They are an ideal option for cutting through wood, metal, plastic and other hard materials. Thanks to the presence of rotating spindle and collect holding bits that rotate at high-speed. Here is a quick outlook of key factors to consider before investing in a die grinder. Power Source – Electric and pneumatic are two types of power sources available for operating die grinders. You have to choose the correct one that suits your requirement.
Electric die grinders are classified into corded (powered by direct electric wall-outlet) and cordless (battery-powered). Cordless is the most preferred option that is portable, quiet, and easy to manage. Pneumatic models are powered by an air compressor that offers more torque and higher motor speed. They are lightweight and inexpensive but they are noisy and have limited reach.
Motor Power – The motor power will ensure that you won’t experience any performance issues while using this grinder. The higher the motor power rating, the powerful the grinder is and thereby delivers better performance. Here the electric models are rated in amps (corded – 3 to 5 amps), voltage (cordless – 18 to 20 volt). While motor power of pneumatic versions is rated in horsepower (0.25HP to 0.5HP). Collet Size – The collect size of a specific die grinder will let you know about its supported bit size. It determines the chuck size that includes options like 1/4-inch or 5/8-inch. Most models come with a standard collet size of 1/4-inch. So, you can find a wide range of bit options to use the grinder for several applications and usage, as per your needs. Apart from these key features, there are so many things to consider, which we have clearly mentioned in our detailed “Buying Guide”. Also, we enlisted some top-selling Best Die Grinder after doing thorough research on several products in the market to help you in making the correct buying decision. Read on to choose the best option as per your work requirement.
Best Die Grinders Table
7 Best Die Grinders Reviews
1. Dewalt Die Grinder
Dewalt is a mainstream brand of power tools out there that makes various electric models, including its die grinder model mentioned here. The Dewalt DCG426B die grinder is present in the 1st position in this article as it offers a high value for money when compared with other electric die grinders out there. This is due to the reason that you get a lot of things for your given money. As per its name, it uses a 20-volt battery system that is quite powerful for most users out there. Its battery system powers a collet size of ¼ inch that is quite universal and allows you to fit a number of bits without any issues. Another great thing about this die grinder is that it comes with excellent built quality. You also get a 3-year long warranty with it that is not found in most other die grinder models out there. Best Features:
Power rating of 20 volts Collet size of ¼ inch 3-year long warranty Inbuilt LED lights Offers a variable speed trigger
Pros:
Great value for money for an electric die grinder Offers high performance with a 20-volt battery system Comes with various controls and adjustments
Cons:
A bit large and heavy
2. Ingersoll Rand Die Grinder
Ingersoll Rand is quite popular among power tool users, as seen by its high user rating, as seen in its die grinder offering. This Ingersoll Rand 3101G die grinder is present in the 2nd position in this article as it is the cheapest option present in this article. And even though it has a budget price tag, you get various things with it that results in a high value for money while using this die grinder. As you can expect by its name, it is a pneumatic die grinder that results in the lower price tag. You get a ⅓ HP motor with this die grinder that is powered using an external air compressor. It is able to offer decent performance to the user for all kinds of required applications. As for its warranty, you get a 1-year warranty that is great for the given price. Although its build quality is a bit on the average side. Best Features:
Power rating of ⅓ HP Collet size of ¼ inch 1-year long warranty Rear exhaust for ease of use Ergonomic grip design
Pros:
Highly affordable die grinder for a high value for money Great performing ⅓ HP pneumatic motor Offers a 1-year long warranty for peace of mind
Cons:
Build quality is on the average side
3. Makita Die Grinder
Makita is one of the more premium and expensive brands of power tools that is known for making electric power tools. The Makita GD0601 die grinder is another option if you are looking for an electric model. Although, this one is not battery powered and requires a power socket to work. Thankfully, it can work on both AC as well as DC electric current using its inbuilt AC/DC switch for ease of use. This motor is able to go up to 2500 RPM that should be more than enough for most users out there. Moving on, Makita offers an excellent build quality with its die grinder that is always great to have. You even get a 1-year long warranty with it that is always great to have. Since Makita uses a ¼ inch collet in this die grinder, you can easily use all kinds of bits with it without any issues. Best Features:
Power rating of 25000 RPM Collet size of ¼ inch 1-year long warranty Offers an AC/DC current switch for ease of use Small and compact design
Pros:
High performance 25000 RPM motor Great built quality with aluminum housing Works with both AC as well as DC electric currents
Cons:
Tethers the user with a power cord
4. Astro Pneumatic Tool Die Grinder
As you can tell by its name, Astro Pneumatic Tool makes pneumatic power tools just like its die grinder model mentioned down below. Astro Pneumatic Tool’s 219 die grinder is a complete kit that comes with a total of three pieces. It includes a total of two die grinders where one is a straight one, and the other one is a right angle one. Thankfully, both of these tools have very similar performance, and you can use either of them without any issues. You also get an 8 piece rotary burr set along with this die grinder kit. Both of these die grinders are pneumatic ones, which means that you need an air compressor to use them. Just like most other options out there, both of these die grinders come with a 1-year long warranty. That being said, the build quality could have been much better. Best Features:
Power rating of ⅓ HP Collet size of ¼ inch 1-year long warranty Kit of 3 pieces Comes with 8 rotary burr set
Pros:
Complete set with two tools and a burr set Decent performing pneumatic tools Offers both straight and right-angle tools
Cons:
Build quality could have been better
5. Aircat Die Grinder
Aircat is a comparatively new brand of pneumatic power tools out there that also makes a die grinder for various kinds of applications. This Aircat 6255 die grinder is one of the most powerful pneumatic tools present in this article. It is able to offer high levels of performance as it is a pneumatic die grinder that can be used with a high-pressure air compressor. Once connected, its motor can go up to ½ HP that is quite good for most users out there. You get a motor speed rating of 20000 RPM from this motor that is quite great for the given price. As for its warranty, it features a 1-year long warranty that is quite similar to most other options out there. Unfortunately, the build quality is not the best, and you can find much better options at this price range. Best Features:
Power rating of ½ HP Motor speed of up to 20000 RPM Collet size of ¼ inch 1-year long warranty Weighs 1.1 pounds
Pros:
High-performance pneumatic die grinder Offers a small and compact design Right angle die grinder for ease of use
Cons:
Poor build quality
6. Chicago Pneumatic Die Grinder
Chicago Pneumatic is another brand of power tools that makes pneumatic models that are generally quite affordable. The Chicago Pneumatic CP875-22 is another die grinder that is on the affordable side and makes for a great option for users who are on a budget. It uses a ¼ inch collet that is the same as every other die grinder present in this article. You also get a high motor speed of 21000 RPM with this die grinder that should be more than enough for most users. As you would expect, it comes with a 1-year long warranty along with a decent build quality. Although it is a bit heavy and on the larger side, that can be an issue for users looking for an ergonomic power tool. Best Features:
Power rating of 21000 RPM Collet size of ¼ inch 1-year long warranty Affordable price tag for users on budget Right angle die grinder for ease of use
Pros:
Decent performance pneumatic die grinder High value for money with budget price tag Right angle pistol grip for tight spaces
Cons:
A bit large and heavy
7. Milwaukee Die Grinder
Milwaukee is one of the most trustworthy power tool brands out there that make highly durable and reliable products. Milwaukee’s 2784-20 die grinder is present in this article as it is the most durable and reliable option mentioned in this article. It offers an excellent build quality to the user that is much better than others. Since you also get a 5-year long warranty with it, you can expect it to last for a long time without any issues. As for its performance, it is powered by an 18-volt battery system that offers decent performance. Because this die grinder uses a brushless motor, it is highly silent and a perfect option for powering its ¼ inch collet. Best Features:
Power rating of 18 volts Collet size of ¼ inch 5-year long warranty Brushless motor Excellent build quality
Pros:
Most reliable and durable die grinder mentioned here Offers decent performance with the 18-volt battery system High grip and ergonomic handle design
Cons:
Slightly on the expensive side
Buying Guide for the Best Die Grinder:
Though a die grinder work similarly, there are some difference in their types, collet size, weight, speed, and price. You have to purchase and use the correct die grinder that suits your requirements. So, we are providing this guide with all the essential information required to get a clear idea of the die grinder, and how to choose your best option. Now, let’s get into the details of what factors to consider while shopping for the die grinder.
