Angle Grinder

Is the material you are working with at your job or when you are involved with DIY projects at home metal? Then the abrasive wheel featured by the all so popular tool known as the side grinder is what you need as it will allow you to shear through the material. Perfect for tasks like de-burring, cutting, and brushing metal pieces, these versatile tools are important for handymen.

Woefully, it can seem daunting that there is an absurd collection of products out there to choose from, this high competitiveness and variety making your life harder when trying to settle for a certain option. For this reason, we have rounded up the top grinders we consider as being the best after performing thorough searches and multiple tests, narrowing down your search and maybe even helping you find the right tool.

Top 5 Angle Grinders Comparison

1. Bosch GWS18V-50 2. Makita GA7021 3. Metabo W9-115 4. DeWalt DWE402 5. Makita 9557PBX1
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Technical Details

General Info
Manufacturer Bosch Makita Metabo DeWalt Makita
Dimensions 11″ L x 5″ W x 3.6″ H 18.6″ L x 7.8″ W x 5.5″ H N/A 15.6″ L x 5.9″ W x 4.8″ H 10.75″ L
Weight 3.2 Lbs 10.4 Lbs 4.6 Lbs 6.2 Lbs 4.5 Lbs
Technical Specifications
Power Type Cordless Corded Corded Corded Corded
Motor Four-Brush Motor 15 Amps 8.5 Amps 11 Amps 7.5 Amps
Output Power N/A 2750W 510W 1400W N/A
Cable Length 8′ 8′ 6′ 8′
Grinding Wheel Diameter 5″ 7″ 4.5″ 4.5″ 4.5″
No Load Speed 10000 RPM 6000 RPM 10500 RPM 11000 RPM 11000 RPM
Spindle Thread Size 5/8″ – 11 5/8″ – 11 UNC 5/8″ – 11 UNC 5/8″ – 11 5/8″ – 11 UNC


Variable Speed Control
Overload Protection
Adjustable Handle Position N/A
Tool-Free Guard Adjustment
Other Features Vibration Control Side Handle Rear Trigger Handle Switch 7 Locking Positions One-Touch Guard Rotatable Gear Housing
Restart Protection AC/DC Switch S-Automatic Safety Slip Clutch Top Mounted Spindle Lock Button AC/DC Switch
Burst-Resistant Wheel Guard Rubberized Back Handle Rotatable Gear Housing Safety Lock-Off Paddle Switch Lock-On/Off
Electronic Cell and Motor Protection Spiral Bevel Gears Dust Ejection System Paddle Switch
Spindle Lock Dust-Proof Bearing Vibration Control Side Handle Thick Coil Wires
Powered by 18V Lithium-Ion Battery Rotatable Gear Housing


Product Warranty 3-Year Tool Protection, 2-Year Battery Replacement 1 Year 3 Years 3 Years 1 Year
User Manual
Customer Support
Telephone Support 49-711-400-40990 1-800-462-5482 1-800-638-2264 1-800-462-5482
Online Chat Support

Grinder Operation and Wheel Uses According to Type

A handheld power tool that is easy to use and works due to an electricity-powered spinning disc, the angle grinder is a common finding in the tool collection of handymen, construction workers, those who work in auto garages, and so on. To use it, all you need to do is depress a switch, grip it firmly to avoid any incidents from happening, and perform the task at hand. To turn the power tool off, simply let go of the switch.

Designed for cutting a variety of materials, including stone, metal, pavers, stucco, and so on, it is a tool you will quickly become reliant on in your day-to-day activities. As you will notice when more thoroughly researching this market, there is a wide variety in terms of wheel material as each type is best suited for certain tasks.

Aluminum oxide wheels are ideal for cut-offs, buffing, woodworking, polishing, and cutting rods, bolts, and bars. Fiber wheels should be used when removing burrs or rust from metal pieces. Silicon carbide wheels are best used for rounding and sharpening metal, as well as removing mortar. Flapper wheels are intended for use when sharpening tools, restoring edges, prepping surfaces, and sanding. Diamond wheels should be used when cutting tough materials like stone, concrete, and tile. Last but not least, wire wheels are ideal for removing rust and paint, and for cleaning metal pieces.

