Best Concrete Grinders Australia for 2021

Best Concrete Grinders Australia for 2021

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If you’re looking to get your hands on the best concrete grinders this year, there’s a good chance you’ve done a tonne of research online and not come up with too much.

We know there are virtually countless different products and concrete grinder models out there to choose from, all with their own unique features and use cases. That said, we’ve done most of the heavy lifting for you in our research and analysis of reviews — so you don’t have to.

All of the concrete grinders on our list come with fantastic features, great user reviewers and are coming from some of the best brands in the industry. With that in mind, you’ll be in good hands with whichever model you choose.

However — always be sure to choose a model of concrete grinder that suits you, your workflow and your trade best.

Let’s get into the best concrete grinders for 2021!

Some Important Considerations

Before we dive into our list of all the best concrete grinders out there, we have some essentials to keep in mind.

If you’re new to investing in power tools, or just don’t know all too much about grinders or concrete grinders in particular, we have a few tidbits below for you. You’ll always want to make sure you’re getting the best product, and in saying that, concrete grinders do have a few more aspects to consider than traditional grinders.

One of these aspects is the grinding disk, the depth of the disk and also how the disk’s size affects your daily workflows in the shed.

On top of this, you’ll also need to consider whether you’ll be wet or dry grinding and whether you’re after a handheld model, or something more professional for your daily tasks.

Take a look below at things to consider when buying a concrete grinder.

Understanding a Concrete Grinder

Off the top, the first thing to consider is what a concrete grinder is and why you’re going to want one of these models above a typical disk grinder.

As you would expect, a concrete grinder is a grinder that has been designed for use with concrete — rather than steel. These tools will essentially feature a grinding disk that is more suited to grinding materials such as marble, granite and concrete, for example.

These models are also built with two use cases in mind — the hand-held option and the more traditional walk-behind option. This is one of the considerations you’ll need to keep in mind.

All grinders will have some form of powerful and efficient rotating disk that takes care of the grinding process for you. This disk is essentially the main moving part on the grinder, and something you’ll need to make some choices about, depending on what type of work you’ll be doing with your grinder.

Things to Consider about the Grinding Disk

Getting into the more technical considerations, one of the most important things to keep in mind about your grinder is the disk and the size of the disk supported.

A good majority of grinders support the switching out of the grinding disk, though most do come with a silicon carbide or a carborundum material to take care of the grinding. There are also diamond-based grinding disks too, for the more professional and heavy-duty tasks at work.

These diamond disks are essentially a typical grinding disk that has been coated or studded in diamond materials that enable a more precise and far more powerful and heavy-duty grinding experience.

For those of our readers looking for the diamond studded models, you’ll need to look toward the grinding cup-wheels which are the more common tools in which diamond is used. And with that in mind — the heavy-duty tasks should be delegated to these grinding disks.

On most grinders, you’ll find that this tool is typically studded with around eight diamond rows or ‘segments’ that greatly enhance the grinding experience regardless of how strong or durable the concrete or stone is you’re looking to grind. Essentially, making light work of any stone-based or concrete material is possible with the diamond disks.

A second big consideration here is that the disks are incredibly effective at grinding down even the strongest materials, and in some cases this might present an issue in that the process happens a little too quickly.

You may find that you’re boring or cutting holes into your stones accidentally, which, of course, presents a big problem for some contractors. That in mind, these grinding disks might be a little too heavy duty for the lesser important tasks.

Grinding Depth Considerations

Another key point to keep in mind when it comes to your concrete grinder is the supported depth by the grinder’s design and also the cutting disk.

If you’re not already aware, the shape of your grinder’s head and the attached disk is going to dictate how ‘deep’ into a material you’re able to cut or grind. That said, it’s always a good idea to take a look at grinder specifications and pair these with the task at hand.

You don’t want a grinder that inhibits your project’s completion.

