Dewalt DWE4120 Grinder Review: The Good & Bad

Among the key players in the power tool industry, there’s DeWalt. The company offers a wide range of products from power drills, saws, pneumatic tools, to – you guess it – angle grinders.

In this DeWalt DWE4120 review, we’ll show you one of the best 4-½-inch angle grinders that you can find on the market at the moment. Compact, capable, and has a fairly decent price to boot, the DWE4120 grinder can be an attractive choice for professionals and amateurs alike.

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About DeWalt Angle Grinders

Since its founding in 1922, DeWalt has maintained its top position in the angle grinder industry. The company’s portfolio has angle grinders of various sizes, styles, performance levels, and prices. Thanks to the diversity of its offerings, the company can cater to just about anyone from professionals to DIY-ers and residential users.

If you’re looking for a new angle grinder, there’s a good chance that DeWalt grinder has something in its catalog that’s just right for you.

DeWalt DWE4120 Review: Key Features

Robust 1.5-Horsepower, 9-Amp Electric Motor

DeWalt DWE4120 features

Packed inside the DWE4120 is a robust 9-amp motor. The motor can produce 1.5 HPs in total and is capable of delivering a no-load speed of 12,000 RPM.

For such a small angle grinder, this kind of performance is truly impressive. The DWE4120 will be able to handle medium to heavy-duty cutting tasks, such as cutting metal sheets.

According to DeWalt, the motor is designed to operate at low temperatures even while under load. As far as I have seen, this is an accurate claim. Even when the motor is put under heavy strain as it cuts thick metal, the grinder still remains relatively cool. 

When the stress becomes too great, an overload protection mechanism can kick in to shut down the motor and protect it from damage.

Though it delivers a lot of power, the motor is very noisy. If you’re going to work with this angle grinder for long periods, make sure to wear your earmuffs.

⅝-11-inch Spindle Thread with Quick-Change™ Design

The ⅝-11-inch spindle thread can accept 4 ½-inch grinding wheels and accessories. Like every other DeWalt angle grinders, the spindle thread supports rapid wheel change. This feature will come in handy if you work regularly with the grinder and burn through grinding wheels quickly.

In addition to the spindle thread, DeWalt has made wheel change a lot easier and more convenient with the addition of their Quick-Change™ design. You can remove and replace the wheel without any tool.

DeWalt DWE4120 spindle

Flexible AC/DC Power

The DeWalt 4120 angle grinder can be made to work using either AC or DC power. There’s a small button to the side that you can use to switch back and forth between the two power modes. This feature further improves the versatility of this angle grinder.

You never know what sort of power you’d get when you plug it into an outlet at the job site. This small, yet incredibly handy button can help your angle grinder to work no matter what the current is like.

Large Paddle Switch

Like most angle grinders on the market, the DWE4120 is activated using a paddle switch at the bottom. DeWalt has designed this grinder with a large switch, which makes it more convenient and comfortable for the operator to press and hold.

The paddle switch can be locked into place with one click for sustained operation.

Lightweight, Low-Profile Design

One of the greatest things about this model is that it has a very compact body design. Notably, the gear housing at the front comes with a special low-profile shape. If you have to work in tight spaces such as attics or basements, the DeWalt grinder DWE4120 can follow you with little trouble.

The tool is also measured at 5 pounds, which is very light for a grinder with this sort of performance.

DeWalt DWE4120 reviews

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Rugged Body Design

The DeWalt DWE4120 has a very rugged body design. Its main body is cast from impact-resistant plastic. The frontal housing is cast from a mixture of plastic and metal parts. Together, they form a very strong machine that can withstand the harsh environment of job sites.

DeWalt is known in the market for their high-quality control. So, the build quality of every unit is expected to be high.

Slim, Ambidextrous Side Handle

The side handle is sleek, which will be more comfortable for you to hold onto if you work for long periods compared to larger handles. It’s also ambidextrous. Depending on whether you’re left or right-handed, you can remove and reinstall the handle to either side of the angle grinder to suit.

You can check the manual for more information on how to adjust the handle.

Metal Alloy Guard

Over the grinding wheel, there is a blade guard made from metal alloy. Besides protecting the wheel from the environment, it will also protect you from injuries if something was to happen to the blade. The guard functions as a spark deflector, too.

It is completely adjustable and can be rotated 360°.

6-inch Power Cord

The power cord, unfortunately, is quite short. This is one of the very few cons that I found with this particular model. If you need some extra range, you will have to resort to using extension cords.

What I Like About Dewalt DWE4120

  • Powerful performance with 9-amp motor
  • AC/DC power
  • Flexible spindle thread that supports quick wheel change
  • Comfortable, lightweight, and compact design
  • Rugged body design

What I Don’t Like About Dewalt DWE4120

  • The power cord is too short
  • Doesn’t have variable speed
  • Noisy

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Review Summary

To conclude this DeWalt DWE4120 review, I have found this model to be excellent for its size and for the money. Hidden inside of a compact, lightweight design is quite a lot of cutting power that I think can satisfy even professional users.

DeWalt has also thoughtfully included many ergonomics features like a slim, adjustable side handle and extra-large paddle switch. While small, these features provide an excellent user experience. 

Last but not least, all of the safety features like overload protection and metal alloy guard make this a safe purchase for beginners.

And while the grinder is without flaws, none of them are deal-breakers.

For all of these reasons, I would recommend the DWE4120 to both amateur and professional users alike. It’s definitely one of the best angle grinders on the market at the moment.

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