A concrete grinder is a tool used for leveling and grinding a concrete surface to give it a smoothened finish. You can use a concrete grinder to prepare a concrete surface, remove paint or any other coating from a concrete surface, or polish a concrete surface.
A typical concrete grinder comprises of a head with an abrasive disc that rotates to grind concrete. The abrasive disc is often known as a diamond or grinding wheel/attachment. Grinding wheels come in different sizes.
The number of grits determines the size of a grinding wheel. Larger grinding wheels are ideal for aggressive removal of coatings on concrete whereas smaller grinding wheels are ideal for polishing. Another important component of a concrete grinder is known as a bond. The bond holds the grinding wheel in place.
Concrete grinders come in two main types, including handheld and walk-behind concrete grinders. Handheld grinders are compact and ideal for grinding corners and other tight areas. Walk-behind grinders are large and ideal for grinding wide and more accessible concrete surfaces.
While concrete grinders are essential tools in finishing concrete surfaces, choosing the wrong tool can make the work more challenging. Thus, it’s important to choose the right concrete grinder for a perfect finishing. Here’re the best concrete grinders, including their features and detailed reviews.
Top 10 Concrete Grinders
#1. Bosch 4-1/2-Inch Angle Grinder
This angle grinder from Bosch is specially designed for concrete grinding and other applications that require a compact grinder such as pipe fitting and metal fabrication. It’s packed with numerous desirable features that made us rank it as the top concrete grinder on our list.
To start with, this grinder comes with a powerful 6-ampere motor that delivers enough power for most concrete grinding jobs. It’s extremely compact yet powerful enough to deliver a speed of 11,000 RPM. The motor operates within a small field in terms of diameter, thereby allowing for a compact grinder design.
The grinder comes with an auxiliary handle that is movable between two positions. Either position makes it possible to angle the tool in a way that allows for maximum control and comfort. The grinder also features a lock-on power button close to the handle for easier turning on or off.
Another top feature that comes with this grinder is its spindle lock that makes it easier and faster to change the grinding wheels. It also features field windings that protect its interior components from dust and debris when grinding concrete. Besides, it also features a burst-protection guard that keeps you protected from injury in case the grinding wheel comes off accidentally when grinding.
#2. Makita GA4530 4-1/2-Inch Angle Grinder
Makita is one of the leading manufacturers of power tools. Its GA4530 angle grinder is one of the most reliable grinders for grinding concrete and other grinding applications. It’s ideal for use by both professional contractors and home use.
Although it looks compact and small in size, it comes with a powerful 6-ampere motor that generates a speed of 11,000 RPM. This makes it ideal for handling most grinding projects. Its components are protected by a metallic housing for enhanced durability in the harsh concrete environment. Its labyrinth design keeps the motor protected from debris for prolonged life of the grinder.
Its barrel grip has a circumference of 2¼ inches, thereby allowing for a comfortable grip. Besides, the side handle is positioned at a comfortable angle for increased control of the tool when grinding. In addition, the side handle can be adjusted between to different position for more comfortable use.
Another top feature of this grinder is its lightweight nature. It only weighs 4 pounds. As such, you’ll find it less fatiguing to use for a big grinding project.
#3. DEWALT DCG414T2
This concrete grinder comes packed with a lot of power that makes it possible to grind even the toughest concrete surfaces. It’s battery-powered for enhanced portability. You won’t have to struggle with power cables and insufficient sockets when grinding. That way, you can use it in a remote area that doesn’t have a socket, especially when working on outdoor concrete surfaces. You’ll only need to recharge the battery once it runs out.
Its powerful motor delivers a total speed of 9,000 RPM. This makes it one of the most powerful battery-powered concrete grinders. Its battery system uses an innovative technology that changes its voltage supply level from between 60 volts to 120 volts depending on the attached grinding wheel.
Another top feature that comes with this tool is its fast braking system. Standard grinding wheels stop spinning within seconds, making it faster to change the wheels. In case a stall is detected, the grinder’s system activates the clutch automatically to shut down the motor to prevent any damages.
The grinder works with wheels measuring 4½ to 6 inches. Thus, you can switch between wheels of different diameters depending on the concrete grinding job you’re doing.