For those who are looking for a solution to grinding on the largest slabs and have a rather large work area — for grinding — you’re going to want to invest in one of the larger walk-behind models. These are going to be your best bet at making light work of even the biggest projects.

These walk-behind models are typically designed for getting a lot of work done in a short period of time.

For depth, the walk-behind models may also be able to cut a little deeper depending on their design, though it’s always good to check on each specific product.

When it comes to the more common and smaller hand-held models, these are going to be your best bet for the small projects, though they’re also going to take a little longer to do things.

Some of the hand-held options on our list do cut or grind quite deep, though the process is going to be a little slower. You’ll be spending more time grinding away at slabs and getting the same result as a walk-behind model that takes a quarter of the time.

Disk Size Considerations

Another crucial consideration to keep in mind, and potentially one of the most important for contractors is the disk size coming with your concrete grinder.

These disk sizes are going to dictate just how much you can get done before you need to replace your disks — or when they wear down to being beyond operable. Commonly, you will find that there are a few different disk units that come with appropriate names to make the selection process a little easier.

There are four-disc or four ‘disk’ options here that are your heavy-duty options which make light work of long-term use with concrete. However, there are smaller options here that will wear away just a little fast.

For the polishing or grating of larger concrete slabs, you’re certainly going to want to consider something with a heavy-duty four-disk option.

When it comes to metrics, you can typically find grinding disks coming in sizes from ten through to twelve inches as standard. These are the starter sizes and they aren’t too heavy-duty. For the larger tasks, there are the twenty to twenty-four inch options here which will double the amount of grinding offered.

There are also options that run up to thirty inches in diameter, which will be your best bet for getting the larger tasks handled without too much issue here.

When it comes to the multi-disk models on our list, there is a set up built into the grinder that rotates each disk and takes care of all the complicated rotation mechanisms so you won’t have to worry too much about choosing a disk count.

To explain, when your concrete grinder begins to spin, you’ll essentially find all of the disks rotating simultaneously, leaving you to just get to work and not have to worry about starting or tightening disks, etc.

When it comes to the model of grinder, you’ll also note that there are rotation directions to choose from, or some that are pre-selected for you, which are integrated into your grinder to offset any large swinging movements. This is done to make the grinder a little easier to hold and to give you a more precise result.

Considering Wet or Dry Grinding

Another key consideration we mentioned at the start of the article is the grinding type, and whether you’ll be looking at undertaking either dry or wet grinding.

This is important to consider in that some models and disks are designed in a way that greatly enhances the dry or wet experience, and you’re going to want to invest in something that is well-suited to your most common workflow.

A good majority of concrete grinders and their disks can handle the sliding and faster movements on wet materials, and that means you will generally be in good hands when it comes to grinding on any surface.

Though, you will need to keep in mind that when you’re grinding away on a dry concrete floor that there is going to be a rather intense dust cloud that forms and this will mean there’s going to be a health hazard here.

For these situations, we highly suggest that you look toward grinders that have dust bags or some form of dust collection mechanism in place. As you’ll know, wet grinding doesn’t have this issue in that the dust is simply caught by the water. Though, dry grinding will leave you at a high risk of inhaling dust and stone fragments.

A good majority of the concrete grinders on the market today do come with some form of dust bag designed into the grinder or as a hook attachment that you can set up on your own, which is a big perk and something we considered in the best concrete grinders for 2021.

If you’re not overly keen on the dust catcher, there is something else you can do — and that’s pre-wet the surface. When you do this, you’re mitigating the dust issue, though you’ll also want to make sure that your grinder is designed to handle the wet grinding workflow without causing too much damage to the internal parts.

Considering Hand-held or Not

One of our final considerations is keeping in mind whether you’re interested in going hand-held or not.

This is the segment of your consideration process that will keep a few important factors in mind — your portability, the weight and the compactness of your grinder. If you have a workflow that often takes you from site to site or if portability and ease of use is one of the more important requirements for you, then handheld grinders might be the option for you.

