Concrete Grinders & Polishers - What types are there? - Which one ...

Author: XMtongxue

Aug. 04, 2025

Hardware

Concrete Grinders & Polishers - What types are there? - Which one ...

Knowing your concrete grinder types — and what they are used for — is critical for successfully completing your grinding & polishing projects

There are many styles of concrete grinders to choose from and it can get both confusing and a little intimidating. Especially when trying to decide what design type is best for you and your projects.

Link to Leading Diamond Tools

This article will outline the basic types of concrete grinders on the market and address the positive (and negative) aspects of the most common machines.

MOST COMMON TYPES OF MACHINES 

  • Single head machines.
  • Dual head machines.
  • Three headed planetary grinder/polisher.
  • Four headed planetary grinder/polisher.
  • Multi-disk non-planetary grinders.
  • Variable speed and reversible machines 

Let's look at your options...
COMMON GRINDING /POLISHING MACHINE DESIGNS

SINGLE HEAD grinders

While there are exceptions, most single head machines are small and light (around 100 - 300 lbs.) 

And most will vary between 9” & 18”, run on either 110 or 220 power.

WHERE WOULD YOU USE A SINGLE HEAD MACHINE?

They are great for smaller areas that bigger machines cannot access, edges and hard-to-reach areas like small rooms, bathrooms or offices or lightweight capacity floors.

These smaller machines are also really great for taking slight ridges and high spots out of a concrete slab.  This eliminates the need for contractors to “float off” these ridges with a floor patching compound in order to prevent these imperfections from “telegraphing” or transferring through to the surface of the new material being installed. 

These machines are cost-effective, lightweight and essential. EVERY flooring contractor should have a machine like this strapped to the inside of their van. 

WHERE WOULD A SINGLE HEAD NOT BE THE BEST CHOICE?

Larger square footage projects are less suitable for a machine that has a single head, or a machine that is small and light in general. While these small machines will perform well on larger projects - the time involved (if you used a small machine only for a large area) is too great and most contractors will opt-out for a larger machine for higher productivity.

These smaller machines also wouldn't do well on floors that need grinding to a flat consistent surface, because with the smaller footprint it is difficult to get that smooth consistent cut. A larger machine like a 24” or a 32” machine will produce a much more consistently flat surface.  

DUAL HEAD MACHINES 

Dual-headed machines are great for quickly producing an aggressive CSP, (Concrete Surface Profile) - they are easy to use and cost-effective; and are a common choice for a concrete grinding machine, especially in the rental market.

A dual headed machine with the correct diamonds can produce a CSP of 2-3, maybe even a CSP of 4 (a rougher finish) on some concrete. This profile is great for most epoxies, moisture mitigation systems, and is a great “blank slate” for skim coating in preparation for sheet goods, VCT, and carpet. 

WHERE WOULD A DUAL HEADED MACHINE NOT BE A GOOD CHOICE?

These machines are typically not a good choice if you are polishing concrete, as they tend to slightly gouge the surface and fail to give the very smooth, consistent surface necessary for a good polished concrete floor that a true planetary grinder delivers. As we will see below. 

 THREE-HEADED PLANETARY GRINDER/POLISHERS 

Here is where we start to get into the larger, more versatile machines that not only grind the floor to the desired CSP but are effective concrete polishers as well.

These machines can be chain-driven, gear-driven, belt-driven, or even centrifugal-force-driven, depending on the manufacturer. 

WHAT IS A PLANETARY GRINDER?

A three-headed planetary grinder works like this... the large drum you see in the image above operates similar to a “solar system”. This drum will rotate either clockwise or counterclockwise. The three cutter heads are the “planets”. With all three headed planetary grinders - all three heads will rotate in the opposite direction of the main drum/plate,  providing an effective, consistent cut to the concrete. The heads working in opposite directions make for a machine that is balanced and comfortably controlled by the operator.

 One  difference between THREE headed machines and FOUR

As mentioned, with three-headed machines all three grinding heads rotate in the same direction. On a four-headed machine, 2 of the grinding heads rotate opposite from the other two. Think of it like this: The “North” and “South” heads will turn clockwise and the “East” and “West” heads will turn counterclockwise, resulting in a VERY smooth-running machine. 

Also — a very important point — many of these machines are VARIABLE SPEED! This allows you to run these machines slower when “cutting” the concrete, producing the desired CSP - then speed up the machine when you begin to polish the concrete.  

