Although it is nothing more than a rotating disk driven by an engine, the truth is that the grinder is a very versatile tool when performing cutting, sanding, grinding and polishing tasks of all types of materials and surfaces. A task in which a professional machine, such as the Bosch Professional GWS 7-125 model is very helpful. This product has 720 watts of power and has a compact design, which makes your job easier. Even smaller is the Einhell TH-MG 135E product. A mini grinder of 135 watts of power that is accompanied by a wide range of accessories.
- 1 The best grinders on the market
- 1.1 Mini grinder Einhell TH-MG 135E
- 1.2 Battery grinder Hitachi G18DSLWJ
- 1.3 Angle grinder DeWalt DWE494TWIN-QS
- 1.4 Straight grinder Makita GD0600
- 1.5 Bench grinder Compa Tech CTAD3215F-W
- 1.6 Parkside grinder Parkside PWSA 20
- 1.7 Small grinder Bosch Professional GWS 7-125 12V-76
- 1.8 Pneumatic grinder Korman 215205
- 2 Grinder Accessories
- 3 Guide to buying grinders
The best grinders on the market
If you want to sand, rough or even cut materials with just one tool, then you will be interested in finding the best grinder of the moment. A versatile tool with which to do these and many other tasks effectively. However, knowing which is the best grinder is not something simple, because there is a lot to choose from. So whether you are looking for cheap grinders or others of a higher level, you just have to see what we have chosen for you.
Bosch Professional GWS 7-125
The Bosch Professional GWS 7-125 grinder is a versatile product designed for intensive use, especially all types of materials. A model that is capable of reaching 11,000 free-turning revolutions thanks to a 720-watt motor, which also includes two positions of use. This engine has been improved with broader cooling, which prevents overheating of the grinder during work, as we could expect from what for many users is the best current grinder.
A job that is also more comfortable, since it has an additional handle that we can place in the position that suits us, thus fixing the orientation of the machine with respect to the material when working. It is accompanied by all the necessary accessories to start working immediately.
Featured as the best brand of grinders by a good part of the market, let us know more about this model and its functions.
Power : It has a 720 watt power motor and improved performance.
Ventilation : The body includes larger ventilation windows, which better cool the engine.
Spin : The disc reaches 11,000 revolutions per minute, in free spin mode.
Double grip: Includes an additional grip, which gives more comfort to your work.
Compact : Despite its characteristics, it is a compact model, making it easier to work in small spaces.
Origin: Some users report receiving a product made in China, although this does not imply a change in its durability or potency.
Buy on Amazon – Price (€ 69.01)
Mini grinder Einhell TH-MG 135E
The mini grinder Einhell TH-MG 135E is an ideal product for those who want to do all kinds of small-scale work and have a wide range of accessories for it. Specifically, this model has a manual and simple to use design, which makes it easier to achieve the expected accuracy for this type of product. Something that also helps your weight, about 700 grams.
The engine of this Einhell grinder has a power of 135 watts, and can reach a turning speed of up to 10,000 revolutions. Something suitable for all its functions, including polishing, screwing, sanding and even cutting. Tasks in which you can rely on its wide range of accessories, which are organized within the product’s own carrying case, so you always have everything at hand.
So that your small jobs are also comfortable, let us know some more information about this model.
Power : It has a power of 135 watts, enough for the work you will do with the product.
Comfort : The handle is comfortable to use and the machine has a light weight of about 700 grams.
Accessories : The kit includes a wide range of accessories to perform all types of work.
Briefcase : A practical briefcase is included to store both the machine and its accessories.
Wear: The durability of wear accessories, such as files or discs, is improved.
Battery grinder Hitachi G18DSLWJ
Among the best grinders of 2020, a battery grinder could not be missing, such as the Hitachi G18DSLWJ. This product has a small body, although it is capable of using 11.5 cm diameter discs without problems, turning at speeds of up to 9,100 rpm. Something that generates a working torque of 1.25 Nm. Something considerable considering that we talk about a battery model.
This battery has a capacity of 5 Ah and a voltage delivery of 18 volts, which gives adequate autonomy and performance to the product when working. For the rest, this Hitachi grinder has the usual operation, including the double adjustable handle, the storage case, as well as the charger and two batteries, to work with one of them while charging the other.