These are also going to be the models that reach into the smaller spaces in a workplace, which means if you’re often grinding all the way into corners, or working with a rather tight slab then hand-held is the way to go.

However, keep in mind that hand-held concrete grinders aren’t going to come with a dual or multi-disk feature. This will mean that you will have to ‘fight’ with your grinder a little more when it comes to the product swinging and sliding a little too often.

The smaller hand-held options also only come with grinding disks of around five or seven inches, which may be a little small for the work you are planning on doing, which means you could be spending a little more time per-task, running up your time spent as a contractor.

That said, be sure that you are as pedantic as possible when considering a hand-held or walk-behind model of concrete grinder as these are going to dictate how efficient you are in your project completions.

Considering a Gas or Electric Model

To end our considerations, the final thing we ask that you keep in mind is the fuel or the power source for your concrete grinder.

In most cases, you’ll find that these tools can either run on electric or gas and this is great news for those who need something that still operates when you’re out at an unpowered site.

One thing to keep in mind here is that with single and three-phase power requirements, your concrete grinder may ask a little much of your power connection at home or work, and this will mean that you’re going to have no option but to go with gas.

That in mind, you’ll find that there is a different experience when it comes to gas and electric, with some tradies commenting that gas provides a more seamless and consistent disk rotation, and other stating that electricity has the better experience.

All that out of the way, take a look at your site requirements and where you will be working the most and go from there.

Our Top Concrete Grinders for 2021

With all of our considerations above out of the way, we’re confident that you’ll know what to look for in your grinder and be better able to see what you need for your worksite.

You can now put the hard work to bed and take a look at all of our top choice models below. We have done just about all of the hard work when it comes to vetting these models and checking features, online reviews and workplace experience, so you’ll be in good hands with whichever model you choose.

Take a look at the best concrete grinders below!

The CSG15 Concrete Grinder by Bosch

From the experts at Bosch, you’re getting the CSG15 concrete grinder.

Taking out the top spot on our list, this grinder offers one of the more powerful and versatile user experiences out there and given that it’s a hand-held model, we’re happy to say that it does more than enough of the heavy lifting at work.

There’s an excellent dust collection shroud coming into play here, which is always a plus.

The design of this concrete grinder features an internal grinding mechanism that’s dynamic and powerful enough to assist with everything from concrete grinding, preparation as well as polishing — a plus for those of our readers who need a tool to do as many tasks as possible with.

We know it’s a pain to set down each tool and switch to a new one for each step in the process, and the CSG15 significantly helps with this.

Coming from the Bosch factory, you can also rely on this model to offer one of the more durable and long-lasting experiences out there.

The Size

When it comes to the size of the grinder, we’re glad to say that it falls firmly in the compact category. It’s a relatively lightweight and easy to hold model, which is a surprise to us considering just how powerful and versatile it is at its job.

You’ll find that with a length of just 19 inches and a width of 14 inches that it’s nimble enough to fit just about anywhere you need it to and still provide an excellent grinding, polishing or preparation experience.

With a weight of just 23 pounds or 10 kilograms, you will also find that this is one of the better models out there when it comes to using it for a long period of time. Of course, holding on to a 10kg tool for an hour or two is no easy feat, but it’s a whole lot easier than struggling with a 15kg to 20kg one.

The Disk

As we mentioned with hand-held models, there is only a single grinding disk on offer here, though it comes come with a five inch diamond cup wheel. The replacement and detachment process is also quite easy too, so keeping things sharp isn’t too much of an issue.

One good thing to note is that the disk, or cup-wheel rather, is designed for use in just about all projects. It’s a multi-use or universal grinding disk which means you can make use of it for just about all your tasks at work, saving you time when it comes to switching to another task.

You won’t need to waste time swapping out disks every time you move to a new project.

On top of this, the disk included has large holes and a design that expels heat exceedingly fast, which means you’re not going to find any odd heat build-up issues here which could either damage your surfaces or the tool itself.

