Can You Use An Angle Grinder To Sand Concrete?

Did you know that high-quality angle grinders can slice through various kinds of challenging and stiff material? Their build and construction can chop off almost everything with perfect ease.

However, when it comes to sanding concrete with angle grinders, you might have to take a gander at a few of the pros and cons and terms of usage. Let’s get real; you can’t start grinding down such a sturdy material right off the bat.

Don’t fret yet. With our comprehensive research on smoothing rough concrete, we can assist you with many helpful tips and tricks. Let’s see how to utilize these lifesavers safely and with precision.

How To Grind Concrete With Angle Grinder

This section will talk about how to sand concrete smoothly with the assurance of an optimized smoothed surface and finish. But, before we begin, let’s see what tools you might need to complete this task fruitfully.

  • Cleaning Supplies – You can keep a broom, mop, or vacuum ready to use, nearby your workspace.
  • Safety Gear – You must wear good goggles, masks, and clothes to be on the safest side. If you’re working with floors, wearing knee pads has great benefits too.
  • Angle Grinder – Generally, it is recommended to opt for four to seven inches worth of diameter for the blades. You also need to shroud, dust, and polish the materials.

Now that we know what materials are required to get the ball rolling let’s get to the action. Follow the step illustrated below to understand how to use an angle grinder on concrete and complete the task.

1. Clean The Spot

First and foremost, you must clean the concrete platform that you plan to work with. If there are any evident stains, grease, or bumps of the concrete, you can use a broom to clean it off or vacuum the area for optimum results.

2. Start With The Angle Grinder

When grinding concrete with angle grinders, it’s better to divide the platform into specific sections. Since you will have to move around a lot, this will add more control to your work area. You can also utilize dust shrouds to minimize pollution and dust issues.

Mount the wheels of the angle grinder and the diamond polishing pad. Get ready and wear all the recommended safety gear and plug in the machine to an electrical outlet.

3. The Grinding

This step involves smoothing concrete with angle grinders, including the tricky parts such as the corners. If you face great difficulty achieving the desired smoothness on the corners, you can opt for a smaller device.

Dividing the concrete into four sections can also be of increased advantage on your end to smooth out the surface.

4. Last-Minute Fixes –

As you’re done with grinding the surface, you should skim the outcome. If you find an imperfect spot, you can go ahead and grind that section one more time. However, before you grind any section for a second time, ensure to dust-free the device. Lastly, once you’re happy with the results, vacuum or mop the surface.

How To Grind 1 Inch Of Concrete:

When you’re dealing with an inch’s worth of concrete to grind, you can go around it in two ways. First, there’s the hand-held concrete grinder or the walk-behind concrete grinder. Allow us to demonstrate both for your ease of use.

Hand-Held Concrete Grinder

This technique is perfect for smaller projects. Moreover, it’s made to be in sync with tight surfaces and industrial works. Generally, the grinding disc of hand-held grinders is 5-12 inches. There are multiple sizes available for hand-held grinders, with a bonus of optimized dust control. Both corded and cordless grinders can be used on wet and dry surfaces.

Walk-Behind Concrete Grinder

Walk-behind grinder options are far more powerful and can deliver multiple speed options. You can choose between single-disc or even four-disc models. The best specification about walk-behind grinders is that they can provide spotless results in small, restricted, and large areas, too, with just a few tweaks in the disc size. This means faster work modes and higher possibilities of covering all kinds of workspace.

How To Smooth Rough Concrete Floor:

To work out the majority of the imperfections on an irregular concrete surface, you need to hold the grinder as flat as possible so that more of the grinding disc comes into contact with the concrete. Keep working on the imperfections until they have been completely smoothed out.

Your questions regarding how to smooth concrete floors should disappear if you begin with a flexible course disc and a smaller surface. The same rule applies to polishing concrete with angle grinders. This technique is also used to eradicate adhesives, paint, and stains. Smoothing and polishing concrete perfectly can be achieved through seamless gliding of the angle grinders.

Best Concrete Sanding Disc For Angle Grinder:

The grinding discs are crucial components whether you’re an expert or an occasional DIY-er. These discs are the main element that will cut through the concrete with ease due to their abrasive nature. These abrasive grains make up a more significant portion of their functionality, and without these grits, you might as well never experience the best way to grind down concrete.

Therefore, selecting the right disc for your angle grinder is vital. Luckily, I have a few discs to recommend that can deliver top-tier results.