1. Power Source (Electric Vs. Pneumatic):
Electric and pneumatic are two types of power sources available to run these die grinders. Each type has its set of pros and cons, in which you have to decide which type you need to use. Here is a clear explanation of both types that help you to choose the best option.
Electric Power –
The electric die grinders are classified into two types – corded (powered by standard wall electric outlet) and cordless (battery-powered). The cordless grinder models are quieter, and portable which let you use them in any hard-to-reach areas or different worksites where we won’t attach a cable. The drawback of this battery-operated model is to recharge them continuously due to its limited runtime. So, we suggest you get an extra battery as a spare to keep it running uninterruptedly. Also, they are quite expensive compared to corded electric and pneumatic models. With their continuous power supply, the corded models are more powerful and effective as pneumatic models. yet restricted with the cord length, and unable to work without any electric outlet power supply. The cordless grinder is like a go-anywhere tool, while corded models restrict your usage with its cable’s length. So, it’s up to you to decide whether use cordless or corded variety. Benefits
Easy to manage and use. Quiet operation Portable and powerful
Drawbacks
Expensive Need continuous charging (for cordless) or power supply (for corded). Require to buy an extra battery (for cordless) or buy extension cord (for corded)
Pneumatic Power Source –
Since they run with the attached air compressor, this pneumatic grinder has strong power that offers higher RPM and torque compared to an electric grinder. They are lightweight (some weigh less than a pound), and cheaper than electric varieties. Usually, it is recommended to have a compressor with a 5 CFM rating at 90 PSI. This allows the compressor to move 5 cubic feet of air via a hose in a minute with a pressure of 90 pounds per square inch. If you choose anything lower than this range, then it won’t be strong enough to do your needs. Alike other air-powered tools, the pneumatic grinders are noisy and need to invest in an air compressor. Another downside is that you can only reach till the hose allows, which means the hose might restrict you from getting the proper angle, particularly while nearing the edge of cord length. Benefits
Higher RPM (speed) Lightweight Inexpensive More torque
Drawbacks
Limited reach Noisy
2. Power Rating:
Irrespective of the type of die grinders (electric or pneumatic), the motor power will matter a lot. So, it is essential to check the power rating of a model before making its purchase. Usually, the motor power of electric models is rated in either amps or voltage, in which the corded versions have motor power rated at 3 – 5 amps, whereas battery-powered models are rated at 18 – 20 volt. The motor power of pneumatic grinders is rated in horsepower, which ranges from 0.25 HP – 0.5 HP. Irrespective of the power rating you choose, the following same rule will be applied – the higher the power rating (amps, volts, or HP), the more powerful the die grinder is. Thus, it quickly and efficiently finishes your task.
3. Collet Size:
The common collet size for these die grinders is 0.25 inches, which confirms the widest choice of attachments for the grinder. If you prefer anything a bit larger will reduce the accessibility of accessories, and thereby make the tool less versatile. Mostly, the burr extensions are available in a set of eight, which consists of sanders and metal grinders of varying sizes & grades. If you find them not included in your grinder kit, then you can easily purchase them separately, as they are relatively inexpensive.
4. Collet Angle:
There are two major angles available for die grinders – 90° angle and 0° angle. Here, grinders with 90° angle are handy tools used to target hard-to-reach areas/spots or difficult corners, mostly on metals. Usually, metal fabricators and welders (professionals) are more willing to work with 90° angle grinders and act as an ideal option to polish when used with circular extensions. Alternatively, 0-degree grinders come with linear positioned collets, which let you attach small saws to them and easily cut through tough surfaces or metals. A 0° pneumatic grinder is easy to control, which makes them an ideal option for both beginners and intermediate users. So, we suggest you go with a 0° angle grinder if you are a beginner, as they are easier to maneuver and use. However, it depends on one’s preference to choose the type of die grinder they prefer to use. To clear this issue, some manufacturers offer the die grinder in both configurations (0° & 90°) angles at a bit higher price. If you can afford this model, then get one to use both collet angles, as per your requirement.