To add, Bosch have designed this grinding disk to act as part of the dust collection and mitigation process and the shape allows the dust extraction to work a little more effectively.

One final thing to keep in mind is that there are two different grinding wheels coming into play here, and the grinder is designed to work seamlessly with both of these. One is the diamond model that features eleven different diamond segments, whereas the other option you have to choose from is the turbo-continuos model.

As you’d already expect, the diamond option is the key to getting those incredibly precise and efficient grinding tasks completed, whereas the continuous model has been designed for the more prolonged grating and polishing of surfaces.

You’ll be able to simply sit and use the continuous model for a long period without worrying about heat or the disk becoming too worn and fracturing mid-way during a project.

To end, you’ll use the diamond disk for the texturing and polishing tasks, whereas the continuous model is going to be your best friend with it comes to grating and abrading either concrete, marble or even granite with ease.

Our Favourite Perks

  • Works Both Wet and Dry
  • Has Built-in Dust Collection
  • Lightweight and Ergonomic
  • High-end Grinding Disks
  • Fast Disk Replacement
  • Comes with 12-month Warranty

The US606467800 Concrete Grinder by Metabo

Our runner-up grinder comes from the team at Metabo and we’re happy to say that it also checks off all our consideration and requirement boxes.

This is a second hand-held option and you’re going to find an excellent built-in dust collection mechanism here too. That in mind, this is another great versatile concrete grinder which you’re able to rely on for more than just simple concrete grinding processes.

With this grinder, you’re getting excellent German-made quality here along with a design that takes into account comfort and ease of use over the long term. If you’re someone who often uses their grinder for a long period of time in the shop or on-site, then this is certainly something you’ll want to consider.

The design here doesn’t cause any issues when holding it for a long period of time, and you’re going to note that being just 22 pounds or 9.9kg that hanging on to this concrete grinder for a long time is no issue at all.

The Size

Digging a little deeper into the design and how compact this model is, you’re going to find that with an overall size of just 23 inches long and 16 inches wide that it’s another ultra-small and portable model — at least when concrete grinders are concerned.

This will mean that you’re getting a model that’s a little bit bigger than the model coming from Bosch, though it isn’t too much of an issue. The grinder will still operate in just about any location you need it to and that’s a plus.

To end, there are major portability focuses in mind, though these are primarily with regards to the shape and ergonomics of the grinder.

If you’re looking for a concrete grinder that’s shaped well enough to grind or polish in even the tightest spaces, then this is the option for you.

The Disk

Coming to the tool or the feature that will make or break the Metabo, the grinding disk is a seven inch cup model that features diamonds here to ensure you’re getting the more effective cutting and grinding experience.

You can also use this disk to polish and perfect your final finish too.

When it comes to replacing this disk, we’re happy to say that Metabo have also kept speed and efficiency in mind and you’re able to swap out the disk with a new one in just a few seconds.

Again, with efficiency in mind, the grinding disk is designed for universal use so you’re able to move from task to task without needing to stop and swap out grinding disks, saving you time and keeping your workflow going.

There is another dust catching and heat mitigating design coming into play here like the Bosch model, and that’s great for just about all of our readers. There’s an 8-hole design here which means both heat and dust are prevented from building up here.

One major perk we would like to point out here is the fact that the disk has anti-vibration technology integrated into it. This means you’re going to be able to, again, rely on the Metabo to make your experience grinding for a long period a lot more comfortable.

It’s good to note that both polishing and texturing tasks can be completed here too along with the removal of grits and coats as well.

Like the Bosch, the Metabo also comes with a continuous disk too which is the option you’ll be using to smoothen or grate either marble, granite or concrete without issue.

To end, there is a spindle lock which is relatively effortless to use for most and that means swapping out the cup-wheel is smooth and painless.