Noteworthy Features and Specs for an Informed Purchase

Even if you are a handy person and you know your way around power tool, your natural knack does not guarantee you will always make the best choices when you go shopping. To completely eliminate the possibility of making any mistakes when purchasing a side grinder, it is essential that you look into a few specs and features boasted by these tools. In the following, we will present you with a useful buying guide under the form of a table, a guide we recommend you closely pay attention to if perfection is what you strive for.

Spec/Feature Importance
Grinding Wheel Size The first element we advise you look into when making the purchase is the diameter of the grinding wheel featured by the tool as it shows what is the power offered by the motor and for what type of jobs it is intended. Commonly found grinding wheel sizes range from 4.5 inches to 9 inches, the smaller diameter wheels being best suited for small jobs, while bigger diameter wheels are intended for larger jobs. Thus, to make the right purchase, take into consideration the type of projects you need to use the grinder for.
Motor – Amperage and Power Each of these power tools features a different type of motor, thus offering certain amp and power ratings. What you will most likely come across in terms of amperage is a range from 4 to 15, while when it comes to motor output power rating, it generally ranges from 500 to 2500 watts. Lower ratings indicate the tool should be used for small projects around the house, while higher ratings show the grinder can be used in big projects at auto garages, construction sites, and so on.
Revolutions per Minute Rating The revolutions per minute or RPM rating indicates how powerful the tool is, and obviously, for what type of projects you can use it. Higher RPM ratings indicate you are dealing with a powerful and reliable grinder for heavy-duty use on large projects, while lower ratings show the power tool is better suited for household use. Just be aware of the fact that higher revolutions per minute increase the risk of injury when the tool is not used correctly as well, so extra caution is recommended. We advise you to make your choice in terms of RPM rating depending on the use you intend for the grinder.
Compact Design Obviously, the design this power tool boasts directly affects how convenient it is to use and how comfortable you will handle it. Considering you will most likely use it often, it is important to take comfort in use into consideration. A smaller and more compact grinder translates to ease of use for long periods of time, a desirable trait especially for those who work in construction or auto garages as they are reliant on the tool most of the day.
Vibration Output Just like the design of the power tool, the vibration output it delivers is important as it shows how comfortable the grinder feels during use. Also, it is a good indicator of how long you will be able to use it without feeling your hands get tired. The lower the vibration output the better, so we recommend you take this aspect seriously into consideration if you know you need to use the power tool for long periods on a regular basis.

Situations Where the Side Grinder Is Needed

Although the name is quite deceiving as it leads you to think there is only one purpose the tool serves, in reality, it does a lot more than you could imagine. Used for a variety of tasks, the angle grinder is a tool you will become dependent on using. In the following, we will show you a few of the important purposes this tool can fulfill, so stick with us if you want to learn more about it.

  • The most common use of the tool is sanding or grinding away excess or unwanted metal or stone. An often encounter in construction sites, workers need the tool to make notches or cuts. You most likely need the power tool to perform these tasks, but there are other uses for it as well, as you will find out immediately.
  • Aside from the common and obvious tasks you will use the side grinder for, it can be used to sharpen gardening tools and other tools you use around the house. Secure the blades to the work table by tightly clamping them for no unpleasant incidents to occur, and you can proceed to sharpen tools like axes, shovels, hatches, the blades of the lawnmower, and so on.
  • Another surprising use of the disc grinder is removing mortar. If you attach a diamond tuck-pointing wheel to the tool, you can remove old, loose mortar with it, all without risking damage being done to the brick. Strenuous labor is avoided this way as you will not be dependent on using the hammer or chisel anymore.

How We Rated Our Top Picks – In-Depth Look at What Makes a Quality Side Grinder

Ranking the best disc grinders at the moment was not an easy task as we had to take quite a few considerations into account to ensure we will present you with exceptionally performing power tools you will benefit from for years on end. To clarify what determined us to rate and rank the products in the manner we did, thus helping you better appreciate each and every single one of these top disc grinders, we will present you with an in-depth analysis of the rating process. Thus, stick with us until the end of this article section to learn interesting info on how a quality side grinder looks like.