For you to know what grinder to buy, you need to know all the available information, such as the one we expand below on this model.
Turning speed: The 18-volt motor generates a idle speed of up to 9,100 rpm.
Compact design : The compact design makes it easy to work in hard-to-reach areas.
Accessories : The grinder is accompanied by two batteries and charger, so you can work longer.
Comfort: This model includes the additional handle and has an efficient design, so that you work with greater comfort.
Performance : You may notice a slight loss of performance when the battery is about to run out.
Price : This model is not among the cheapest grinders in our collection.
Angle grinder DeWalt DWE494TWIN-QS
If you need to equip yourself with a quality angle grinder, this kit does not include one, but two machines. Specifically, we have a DeWalt grinder of 2200 watts of power and a disk size of 23 centimeters, for larger jobs, along with another grinder of the same brand with 900 watts of power and a 12.5 cm disc. Both elements form an interesting combination with which to perform all kinds of work, regardless of its scope. Some models that have the same quality and durability of all the brand’s products.
The grinders include all necessary accessories for use, such as additional handles or adjustment keys, not forgetting the carrying case. And for greater peace of mind, the brand gives you 3 years warranty, as proof of the good resistance offered by this model
Expand your working range with the two grinders offered by this complete DeWalt kit.
Two in one: With this kit you have two machines, with which to perform all kinds of work.
Comfort : Grinders have a good grip and reduced vibration, for greater comfort.
Durability : Coming from a first level brand, the machines will accompany you for a long time.
Weight: The weight of the machines is somewhat higher than similar ones, although this does not penalize the comfort of use.
Protector: The largest machine protector is not metallic, but plastic.
Straight grinder Makita GD0600
The Makita GD0600 grinder is a somewhat different product than what we have been commenting on. Specifically, this product is a straight grinder that, unlike the angular ones, has a different approach, although just as practical, when performing different jobs. For this, the model has a power of 400 watts and a spindle of 6 millimeters, being therefore suitable for carrying out small and medium-sized work, with greater versatility than larger models.
Due to its characteristics, it is a very manageable product, combining a tight weight with a good grip area. Something that allows to achieve greater efficiency in the finishes. It ends with a good size cable, which gives you the mobility you need when moving and working on the materials.
If you prefer to work with a straight grinder then this product interests you.
Straight design : The straight design is an advantage for cutting or finishing and roughing work.
Power : Its 400 watts of power make it easier to work on all types of hard materials.
Comfort : It has a comfortable handle and a light weight, to work more comfortably.
Scope: It may fall short for larger jobs, although it has a wide range of applications.
Expertise : By its system, it is a grinder that requires some more expertise to use it.
Bench grinder Compa Tech CTAD3215F-W
Among the cheapest grinders on the market we find the Compa Tech CTAD3215F-W model. In this case, we talk about a bench grinder with two separate rotating discs, which are suitable for all types of roughing, polishing and finishing work of pieces of different materials. For this, the product has a stone of final finish and a metal disc of roughing, with which you have everything you need for these auction work.
A job that also helps to have an operating power of 250 watts, which moves the disks with the speed and power necessary to perform the proposed tasks effectively. The model is finished off with the design of a table product, so that it can be operated without holding the machine and with adequate safety.
Complete your workshop with this table grinder, whose most notable functions are highlighted below.
Complete set: The table has a polishing and finishing disc, for a quality result.
Power : Its 250 watts of power are enough to move the disks efficiently.
Safety : Both discs include the necessary protectors to avoid the projection of particles.
Screwed: Does not include holes for fixing to the table, although its weight is sufficient to work comfortably.
Support : The roughing wheel does not include support to place the object to work.
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Parkside grinder Parkside PWSA 20
Although it is not one of the best known brands, we could not miss a Parkside grinder among our chosen ones. We are talking about the Parkside PWSA 20 model, which offers us a new cable-free operating system, using a rechargeable battery.
The grinder has a space designed for 11.5 cm discs, in line with most of the models on the market. It also incorporates the already classic improvements, such as the additional mobile handle system, which we can place in the position that suits us. Something that adds extra comfort to a product that also stands out for its light weight and compact size, accompanied by a pleasant ergonomic grip throughout the traditional holding area. It includes a quick disk change system, to make the process even easier.