Our Favourite Perks

  • Works for Dry Grinding
  • Has Built-in Dust Collection
  • Lightweight and Ergonomic
  • Universal Grinding Disks
  • Fast Disk Replacement
  • Comes with 12-month Warranty

The DWE46153 Concrete Grinder by DeWalt

Our third top choice for hand-held concrete grinders this year is the excellent and durable DWE46153 coming from DeWalt.

This is a single-disc model, as are all of the models above, and you’re going to find a powerful motor in here, built-in dust collection as well as one of the most portable and lightweight designs on the market today.

For those of our readers who are heavily focused on their portability and the weight of the grinders, we do ask that you place this one toward the top of your list. Given that it is around half the weight of the models above, it’s not only your perfect partner for horizontal or floor slab grinding, but also for the times you’re going to need to stand up and grind away at wall concrete and other materials.

The motor in here and the design of the disk is also ideal in that you’re able to use it for preparation of concrete as well as surface polishing too.

To end, durability and reliability are a given coming for DeWalt and we’re standing by this model as one of the winners this year.

The Size

As we mentioned, this may be your overall winner this year when it comes to compactness and size, and that means for longer use and projects that require you to hold on to and work away for long periods, you’ll be kept as comfortable as possible.

The size of this grinder is just 18 inches by 6 inches.

To add, the weight here is an astounding 8.5 pounds or 3.8 kilograms which makes it one of the lightest on the market. You’ll find that this means you’re more able to fit this concrete grinder anywhere you’d need too and even reach high or low on walls without dealing with muscle fatigue.

As we’re sure you’ll agree, tight spaces and hard-to-reach areas are no match for the DeWalt and that makes it a winner for us — at least in the size department.

The Disk

To best fit with the rather small size, the DeWalt is coming with a rather small five inch disk, which can make processes take just a little longer, however, DeWalt have integrated a diamond grinding cup here.

That in mind, you may be a getting a rather small grinding surface, though you will find that you’re able to remain efficient with it.

As for the detachment and replacement of this grinding disk or wheel, you’re able to do this in just a few seconds and without issue.

In all, this is the concrete grinder for those who need something incredibly small though also efficient and powerful. DeWalt have carefully curated the best of both worlds here in their DWE46153 concrete grinder and that makes it a model we ask you to consider this year.

The grinder is powered by an 11 amp inlet and you’ll find more than 11,000RPM on offer here too.

Our Favourite Perks

  • Suitable for Dry Grinding
  • Easy to Look After
  • Has Built-in Dust Collection
  • Lightweight and Ergonomic
  • Universal Grinding Disks
  • Fast Disk Replacement
  • Comes with 36-month Warranty

The 1773AK Concrete Grinder by Bosch

To our final hand-held option, the 1773AK coming from Bosch is another excellent option for those interested in one of the more portable and durable concrete grinders out there.

You’re going to find that this is, again, a versatile and portable model that can use for everything from polishing, preparation as well as grinding. That in mind, you’re getting a tool that assists in workflow efficiency and not requiring you to stop all too often during a project to choose another tool.

Both internal and external components in this concrete grinder are very similar to the model we mentioned above, however, this model is a little more powerful when compared to the CSG15 we outlined earlier.

Those points in mind, this is your option if you’re after something a tad more powerful though that still remains in a rather compact size.

The Size

With most contractors and tradies focused on the size and portability of their tools, we’re glad to say that the 1773AK has you in good hands. It’s small coming in at just 19 inches long and 14 inches wide and you’re going to have no trouble fitting the ergonomic shape into the smallest and most compact spaces.

It does weigh a little more than the DeWalt at 14.9 pounds or 6.7 kilograms, though, as we’re sure you’ll agree, this still remains incredibly light and portable.

We’d also stand by this model for those who need a concrete grinder that’s going to be finding its way to and from trucks and Utes in that it’s one of the lighter and easy to transport options out there.

If you’re someone who always finds that you’re on the move and needs a powerful and lightweight concrete grinder by your side, then the compact size and small design here is your best bet.