#4. CRAFTSMAN Small Angle Grinder Tool
This angle grinder from CRAFTSMAN is one of the most reliable grinders available today for demanding concrete grinding applications. Although it looks small in size, it’s packed with a lot of power. It features an efficient 6-ampere motor that delivers a speed of 12,000 RPM. Its massive power will allow you to finish a huge and demanding concrete grinding project more quickly.
The grinder comes with a three-position handle. You can hold it between three different positions for enhanced control and versatility depending on the grinding application. Additionally, the handle has a countered molding for enhanced comfort. You’ll find it less fatiguing to hold the grinder for a prolonged period.
Another top feature that comes with this grinder is its spindle lock mechanism that makes it easier and quicker to change grinding wheels. Additionally, its power switch is strategically positioned at the side. The power switch is positioned in such a way that you can’t turn it off accidentally when operating the tool. Besides, the switch locks in place when sliding it on and off for easier operation.
#5. QuickT SPW702A Concrete Countertop
Another top quality concrete grinder is the QuickT grinder. It’s specially made for grinding and polishing concrete, marble, tile, and granite surfaces. You can use it for wet sanding, wet polishing, and wet grinding.
It comes with a powerful motor that operates at 800 watts. It has a variable dial that makes it possible to change the speed of the motor. That way, you can change the speed depending on the kind of grinding application at hand.
The concrete grinder comes with a complete set of grinding wheels that are ideal for different grinding applications. The provided grinding wheels include concrete grinding pads, pads for polishing tile edges, and pads for polishing granite countertops.
The grinder comes with an inbuilt water line that can be connected to a hose for water supply when wet grinding. It has a water pressure control feature for regulating the water pressure accordingly. It also features a three-hole watering point that distributes water evenly on the surface being worked on.
The grinder comes with a top-handle for easier control when polishing concrete. The top-handle design makes it possible to apply light pressure on the surface for smooth polishing.
#6. Stadea SWP101K Stone Wet Polisher
Stadea has designed this concrete grinder with reliability, efficiency, and usability in mind. It’s packed with several desirable features and functionalities that would make you want to consider it. For instance, it features a heavy-duty design that makes it possible to transfer more weight on the concrete surface you’re polishing.
It’s designed to allow more weight on the head area and less weight on the back handle area. That way, you’ll find it less fatiguing to hold the tool for a prolonged period. The handle is also designed in a way that allows for a more comfortable grip.
The grinder comes with a powerful motor that has a power rating of 800 watts. You can take advantage of the variable dial to change to the motor speed depending on kind of concrete grinding and polishing you want.
You can use the grinder for wet grinding. You can connect a regular water hose to the grinder for water supply when wet grinding. The grinder comes with a splash guard that controls how water is splashed. The water line is positioned in such a way that it doesn’t interfere with the polishing process. The grinder also features a water pressure control mechanism for adjusting the water flow and stopping the flow when the grinder is running.
#7. Metabo US606467800 Concrete Renovation Grinder
Metabo is one of the most popular manufacturers of power tools. Its US606467800 handheld concrete grinder boasts of having numerous features worth discussing. It comes with an extremely powerful 15-ampere motor with a power rating of 2400 watts.
The grinder comes with a safety switch that prevents accidental startup. This will protect you from getting injured. Another top feature that comes with the grinder its adjustable guard. You can adjust the guard without using any tool, making it more user-friendly to adjust.
Additionally, the top handle is designed in such a way that you can hold it without experiencing a lot of vibration. Thus, it’s less fatiguing to hold when grinding continuously for a prolonged period.
Besides, the top handle can be swiveled to the most comfortable handle and enhanced handling when grinding. This also makes it safer to use. Moreover, you can position the rear handle in three different angles for enhanced control.
#8. KIMO 20V Brushless Cordless Angle Grinder
This battery-powered angle grinder is specially designed with versatility in mind. You can use it to grind concrete, stone, tile, steel, and wood. Its motor produces a maximum speed of 9,000 RPM, which is fast enough for most concrete grinding jobs.