Working with comfort is easier thanks to models like this grinder, which we analyze below.
Without cable: This model does not need cable, but works directly with battery.
Grip : It has an additional handle and a very comfortable design in the grip area of the machine.
Quick change: The quick disk change system does not require tools and is very convenient to use.
Battery and charger: Both the battery and the grinder charger are sold separately.
Ignition : The location of the ignition is located at a point where it could be accidentally activated when holding the grinder.
Small grinder Bosch Professional GWS 7-125 12V-76
Not all jobs require a large draft machine, but some of them need a small grinder, such as the Bosch Professional GWS 7-125 12V-76 model. This Bosch mini grinder works with 76 mm diameter discs, but maintains high performance in the face of any challenge that may arise.
The grinder has a rotation speed of 19,500 revolutions, driven by a 12-volt motor in a cordless system. Something that adds even more versatility to the model both when making cuts and working in all kinds of places without having to have plugs nearby. This aspect does not affect your comfort, as the product maintains a light weight, about 900 grams, as well as a handle of good size with which to achieve adequate precision during work.
To be clear about what this model offers you, we leave you the result of our analysis in this regard.
Without cables: This model works without cables, to give you greater comfort during use.
Power : Despite its approach, the disc rotates at speeds of up to 19,500 rpm.
Grip: The model facilitates an adequate grip while working with the product.
Noise: The product generates a noise of 86 decibels, which is quite high for this model.
Charger and battery: As usual, the charger and battery must be purchased separately.
Buy on Amazon – Price (€ 110.34)
Pneumatic grinder Korman 215205
Unlike conventional grinders, the Korman 215205 pneumatic grinder is a product designed to operate with air, using conventional ¼ inch inlets. This model needs an air inlet pressure of 6.3 bar, with which it is possible to achieve adequate performance when working with it. Something that is easy thanks to the trigger trigger, located in the area of the handle and allows you to work directly with one hand. Something that also facilitates having a high quality metal fabrication, which not only gives resistance to the product but also simplifies that grip.
The grinder is accompanied by 10 different heads with its corresponding adapter, as well as a briefcase in which it is easier to store everything when you are not using it. Something that, together with its adjusted cost, brings it closer to being the best quality-price grinder of our chosen ones.
Change the way you work with this efficient pneumatic grinder, which we analyze below.
Pressure: An air pressure of 6.3 bar is enough to start working with the device.
Finish : The metallic finish gives greater resistance to the device during use.
Accessories : It is accompanied by 10 molas and briefcase to store everything when you do not use it.
Trigger: You must be careful not to catch your hand during the activation of the grinder.
Size : The size of the molas is suitable for small jobs, but perhaps not for others of greater draft.
Buy on Amazon – Price (€ 22.9)
Grinder stand Wolfcraft 113232
The Wolfcraft 113232 grinder stand is just what you need to safely perform different cutting tasks. This model has a size suitable for machines that use 115 and 125 mm discs, giving you extra security during those cuts. To do this, the product includes a disc protector, which prevents us from accidentally touching it, while retaining the particles during cutting.
A model that has a stable base and a universal adjustment system, which makes it even easier to mount any compatible machine on its surface. Something that also helps its solid finish with a high strength diecast.
Guide to buying grinders
Among the power tools we have at our disposal, the grinder is one of the most versatile. This serves to make cuts, polish, sand or rough materials, among other options. But for the product to perform as it should, it should be clear what we should look for before buying. Some aspects that we summarize in this guide to buy the best grinder, where we give you all the clues you need to make buying a good and economical grinder much easier.
The first aspect to determine is the type of grinder that we need or that require the tasks that we are going to execute. Something that is easily understood just by taking a look at any comparison of grinders, in which we will find different types and models with which to perform different tasks.
Starting with conventional grinders, it will be necessary to choose their size. In general, we can say that there are large grinders, for discs of 12.5 cm or larger. We also have medium sized ones, with 11.5 discs about 7.5 centimeters in diameter. And finally we would have the mini grinders, ranging from those with 7.5 cm discs to the smallest ones, common in marquetry work or crafts. These distinctions are approximate, given that the variety of products on the market is more than considerable.