The Disk

When it comes to the disk, there is a standard five inch cup wheel coming into play here, which is, again, a little small. However, coming on such a compact and small grinder means that there isn’t too much else that will fit here.

That in mind, the powerful motor and the disk’s durability mean that this concrete grinder is versatile enough to assist in everything from grinding and polishing.

To add, the disk itself and the grinder have both been developed in a way that reduces vibrations which makes the grinder easy to hold and make use of for long periods of time, and that in mind, you’re getting your work done faster without routine stops.

On top of this, we’re happy to point out that the cup-shaped disk design allows for the expelling of heat quite quickly. That noted, you’re not going to have any issues when it comes to heat issues damaging your grinder or the disk itself.

Our Favourite Perks

  • Suitable for Dry Grinding
  • Easy to Look After
  • Affordably Priced
  • Above Average Dust Collection
  • Lightweight and Ergonomic
  • Comes with 12-month Warranty

The 166859 MK-SDG-7 Concrete Grinder by MK-Diamond

To end our list we have the only walk-behind grinder that’s landing on our list.

This model coming from the MK-Diamond brand is our top choice in that it’s incredibly powerful but it also remains quite light and portable for what it is. As you will already know, most walk-behind grinders are exceedingly large, bulky and heavy and that makes them rather tedious to get to and from work.

Though not the model from MK-Diamond.

You’re going to be able to get your hands on a relatively light and easy to move option here and with two large rear wheels, pushing this tool to grind and polish your concrete floors is effortless.

The Size

As we mentioned, this is one of the more compact walk-behind models out there and that’s coming down to the 44 pound or 19 kilogram weight.

You may have remembered that our top choice hand-held model weighed 10 kilograms, which makes this model a great alternative for those looking for a heavy-duty and portable concrete grinder.

As for the design, you’ll be finding an excellent handle-bar pairing here which includes an ergonomic design you’ll find easy to hold along with the ability for them to be removed when you’re not looking to make use of them.

The length of the tool is 34 inches and the width is just 32 inches, which we’re confident in saying will fit just about anywhere in a vehicle or on a slab that you need it to without any issues.

Usability

When it comes to making use of this model, there are two different speeds to choose from and that means you’re able to either use the grinder for grinding, or for storage.

It’s important to note that the transport speed is a little faster than the actual usable speed in that the grinder lets you move it to where you need it to be a lot quicker than when you’re actually using it.

One thing to note is that you shouldn’t select the transport speed as your speed when you’re grinding floors as this presents a risk for injury if the model slips over.

The Disk

When we take a look at the disk included, you’re finding a seven inch disk here that comes with diamond segments to ensure a smooth and effective grind, polish or texturing of your concrete floors.

The size of the disk may be a little lacklustre when compared to some other larger models, however you’re in good hands here in that the grinder moves around the slab quite quickly and gets a lot done in a short period of time.

Our Favourite Perks

  • Suitable for both Wet and Dry Grinding
  • Incredible Dust Collection
  • Priced Affordably
  • Lightweight and Ergonomic for a Walk-behind

Conclusion

If you’re someone in the trade, you’re certainly going to want to be sure you’re getting your hands on the best concrete grinders to assist in your workflow.

Chances are you’re looking for something reliable and lightweight, but also something that allows you to get your projects completed as fast and at the highest quality possible. We’re sure that all of the concrete grinders on our list will do exactly that, and that you’re in good hands with whichever option you choose.

However, always be sure to select something that you would feel most comfortable using and a tool that suits your workflow the best. If you are after something for wall polishing, for example, the lightest weight models do make the most sense. Though, for larger floor-only workflows, a walk-behind might be the best option for you.

In all, we’re sure that one of the models on our list finds you the best concrete grinder in Australia for 2021.

Sarah Azzi

Sarah Azzi

Sarah Azzi is a mum from Sydney who loves testing the latest goods around the house. She is avid fan of Netflix. Sarah aims to provide the best information for visitors on Current.com.au to find a good deal.
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