1. SUNJOYCO 4″ Concrete Grinding Wheel

The Sunjoyco sanding discs for concrete come in 4 sizes for more excellent usability. Its unparalleled durability and fast-cutting action are truly unmatched. The high diamond concentration focuses on chopping concrete, stone, or masonry seamlessly. Moreover, the hole design features higher cooling aid and reduces wear.

Therefore, selecting the right disc for your angle grinder is vital. Luckily, I have a few discs to recommend that can deliver top-tier results.


  • Bang for the buck
  • Easy to remove
  • Sturdy and durable
  • Great adhesion


  • Might face trouble with the fit

2. HRLORKC 4-Inch Angle Grinder Wheels

The best feature of these heavy-duty concrete polishing discs has to be the heat-treated cup design. Its long-life capabilities come from the 4-inch grinding wheels and 12 segs heavy duty made with top-notch materials. Furthermore, the robust construction also promotes smooth grinds and cuts on rock, concrete, tile, and marble. You can use it on both wet and dry surfaces to fieldstone or smoothen out concrete.


  • Long-lasting
  • Extremely sturdy and durable
  • Easy to use
  • High value for money


  • It doesn’t work well with epoxy paint

Best Angle Grinder For Grinding Concrete:

There are a few vital elements about a concrete angle grinder that can’t go amiss while you’re purchasing one. Grinding concrete floors isn’t mere child’s play. Thus, whether you’re an amateur or a professional, mastering this skill will take time but, more importantly, the right tool as well. You must consider the grinder’s size, comfort, ergonomic features, efficiency, and functionality.

Worry not; to minimize your struggle in finding the right match; I have gathered three of the best angle grinder for concrete floors to recommend. Check them out!

1. AVID POWER Angle Grinder

If you need a powerful grinding machine, look no further as this Avid grinder comes in 7.5amps, 900W and 11000 RPM. It has an exquisite ergonomic design that is slim and lightweight for fatigue reduction and heightened comfort.

Users love the convenient and seamless operation due to the quick and easy abrasive grinder wheels and spindle lock. Not only does this piece have high usability but, it optimizes safety necessities for the users too.


  • Quick heat dissipation
  • Lightweight and compact
  • Safety triggers
  • Easy one-hand operation


  • A bit noisy

2. Metabo US606467800 Concrete Renovation Grinder

The most catchy feature of the Metabo is that due to its high safety standards, it prevents unintentional start-ups. This twist-proof tool also comes with an adjustable guard. The side handle will intuitively lessen the vibrations while in use. Moreover, this high safety tool can be altered into three positions for more excellent usability and ease.


  • High safety
  • Ease of use
  • Great suction power


  • The grinder setup could be better

3. BOSCH CSG15 5-Inch Concrete Surfacing Grinder

The Bosch angle grinder concrete grinding comes in three styles and prices, stretching your options even more. It has high torque that can handle sustained loads to maximum capacity, unlike any other alternatives. Moreover, the four-stage dust intrusion seal on this is a God sent in minimizing and controlling pollution. Its new guard system comes in 12.5 amp power and a corded electrical power source.


  • Three styles
  • Great dust control
  • Easy to use


  • The wheel cup tends to come off


Can You Wet Grind Concrete With An Angle Grinder?​

I don’t recommend it. Electricity and water do not pair well together, so if you plan on using a grinder or sand paper be very careful not to get any of these fluids in your machine! If that’s what you want then an abrasive pad will allow for roughing up the surface without too much smoothness which would ruin its look when finished with concrete pavement needs more work before being installed.

Can You Cut A Concrete Sidewalk With An Angle Grinder?

I don’t recommend it. You could but you would need to use a diamond dry run blade. It’s easier and more convenient than renting the cement cutting machine, so I recommend that option for most people who want their projects done on time!

Final Words:

So, have we addressed all your confusion on how to grind concrete smooth? We hope so!

Angle grinders are pretty much the best tool to take care of this job, even for a DIY-er. Professionals and DIY enthusiasts have seen excellent results with these, especially on modest workspace. However, achieving the most remarkable results while grinding concrete floors depends on what tool you use and how. If you can keep the necessities, requirements, and functions in check, you’re good to go!

About the Author

Jacob Wilson

Hi there! This is Jacob Wilson, a power tool enthusiast. I usually spend the majority of my time working on construction sites. Drilling, sawing, and sanding are in my blood, which is why I always love to work on power tools.

But when I ain’t working on sites, you can find me putting my fingers on keyboards in terms of researching a variety of power tools as this is what I’m so passionate about!


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