  • Type – Corded or Cordless?

    There are two types of side grinders you will come across in terms of power type – corded and cordless models. Both boast their own set of advantages, cordless models being a lot more portable and convenient to work with as they allow freedom of movement, while corded models providing continuous operation as long as there is no power outage. We gave the Bosch GWS18V-50 grinder a higher score when it came down to this rating element as its cordless design makes it more convenient to use when performing grinding or polishing tasks on workpieces, thus making your life a bit easier as you are working.

  • Motor – Amperage and Power

    The motor amperage and power ratings show how powerful the grinder is and for what type of projects it is intended. When it came down to this part of our ranking process, the model we gave the most points to was the Makita GA7021. It boasts a high amperage of 15 amps and a power rating of 2750 watts, featuring what is undeniably the most powerful motor of all these 5 side grinders.

  • Length of the Power Cable

    Four of our selections are corded, so we had to take into consideration the length of their power cables as this spec shows how convenient to use the grinders are. The longer the cable the better as you are able to roam around the shop freely from one workpiece to another with the tool in your hands, without having to change the power outlets you plug them in. The Makita GA7021, Metabo W9-115, and Makita 9557PBX1 are the winners when it comes to cable length as all three disc grinders feature 8-foot long power cords.

  • Disc Diameter

    The diameter of the disc shows what size projects the side grinder is appropriate to use for. Smaller diameters are better suited for small projects, while bigger diameters show the tool can be confidently used for large projects. We gave the Makita GA7021 a better rating when it came to grinding wheel size as the 7-inch diameter of the disc allow you to use it on large workpieces.

  • No Load Revolutions per Minute Speed

    Another great indicator of the power of the tool is the no-load speed RPM rating. The two grinders we gave extra points to as they deliver more revolutions per minute, thus being more powerful, are the DeWalt DWE402 and the Makita 9557PBX1, both featuring an exceptional no-load speed of 11000 revolutions per minute.

  • Overload Protection

    The presence of the overload protection feature indicates the disc grinder is not in danger of over soliciting its motor and damaging it beyond repair as it will automatically stop operating when the situation heats up. All of the grinders featured in our top come with this feature as we had to take your best interest into consideration and make sure we recommend only products you will actually use for a long period of time, not power tools that would have ended up unusable after a few months.

  • Vibration Control

    Having control over the vibration output of the power tool is essential as it shows you will be able to work with the power tool for hours on end without feeling fatigue. The Bosch GWS18V-50 and the DeWalt DWE402 are the two grinders we had to give extra points to as they both come with this convenient feature, enabling prolonged use without any consequences when it comes to the way you feel at the end of the day.

  • Warranty Length

    Of course, we had to take into account the length of the warranty for each angle grinder as it shows for how long the tools will be fixed or replaced free of charge by the manufacturing company in case defects or malfunctions appear. Three of the disc grinders took the whole glory when it came to this rating element as they all come accompanied by a 3-year warranty, more precisely the number one placed Bosch GWS18V-50, the Metabo W9-115, and the DeWalt DWE402.

Frequently Asked Questions

?Do I need different types of guards when using the tool for grinding and cutting?
It is indeed recommended to use specific types of guards for specific activities. For example, when you are cutting off pieces, you should use a guard that covers both sides of the wheel. On the other hand, when using the tool for grinding purposes, you should use an open guard.

?What types of wheels can I attach to the side grinder?
To this power tool, you can attach aluminum oxide wheels, silicon carbide wheels, fiber wheels, wire wheels, flapper wheels, or diamond wheels. Each of these wheels is specially designed to perfectly fulfill a certain purpose, and in a previous section of the article, we have described the use for each wheel type.

?Can I use the disc grinder to remove excess material from a metal workpiece?
Yes, you can. There are two main uses for the disc grinder – to remove excess material from pieces and to cut into metal pieces. Of course, the manner in which this task will undergo depends on the material the wheel disc is made from, as it can affect the speed at which you work and the convenience of the task itself.

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