Concrete Grinder 101: The Insider's Guide to Concrete Grinding

If you're in the concrete polishing or surface preparation industry, you know that having the right equipment can make all the difference. And when it comes to grinding concrete floors, a variety of machines are available to help you get the job done efficiently.

In this guide, we will walk you through the basics of concrete grinding, introduce you to different types of grinders, and share techniques, maintenance tips, and safety considerations.

Whether you're looking to level, prep, or polish a concrete surface, we've got you covered. And if you're in the market for a concrete grinder, we'll share some tips for choosing the right equipment for your needs.

Types of Concrete Grinders

When it comes to concrete grinding, choosing the right grinder is crucial to achieving the desired outcome. There are two main types of concrete grinders: planetary style grinders and multi-disc grinders.

Planetary Grinders

Planetary grinders are pretty versatile machines that can handle various tasks, from polishing to coating removal. They get their name from the way the discs are arranged in a planetary pattern. 

They have a large grinding disc that rotates in a circular motion, with smaller discs spinning in the opposite direction. The main plate of a planetary concrete floor grinder is driven by a single shaft rotating in one direction, with three smaller plates typically attached to it. These smaller plates use centrifugal force, created by the spinning of the main plate, to turn counterclockwise.

These plates have diamond abrasives attached to them, which is how they grind the concrete. Planetary technology focuses on diamond contact towards the perimeter of the machine, while the center of the machine receives none. This means that the operator needs to move the machine slowly forward, so each plate can travel the whole circumference of the machine and abrade the floor completely. If you need to work on certain floor surfaces, you need to add extra weight to the machine to force the diamonds to cut more effectively.

Multi-Disc Grinders

Multi-disc grinders use  a rotating head with multiple abrasive diamond tools to grind the surface of the concrete. These machines are ideal for removing heavy coatings, smoothing rough surfaces and flattening a floor. Multi-disc grinders are also perfect for working in tight spaces, such as corners and edges.  

WerkMaster's patented Multi-Disc Technology is an excellent example of a multi-disc grinder. It features multiple fixed-in-place individual drive shafts and plates, allowing the plates to rotate at higher RPMs than planetary grinders. The layout of the drive plates ensures the complete floor under the machine is abraded, increasing productivity. 

Plus, the grinder can be operated in any direction, providing more maneuverability in tight areas. More heads spinning at higher speeds translate into faster abrasion, reduced time, and labor. WerkMaster technology incorporates torque, speed, and advanced diamond abrasives to overcome the challenges on difficult floors. 

Watch WerkMaster in action with the Planetary vs. WerkMaster Concrete Floor Grinder video here.


Concrete Grinding Techniques

Concrete grinding techniques refer to the methods used to grind the concrete surface. Depending on the job requirements, different techniques are employed to achieve the desired results. Two commonly used techniques are dry grinding and wet grinding.

Dry grinding

Dry grinding involves using a machine equipped with a dust collector to remove the dust created during the grinding process. This is super important to keep the work area clean and free of dust, which is vital for safety and a healthy work environment. Dry grinding is often preferred for smaller jobs because it's faster and more efficient than wet grinding.

Wet grinding

Wet grinding involves using water to cool the grinding segments and aid in the surface being ground. The water helps to cut the grinding process and reduces the amount of dust created. 

Note: When it comes to choosing between dry grinding and wet grinding for your concrete surface, it's essential to consider both advantages and disadvantages of each technique. 

Factors to consider when choosing a concrete floor grinder

When you're in the market for a concrete floor grinder, there are several factors you'll want to consider to ensure you choose the right one for your needs. Let's take a look at the most critical factors:


When choosing a concrete floor grinder, it's important to consider the specific purpose of the grinder. For example, are you using it for polishing, coating removal, or surface preparation? Different grinders may be better suited for different purposes.

Type of Surface

The type of surface you'll be working on is another important factor to consider. Concrete, stone, terrazzo, and wood all require different grinding techniques and tools. Make sure to choose a grinder that is designed for the specific surface you'll be working on.

Weight or Ease of mobilization

Another factor to consider is the weight of the grinder. You'll want to choose a grinder that's easy to mobilize, especially if you'll be using it on different job sites. If it's too heavy to move around easily, it could slow down your work and make the job more complicated than it needs to be.


Edging refers to the ability of a grinder to reach tight corners and edges. If you're working on a job that requires precise edging, you'll want to choose a grinder with a smaller grinding head and adjustable edging features.


Different grinders have different electrical requirements. Consider the availability of electrical outlets and the voltage required by the grinder to determine if it will be compatible with your workspace.


When it comes to floor grinders, the price can vary greatly depending on the features and capabilities. You can find models ranging from just a few hundred dollars to several thousand. That's why it's crucial to establish a budget before making a purchase and then select a grinder that offers the features you need while staying within your budget.

Size of jobs that you will typically work on

If you typically work on smaller jobs, a smaller and less expensive grinder may be sufficient for your needs. However, if you often work on larger jobs or have a lot of square footage to cover, a larger and more powerful grinder may be necessary to get the job done efficiently. It's important to choose a grinder that can handle the size of jobs you typically work on to avoid delays and ensure that you're able to complete the work to a high standard.