Another feature in most planetary grinders is that they are reversible, they will run either clockwise or counterclockwise. This is a nice feature for many reasons...

ONE. Sometimes diamonds will actually cut better and faster when you occasionally switch directions from clockwise to counterclockwise. 

TWO. When using “directional” diamonds like a lot of PCD diamonds (PCDs are man-made, big aggressive diamonds) you must run them in the direction they are designed to be used as the image below shows. And, with a reversible machine it is easy to do. 

FOUR HEADED PLANETARY GRINDER/POLISHERS

Four-headed, belt-driven planetary grinders — like the Predator grinder/polisher shown above — are considered by many to be the absolute Cadillac of concrete grinder/polishers. Why? Their effectiveness, their comfort to operate, and their utterly unrivaled ability to produce a high degree of clarity and reflection when polishing concrete.

They are (in my opinion) the best, period! This, however, is not to say that three-headed machines do not do well in this regard, they actually do very well producing a great shine and clear reflection, it’s just that a four-headed machine excels at it.  

SHOULD I BUY A THREE- OR FOUR-HEADED PLANETARY GRINDER?

So the next question immediately is... What's the difference between a four-headed and a 3 headed planetary grinder?

Three-headed planetary grinder PROs

  • Cost-effective, they cost considerably less than a four-headed machine.
  • Grinds faster, frankly, people argue over this one. But the common thought is that with a three-headed machine you have considerably more downward pressure on your diamonds making them cut faster.
    Conversely, others will say that with a four-headed machine you have more diamonds (12) cutting the floor. So four-headed machines cut faster.
    I am of the opinion as most are that, all things considered, a three-headed machine because of the greater down pressure just cuts faster.
  • As mentioned, three-headed machines deliver a great polished concrete surface
  • Three-headed machines use less tooling. So, this saves the contractor money.

Three-headed machine Cons. 

  • While three-headed machines are smooth-running machines, they are not as smooth as a four-headed machine.

Four-headed planetary grinder PROs.

  • Very smooth running machines. When running some machines all day, they can really wear you out. But four-headed machines run much smoother, lessening operator fatigue.
  • Clean, crisp, clear reflection and shine when polishing concrete, three-headed machines do well, but a four-headed machine excels.
  • Ease of maintenance — at least Bartell Global’s Predator machines are! Drive belts, pulleys, bearings are readily accessible and easy to replace needing only standard tools.
  • Delivers a very consistent cut across the width of the machine, resulting in less overlap needed on your passes, allowing you to grind and polish with less overlap, increasing productivity.  
  • four headed machines also produce a "flatter" floor with less very subtle "birdbaths" this is because with a four headed machine, one of the heads are always delivering more downward pressure to any subtle high spots in the concrete and these high spots are ground level with the rest of the slab.

Four-headed machine Cons. 

  • Cost. Four-headed machines just cost more money to manufacture and that fact is reflected in the sticker price.
  • Four-headed machines are not as fast at grinding as three-headed machines.

When trying to choose between these two great types of machines I’d ask these questions...

"Do you do more concrete profiling to achieve the needed CSP and less polishing?" "Are you starting out in business and the cost of equipment is a concern?"

if your answer to these questions is "yes" then a three-headed machine is probably the choice for you.  

But if you answer these following questions with a "Yes"...

"Do I plan to FOCUS most of my projects on polishing versus surface preparation?"
"Will I focus on high-value / high-quality customers and finish expectations?"
"Will my workload and project types support a higher quality/priced machine?"

Then most likely a four-headed machine is the best fit for you. 

POWER TROWEL POLISHERS

Power Trowels have been around for many years, they are used in the placement of wet concrete. But in recent years manufacturers have learned that the correct polishing diamonds attached to a float pan, makes a great polishing system with unheard-of production rates! While this system is NOT suited for some projects, where it is applicable, it is an awesome choice.

WHERE WOULD YOU USE A POWER TROWEL?

This system is a great choice for very large projects  20K sq. ft. and more. the reason for this is its very high production rates. this system is great for warehouses, production facilities and manufacturing floors.

WHERE IS THIS SYSTEM NOT APPROPRIATE? 

Smaller, high-end, projects where wall and millwork finishes are already installed, as well as occupied spaces. the reason is that you must use a power trowel "WET" the floor must be flooded with water and polished using this "wet method" and this method is just not practical for these types or projects. 