The rechargeable battery that comes with the grinder is made to last long. Its cells are made using the latest battery technologies for durability. It comes with a fast charger that can recharge it to full capacity within an hour.
Its rubberized handle makes it more comfortable to hold the grinder. Besides, the handle can be positioned on two different angles for enhanced control over the grinder.
The grinder comes with a ventilation system that allows the motor to power the tool for a prolonged period without overheating. The brushless design of the grinder allows the motor to work with reduced friction, thereby preventing it from overheating.
The motor also comes with an overcurrent protection that prevents it from burning out. It also comes with a metallic wheel guard that makes the grinder safer to operate.
#9. Stadea SWP108K Wet Stone Grinder
This is yet another reliable concrete grinder from Stadea. The grinder features a simple operating mechanism that makes it easier to change the variable motor speed. You’ll simply adjust the speed dial located in front of the handle to change the speed. It operates on a speed of between 700 to 3,000 RPM.
You can use the grinder for wet grinding, thanks to its three-hole water line that is strategically positioned to water the concrete surface without interfering with the grinding process. Each of the three holes distributes water at an angle of 120 degrees for more even water distribution.
The grinder also comes with a mechanism that prevents electrical shock when wet grinding. It’s able to cut off power in the event of an electrical shock. It also comes with double insulation for enhanced safety against electrical hazard.
#10. DAMO Variable Speed Concrete Polisher Grinder
DAMO-1257 concrete grinder comes with innovative features that allow for enhanced performance. It comes with a 7-ampere motor that delivers a variable speed of 700 to 3,000 RPM. You can use the speed control switch to change the speed as needed.
The grinder comes with a hose adapter that makes it easier to connect a garden hose or faucet for wet grinding. It also comes with a water valve for regulating the water pressure. The grinder also comes with a splash guard that prevents water from splashing into the motor.
Additionally, this grinder comes with a top handle and a side handle for enhanced control of the tool when grinding. The handles are designed for a comfortable grip, thanks to their soft rubber covering. Thus, you can hold the tool for a prolonged time without feeling fatigued.
Frequently Asked Questions
How much material can you remove with a concrete grinder?
The amount of material that a concrete grinder can remove depends on the grit size of the grinding attachment/wheel.
How do I choose a grinding wheel attachment for my concrete grinder?
The kind of grinding wheel you choose depends on the kind of finishing you want. If you want coarse grinding, then choose a grinding wheel with a lower grit number. On the other hand, if you want to polish concrete, then choose a grinding wheel with a higher grit number.
Can I use a concrete grinder to remove paint from my concrete floor?
Yes, you can. Just make sure the grinding wheel you’re using is meant for removing paint.
Can I remove glue from a concrete surface with a concrete grinder?
Yes. A concrete grinder is ideal for removing glue and other adhesives from a concrete surface.
What’s better between a wet and a dry concrete grinder?
A wet concrete grinder prevents dust and reduces friction when grinding. However, wet grinding leaves a slurry paste that requires cleaning up after grinding. A wet concrete grinder also requires water supply and can be challenging to use in an area where a water connection point is challenging to access. On the other hand, a dry concrete grinder leaves a shinier finishing and doesn’t require water and much cleanup after grinding. Overall, your choice should be based on your personal preferences.
A concrete grinder is a must-have tool for a professional concrete contractor or any DIY concreting enthusiast. The ideal concrete grinder should have all the desirable features and functionalities you want. It should be efficient and reliable.
We hope that our reviews will assist you in finding the best concrete grinder for all your concrete grinding needs.
- Top 10 Concrete Grinders
- #1. Bosch 4-1/2-Inch Angle Grinder
- #2. Makita GA4530 4-1/2-Inch Angle Grinder
- #3. DEWALT DCG414T2
- #4. CRAFTSMAN Small Angle Grinder Tool
- #5. QuickT SPW702A Concrete Countertop
- #6. Stadea SWP101K Stone Wet Polisher
- #7. Metabo US606467800 Concrete Renovation Grinder
- #8. KIMO 20V Brushless Cordless Angle Grinder
- #9. Stadea SWP108K Wet Stone Grinder
- #10. DAMO Variable Speed Concrete Polisher Grinder