Recommended read: 4 Things to Consider Before Buying Your First Concrete Floor Grinder

Maintenance of Concrete Grinders

Maintaining your concrete floor grinder is essential for ensuring its longevity and keeping it functioning at its best. Here are some tips for maintaining your concrete grinder:

Inspecting your Floor Grinder  

Regularly inspecting your floor grinder is essential to catch any issues early on. Look for signs of wear and tear, such as cracks or damage to the concrete grinder blade or diamond grinder. Also, check the condition of the concrete surface grinder to ensure it's not damaged and that the grinding wheel is aligned correctly.

Always read the manual

Before using your concrete grinder, make sure to read the manual thoroughly. This will give you important information about the specific maintenance requirements of your machine, such as recommended cleaning products and lubricants and how often you should perform maintenance.

Cleaning the machine

Cleaning your concrete floor grinder is crucial for keeping it in good condition. After each use, use a damp cloth or sponge to wipe down the machine and remove any debris, dust, or dirt that may have accumulated during the grinding process.

Replacing worn-out parts

Finally, it's essential to replace worn-out parts of your concrete grinder to avoid damage and ensure efficient operation. Look out for signs of wear and tear, such as a dull or damaged concrete grinder blade, and replace them promptly. Consider purchasing a hand-held concrete grinder or a concrete grinder for sale to ensure that you have a spare on hand.

Safety Tips for Using Concrete Grinding

Concrete grinding can be a highly effective method for leveling, preparing, and polishing concrete surfaces. However, it's important to take certain safety precautions to prevent accidents and injuries. Here are a few essential safety tips to keep in mind when using a concrete grinder:

Always Wear Personal protective equipment

When working with concrete grinders, it's important to protect yourself from flying debris and dust. Be sure to wear suitable personal protective equipment such as safety glasses, earplugs, and a dust mask.

Use a vacuum with the correct CFM

A vacuum is essential when using a concrete grinder to control dust and debris. Make sure to use a vacuum with the correct cubic feet per minute (CFM) rating for the size of the grinder you're using. This will help to ensure that the vacuum can effectively capture all the dust and debris produced during the grinding process.

Seek advice from the professionals 

If you're new to concrete grinding, it's a good idea to seek advice from experienced professionals. They can provide guidance on the best techniques and tools to use for your specific application, as well as offer tips on how to maintain your equipment for optimal performance.

Ready to take your concrete grinding skills to the next level? Enroll in WerkMaster Certified Training Schools now!

Additional tips to achieve the best results

When it comes to concrete grinding, achieving the best possible results is always the goal. Here are some additional tips to keep in mind to help you achieve those results:

Check the hardness of the floor

The hardness of the concrete floor can affect the performance of the grinder. Before starting work, use a hardness tester to check the hardness of the floor. This will help you choose the correct tooling and ensure that you're able to achieve the desired results. 

Use the correct tooling for the application

Choosing the right tooling for your concrete grinder is crucial for achieving the desired results. Make sure to use the correct tooling for the application, whether it's for coating removal, polishing, or surface preparation.

Do a sample test to dial in your system & gain clients approval

It's always a great idea to do a sample test on a small area of the floor before starting the full job. This will help you dial in your system and make any necessary adjustments. It also gives the client a chance to approve the results before you proceed with the entire project.

Keep your tools sharp

Dull tools can make the job more difficult and result in poor quality results. Make sure to keep your tools sharp and replace them as needed. This will help you achieve a smoother and more even finish.

Applications of Concrete Grinding

Concrete grinding has a wide range of applications, from leveling uneven surfaces to prepping floors for new coatings. Let's check out some of the common uses of a concrete grinder.

Leveling uneven surfaces

Uneven concrete surfaces can be a tripping hazard and can also make it difficult to install new flooring. But, a concrete grinder can easily level out the surface, making it safe to walk on. With the right tooling and technique, you can achieve a smooth, level surface in no time.

Prepping the floor

Prepping a concrete floor is essential before installing new flooring or coatings. With a concrete grinder, you can remove any old coatings or adhesives and also roughen up the surface for better adhesion. 

Removing old coatings

Tired of looking at that old, worn-out coating on your concrete floor? A concrete grinder with the right tooling can quickly remove any old coatings, leaving you with a clean, fresh surface. Whether it's paint, epoxy, or another type of coating, a concrete grinder can handle it all.

Smoothing rough surfaces

Does your concrete surface feel like sandpaper under your feet? A concrete grinder can smooth out those rough spots, leaving you with a polished, professional-looking floor. Use a hand-held concrete grinder for small areas or a concrete surface grinder for larger jobs.

Polishing concrete floors

Want to give your concrete floor a high-end, polished look? A concrete diamond grinder is the tool you need. With the right tooling and technique, you can achieve a glossy, mirror-like finish that's sure to impress. Don't forget to do a sample test to dial in your system and gain client approval before starting the job.

Watch this video to learn how to grind & polish your Concrete Garage Floor with a 110V Concrete Grinder/Polisher.


Ready to Take on Concrete Grinding?

And that, my friend, concludes our insider's guide to concrete grinding! We've covered everything from the basics of concrete grinding to different types of grinders, maintenance tips, safety considerations, and applications. You're now well on your way to becoming a concrete grinding pro. 

Remember, whether you're leveling an uneven surface, prepping a floor, removing old coatings, smoothing rough surfaces, or polishing concrete floors, there's a concrete grinder out there that's perfect for the job. Just be sure to do your research, read the manual, and follow safety guidelines to ensure a successful and safe grinding experience.

And if you have any questions or need additional support, don't hesitate to reach out to the WerkMaster team.Grow your Business with Werkmaster

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