. While it has an 8500RPM motor and can do general work with no problem, Variable RPMs would be helpful when working in tight spaces or removing paint for finer detailing tasks like buffing and polishing

2. No Switch Locks

No lock to hold the switch in place. Some cuts necessitate choking up on the grinder body to have more dexterity. That isn’t really an option because of this.

3. The Brake sounds

They are a little noisy, which makes you think that there is something wrong with the gearing system (probably not!).

Other Cons

  • The battery may drain faster than most similar tools.
  • The paddle switch is far from ergonomic.

What We liked

  • Excellent ergonomic design with metal housing and high-quality premium materials.
  • The engine power is impressive and provides high strength and smooth performance.
  • Different safety precautions, including electronic clutch and deadman paddle to prevent injuries and destruction.
  • REDLINK PLUS Intelligence system which protects against overheating.
  • An overall good design which delivers good control. In addition, the premium materials suggest that the tool is going to survive in multiple situations.

What we did not like

  • The batteries are drained in about 10 minutes of use. You need to buy extra batteries for longer usage time.
  • The on/off switch is a bit weird and not easy to use.
  • The handle in this model is a bit shorter than previous models which makes it uncomfortable.
  • The device is somewhat noisier than other brands like DeWalt.
  • Final words

In brief, Milwaukee 2780-20 M18 angle grinder is one of the best ones on the market. It is better than its other opponents in the same price range in many ways.

Whether you want to upgrade your gear with a new angle grinder or you are buying your first one this model is great.

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