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Grinding concrete into a great finish can take a lot of effort with the wrong tools.
That’s why using the best concrete grinder will make your life a lot easier.
With a lot of great products on the market, it can be hard to choose the right one for you.
There are a few key considerations with the likes of speed, dust collection and the depth of the grind all being important.
To get the best concrete grinder for you we will analyze those key features. First up we’ll show you the best grinders out there today.
Here's 3 products we picked out that thought you would be interested in depending on your budget...
The Best Concrete Grinder with reviews 2020
Here's a list of the best concrete grinders we found:
1. Metabo RSEV 19‑125 RT Concrete Grinder - Top Pick
- High speed
- Very powerful grinder
- Gets close to edges
- Adapts to any surface
- No accessories included
- High weight
Metabo produces tools with an incredible level of quality. This grinder is going to last for many years of hard use as it makes light work of that concrete. The variable speed control that it has will allow you to get any job done safely and efficiently.
It has a terrific amount of power and is able to deliver that power with a great level of torque. The dust collection is great and you can also get right up to the edges. This is a stunning grinder that you would be delighted with. It ticks all of the boxes and is able to produce a great depth of grind.
2. Bosch CSG15 5-Inch Concrete Surfacing Grinder - Best Value
- High torque level
- Great safety systems
- Handles a high dust level
- High cost
- Power button placement
For those looking for a lighter option, this is a brilliant grinder. It is still able to get through a high amount of work with its 12.5 amps of power. The guard system that it has will keep you protected and safe. The four-stage dust intrusion seal will help to keep your lungs healthy.
It comes with a fairly high price tag but the reality is that it’s great value for money. It can handle sustained loads and has a professional level of quality. There are very few downsides to this grinder as it’s also comfortable and easy to hold.
3. DEWALT DWE46153 Surface Grinding - Best Cheap Pick
- Fantastic speed
- Easy to use
- Great dust collection
- High power
- Smoking issue
- Dust shroud can clog
Even though this is a budget option, it’s still a tool that has an exceptional level of quality. The grinder can spin up to 11,000 RPM and delivers that with more than enough torque. The quick-change wheel release helps to prevent any delays in work.
The grinder also has a brilliant level of dust collection to leave you with a very clean surface. One issue that users have found is the motor quickly failing. This is covered by warranty and also appears to be a faulty batch, as most users are more than happy with it.
4. Bosch 1773AK 5" Hand Concrete Surfacing Grinder
- Great dust collection
- Comfortable to hold
- Protects against dust contamination
- High speed
- Slows quickly under pressure
- High cost
Bosch have also made this concrete surfacing grinder. It works well for smoothing floor pavement and cleaning concrete surfaces. It does a very effective job with the 10 amp motor and the 11,000 RPM that it’s able to deliver.
It comes at a high price but it does have a good degree of quality. It has the standard 5” wheel with a large handle. That handle makes it very easy to control and apply pressure into the surface. This is an all-around grinder that is able to complete almost all jobs.
5. Metabo US606467800 Hand Held Concrete Grinder
- Prevents unintentional start-up
- Tools not required for guard
- Reduced vibrations
- Swiveling handle
- No case included
- Shroud hinge can be awkward
The first Metabo grinder we looked at was highly-rated and so is this model. It has many great features including a safety switch for an unintentional start-up. It also has a dampening system to reduce vibration, making it a lot easier on your hands and joints.
The side handle can be mounted in three positions and the main handle can swivel. That ensures a comfortable grip and easy handling. All those features come with a 15 amp motor that is going to deliver a huge amount of power.
What to look for in a concrete grinder
The RPM on these grinders is exceptionally high. It needs to be to deliver a high level of performance required. There are also other key figures that are important, as you also want to ensure that the grinder has enough torque for the job.
An RPM over 8,000 is going to be more than enough with the quickest grinders being able to go up 11,000. It’s not a statistic to get too hung up about as you need to take it into context. The overall quality and power also play huge roles in its ability.
The amperage of the motor is the best indicator of the power that a tool has. The higher the amp figure, the more likely it is to cut through that concrete.
< 10 amps: Any grinder under 10 amps of power is most likely not going to be ideal for concrete. None of the tools we have shown here are below 10 amps,
10 – 12.5 amps: This is going to be ideal for most jobs as it’s able to deliver a professional level of power. You might need a more powerful tool is you are consistently grinding rougher surfaces.
Over 12.5 amps: This will be able to grind a lot of concrete with only a small amount of force. For professional requiring constant use, using a high powered grinder would make the job easier.
You want to make sure that the wheels that you are using are suitable for the job you need. It’s important to check the instructions as any mistakes could lead to inefficient work. Getting the right size is also going to be crucial.
Most grinders will support wheels that are 5” in size. Different wheels will work for different surfaces. If you’re grinding more than concrete then you will want a set of different grinding wheels. Having a grinder that can quickly change a wheel is also a great additional feature.
Depth of the grind
The requirements for the depth of grind will depend on the surface you’re working on. If you’re only ever going to be working on smoother surfaces then it’s not something to worry about. For harder jobs, it’s more important.
Here you will need a powerful motor and a wheel that is up to the task. Larger stand-up models will be best for a large area. For smaller areas, however, a high-quality handheld grinder is going to be able to give you the right depth of grind.
Grinding can be a very messy job. There will be a lot of fine dust flying around which can be extremely hazardous. When grinding, you should be wearing a mask regardless but you don’t want to clean up huge mounds of dust.
All the products that we have looked at come with a vacuum tube. You will want to check the size of the connection it has. For smaller jobs, a shop vac would be fine. For larger jobs, an industrial vacuum would be needed.
There is also the matter of how much dust the grinder is able to direct towards the vacuum. You don’t want to have a grinder that spits dust across the room. The head of the grinder needs to be well designed to keep the dust confined so it can be sucked up.
Wrapping it up
Grinding with the wrong tool can be an arduous task. Spending hours pressing a weak tool into the concrete is a recipe for misery. All of the concrete grinders that we have looked at here are going to be able to get the job done in no time.
The best grinder out there, however, is the Metabo Concrete Grinder. It combines its exceptional build quality with a range of great features. Its high power will eat through the concrete to leave you with a clean surface in no time at all.