CLICK HERE FOR MORE INFO ON PLANETARY VS POWER TROWEL POLISHING

For more concrete grinding and polishing toolsinformation, please contact us. We will provide professional answers.

MULTI-HEAD NON-PLANETARY MACHINES

These machines vary in size and number of heads. It's common for this type of equipment to have between six and eight cutter heads, though there are machines with more heads and fewer. These machines have no main drum rotating, just the individual heads turn.

They are also operated differently than true planetary grinders. But with a little training, these machines can be a good option.

. Like all the other styles mentioned, this type of grinder can be a good choice... or not... depending on the manufacturer. So, be sure to do your research before purchasing one.  

a few more IMPORTANT POINTS

ANY MACHINE IS ONLY AS GOOD AS ITS TOOLING

Simply put, tooling selection is just as important as machine selection. You can do all your research and buy the best machine for your projects, but if you do not understand tooling, and do not use the correct tooling — in this case mostly diamond tooling — you will be unhappy with the machine's performance. 

So, do your research, educate yourself on how diamond tooling works, call your manufacturer and ask for directions from their tech-reps and trainers. Tooling and equipment manufacturers will typically have these resources available. 

Here at Bartell Global, all our sales reps are very familiar with both the equipment we manufacture as well as the tooling options available for each machine. We also have a dedicated product trainer who responds to these inquiries every day. And we are by no means alone, most reputable manufacturers and distributors are more than willing to help, as we all want contractors to have a positive experience with the equipment we manufacture. 

So, yes, there are a lot of types of concrete grinders to choose from. And, it can be a little intimidating. but with a little research and advice from Pros that have experience with grinders you can succeed! And choose the

EXACT, CORRECT, MACHINE.

CLICK HERE FOR MORE INFORMATION ON CORRECT DIAMOND SELECTION 

tent here…

Ultimate Guide to Concrete Grinding

Damaged or uneven concrete surfaces can reduce your property's value by a lot and create safety risks. Most people think replacement is the only option. However, concrete grinding is a quicker way to fix many surface problems and costs less too.

Your uneven concrete sidewalk, damaged driveway, or uneven pool decks can look new again with concrete grinding and the finishing help of Like-Nu Concrete Restoration. This method saves money and helps your concrete surfaces last longer.

This piece covers everything about concrete grinding. You'll discover if you need it, whether you can do it yourself, and the exact steps to get professional results.

When to Consider Concrete Grinding

Weather, traffic, and time constantly wear down your concrete surfaces. You can save money and make your concrete last longer by knowing when grinding works best.

Common concrete surface problems

Moisture exposure, freeze-thaw cycles, and daily use take their toll on concrete surfaces. You'll spot spalling where the surface chips or flakes off. Scaling creates an ugly and dangerous surface. These issues show up first on driveways and walkways that see heavy traffic.

Signs your concrete driveway or walkways need grinding

Look for these telltale signs that concrete grinding might be your best option:

  • Uneven surfaces or trip hazards up to 1.5 inches in height [1]
  • Surface damage from freeze-thaw cycles
  • Rough patches that make noise when vehicles or equipment move across [2]
  • Spots where water collects because of uneven settling

Cost comparison of grinding vs new concrete

Concrete grinding costs between $2.00 to $6.00 per square foot [3], which makes it nowhere near as expensive as full replacement. Replacing basic concrete average cost can be between $20 to $30 per square foot. But you should think over these points:

  • Original Investment: Grinding costs less upfront but might need repeating if you don't fix the mechanisms behind the damage [4]
  • Long-term Value: The right grinding job extends concrete life, but thinner concrete could be more prone to damage [5]
  • Project Scope: Grinding is an affordable fix for areas with less than 1.5 inches of difference [1]

Note that grinding works best with minor surface issues and saves money. Deeper problems or structural issues might need different solutions.

DIY vs Professional Grinding

The decision between grinding concrete yourself or hiring professionals depends on several important factors. Let's look at what you should know to make the right choice.

Assessing project scope

Before you start your concrete grinding project, take time to review the size and complexity of the job. Professional help works better for foundations, footings, and larger projects. You might handle small areas under 100 square feet yourself, but bigger spaces need professional expertise to get even results.

Required skills and equipment

Professional concrete grinding needs specific knowledge and equipment. Here's what you'll need if you decide to do it yourself:

  • Heavy-duty concrete grinder (available for rent)
  • Diamond grinding wheels of various grits
  • Dust containment system
  • Proper safety equipment

New concrete floors are usually harder to grind than older surfaces [6]. This affects your choice of equipment and technique.