Regarding the type of grinder, apart from the conventional ones, we have others such as straight grinders. These are more useful when making cuts because they allow you to see everything clearer. We also have table grinders, which we do not have to carry in our hand, but instead are placed on any support and have rotating wheels with which to polish. They are alternative models to conventional and suitable for certain jobs.
Power and power
Within the parameters that mark both how much it costs and what a grinder is for, its power is also found. This power is given by that offered by the engine, although the speed of rotation it reaches must also be verified. The higher these two parameters, the greater the ability of the product to work efficiently, especially on harder materials.
As a reference, a conventional grinder can start at around 500 watts of power, if it works in plugged mode, while a mini grinder is usually around 100 or 150 watts. As for the speeds of rotation, conventional models are around 10,000 rpm, while smaller ones can increase the level to almost 20,000, since they use smaller discs and, therefore, spin at a higher speed.
This leaves us the issue of food, which we have already raised. Conventional grinders are usually wired, so we need a plug nearby to use them. Battery models, meanwhile, do not require a plug but carry a battery from which they obtain power. Something that gives more comfort to the use, although it is also true that plugged grinders are cheaper than conventional ones. So it’s all a matter of seeing what suits you.
Comfort of use
Although there would be several aspects to comment, perhaps the convenience of use is the most interesting, as in any manual tool worth its salt. Something that we must take care of even in an economic grinder, since if it is an uncomfortable use, surely it is not pleasant to work with it.
For a grinder to be comfortable, you need to have a good grip. This grip affects both the body of the machine and the additional handle, which is almost essential today. Something that must be combined with a light or tight weight, so that we do not have to carry too much during work. And if the product has a compact size, which facilitates its movement and reach where necessary, much better.
On the other hand, comfort also affects disk change. Therefore, the system included in the grinder for such a change must always be comfortable and easy to execute. Models that allow the change without tools are preferable, although if this process is not complex, nothing happens to use a key. By the way, do not forget to also check the safety zone, which prevents the projection of particles. Something that will give you extra comfort during work.
Frequently asked questions
Q1: How to use a grinder?
The use of the grinder is something that depends on what we want to do. If what we want is to perform cutting tasks, we should be done with a suitable support on which to mount the grinder and hold the piece. When sanding surfaces, we will have to run the grinder through the area to be sanded, removing burrs and other unwanted elements from the surface of the object to be sanded. Something similar happens if we want to sharpen any cutting element, whose process is quite similar to sharpening.
Q2: How to sharpen an ax with grinder?
In order to sharpen an ax with a grinder, it will be necessary to previously check the grip of the cutting head on the handle, as well as clean the cutting blade, sanding it if necessary to remove rust and dirt. Next, the ax blade is placed on a suitable support and we proceed to apply the grinder disk on the surface of the blade, trying to give it an angle of 5 to 15 degrees. It is important to keep the original edge and not overheat the blade during the process. Once the sharpening is finished, we let the blade cool for 10 minutes and we will apply some protector to it, if we consider it necessary.
Q3: What is an angle grinder?
The angle grinder is nothing more than a conventional grinder, although with its full name. In fact, almost all grinders are angular, since they can work at different angles depending on the tasks we have to perform. Even straight or edge grinders can also be angular, since the fasteners allow this working angle to be adjusted.
Q4: How to change the coals to a grinder?
Coals, also called brushes, are fundamental elements for a grinder to work. These tend to deteriorate with use, although luckily their change is relatively simple. We will start by opening the product housing, always verifying that the grinder is unplugged. In general, it is usually enough to remove the screw from the lower cover of the grinder, located in the cable area. Once the housing is open, we will have to look for the carbon holders and remove them, lifting the tab that holds them. Here we place the new coals, verifying that they are well placed and connected. Finally, we test the grinder and, if everything is correct, we can close the housing.
Q5: How to cut glass with grinder?
To make this type of cuts, we must use a specific disc for this material, which generally has a diamond edge. To proceed, we must place the glass properly on a support, mark said area and proceed to the cut very carefully, without exceeding the speed or pressure on the edge to be cut. It is important to remember that this cutting process is not suitable for all types of crystals, especially if they are thick, so it should be limited to thin crystals and appropriate to the size of the disc.