Cost comparison

The financial aspects of DIY versus professional services include:

  • Professional grinding services: $1.00 to $4.00 per square foot for labor [7]
  • DIY equipment rental and materials: You save money upfront but mistakes can get pricey
  • Total professional service cost: $3.00 to $8.00 per square foot for residential projects [7]

DIY might look budget-friendly at first, but professionals bring expertise that helps avoid expensive mistakes. They work faster and often back their work with warranties [8]. On top of that, professional contractors use industrial-grade equipment that delivers better results than rental machines [9].

Note that concrete grinding gets tricky near edges and corners [10], where DIY work often shows uneven results. Working with very hard aggregate means higher costs and more challenges, since these materials need more time and specialized equipment to handle properly [11].

Step-by-Step Grinding Process

The right preparation and technique are vital to grind concrete successfully. You can achieve professional results safely by taking a systematic approach.

Surface preparation steps

A well-prepared surface makes all the difference before you start grinding. Your first step is to check the floor for bumps, holes, and imperfections [12]. The entire surface needs to be clean and free of debris, grease, or existing coatings. Any holes or depressions should be filled with concrete filler before grinding to protect your equipment [13].

Grinding techniques for beginners

These proven techniques will help you grind concrete effectively:

  • Keep a steady pace to achieve an even surface [12]
  • The grinder should stay flat against the surface to prevent gouging [12]
  • Each pass should overlap slightly for consistent results [12]
  • A vacuum attachment helps control dust and maintains visibility [14]

Your grinding pressure should match the concrete's hardness to get the best results. Soft-bond diamonds work best on hard concrete, while hard-bond diamonds are needed for soft concrete [15].

Common mistakes to avoid

These mistakes can ruin your grinding results:

  • The grinder speed should not be too fast as it creates inconsistent cutting [16]
  • Surface inspection is essential - skipping it risks equipment damage [17]
  • Quality suffers when you rush through the grinding process [17]
  • Proper dust control measures prevent health hazards - don't skip them [16]

Safety First: Your safety gear must include eye protection, hearing protection, and a NIOSH-certified N95-rated respirator [18]. Good ventilation and dust control measures protect you from harmful silica dust [14].

Run your hand over the surface regularly to check your progress and ensure you achieve the desired smoothness [12]. Tough spots should be worked gradually - forcing the process could create low spots in your concrete surface.

After Grinding use Like-Nu Concrete Restoration Kit

A perfect finish on your concrete surface needs proper restoration after grinding. The Like-Nu Concrete Restoration Kit gives homeowners a professional-grade solution.

Using Like-Nu Concrete Restoration after grinding

The restoration kit has everything needed to cover up to 400 square feet of concrete surface [19]:

  • 5-gallon mixing bucket
  • Straining net
  • Concrete sponge
  • Part A and B Like-Nu mix components

You can apply the product easily - just mix the components and use a standard garden sprayer. This spray-on method works better than traditional trowel-based products [20].

Like-Nu is the perfect finishing product

Like-Nu stands out because it blends naturally with your existing concrete. The product's proprietary formula spreads through the concrete instead of sitting on top like typical coatings. This allows the surface to breathe and prevents peeling or blistering [19].

The product is a great value at less than $1.00 per square foot [19], making it one of the most affordable options available. Its UV performance matches standard concrete [19], so your restored surface keeps its appearance over time.

Conclusion

Concrete grinding provides a practical and budget-friendly fix for surface problems on concrete surfaces. The process calls for careful evaluation of project scope and equipment requirements. Proper grinding can extend your concrete's lifespan by a lot without excessive costs.

Your success relies on picking the right approach for each unique case. Professional services or DIY methods both work well if you follow proper techniques and safety protocols. Harder concrete surfaces just need specialized equipment and expertise. Professional services become a smart investment for these challenging projects.

A Like-Nu Concrete Restoration Kit delivers that perfect, lasting finish after your grinding project. This professional-grade solution protects your investment and keeps your concrete's natural look and breathability intact.

Your restored concrete will last for years when you pair proper grinding techniques with quality restoration products. Quick responses to surface issues and regular upkeep help preserve your concrete's appearance and structural integrity. This approach saves both money and hassle as time goes on.

For more information, please visit buy trapezoid grinding plate.

References

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