5. RPM:
The speed (RPM) produced by a die grinder is another crucial factor to consider before buying them. A general rule is the higher the RPM, the quicker it lets you accomplish the task and can tackle different materials. A few models let you switch between various speed settings, whereas other models let you change the speed with a throttle lever mechanism. We suggest you purchase a die grinder featuring variable speed, as it enhances its versatility. You can prefer this type of die grinder when having a bit of difficulty in keeping a constant grip for steady speed.
6. Size:
You need to purchase lightweight and compact handheld die grinders, which ease your handling. Naturally, these grinders are designed to be compact and small to make them improve or raise the overall usability. For instance, choose a smaller option when you are an auto mechanic, why because the larger models won’t properly fit inside the engine inlet, between the car’s floor and exhaust pipe, or behind the suspension components. Alternatively, size won’t be a concern for a welder who mostly grinds components that lay flat on the workbench. Going with a compact, cordless grinder will be tricky for small areas or tricky angles. Even though they offer less power, they offer you to get more control over the project.
7. Weight:
Weight will have a major impact on the usability of any handheld tool. For instance, a heavier die grinder user needs frequent breaks, which further extends the work session. Also, this heavier machine is difficult to position and angle. So, we suggest you always choose the machine that weighs under 5 pounds.
8. Exhaust Vents:
Pneumatic die grinders operate by using air, in which a lot of air will exit the tool while using them. Several models feature air vents to direct air to either the back or front of the tool, while some permit for manual direction. Venting is another choice, yet models pointing the air towards the front will remove debris produced by the machine when operating it. Whereas, tools venting air towards the back will blow into the face, which further distracts you and make it hard to observe and work with them. So, check the exhaust position for the safe and effective working of a machine.
9. Temperature Dissipation:
Models without having sufficient horsepower will quickly get hot. In case, if your model is experiencing the same issue, then you have to stop it, and leave the unit for some time to cool. It might extend your work session. Even though there is a bit difference in the unit’s cooling time (some models cool more quickly than others), yet choosing the model with a higher motor power (HP) is the best way to get rid of this problem.
10. Vibration Reduction:
It is a fact that being accurate is a bit hard even for a precision tool like a die grinder when it is vibrating out of the control. It is the nature of pneumatic models to have some vibration. A model with an ergonomic design having rubber-coated handles will reduce a lot of vibrations transmitted to the body. Thus, it allows you better control over the tool. Few models reduce vibrations with the help of internal mechanisms, which is another best option that helps a lot in achieving precision.
11. Ergonomic Design:
It is essential to check the ergonomic design of a model to know about its comfort and ease of use before buying a die grinder. A model with a ridged and comfortable handle will absorb maximum vibration produced by the unit while working and thereby enhance the overall precision. Check the handle position of the grinder to know how it fits your hand and allows you to perform comfortably for a longer time.
12. Housing Material:
Aluminum is the common housing material used for casing most die grinder models to enhance its durability. Don’t assume that every model has an aluminum casing unless you check and confirm them. Generally, the harder casing will increase the durability of a model. You need to purchase a handy grinder tool that is strong and durable to serve continuously for a long time.
13. Motor Protection:
The motor is a crucial part of any tool, which means there is no functioning of the tool without this motor. Several aspects shorten the motor’s lifespan. So, most manufacturers designed with protections built to protect the internal components from any of these hazards. For instance, heat and dust from grinding will destroy the fan blades over time inside the grinder. Also, extreme heat is produced inside the tool when it is used for a longer time. Different safeguards are offered by the tool manufacturers that include automatic shutoff circuitry used to stop the grinder before heat damages the motor. Some new designs offer variable degrees of protection to the motor from the dust and debris produced when using the grinder.
14. Safety Lock:
Attach a special latch to the trigger mechanism of several die grinders as a child safety lock to avoid the machine from accidental starting up. Even though the lock is initially a bit painful to operate, yet they are required in cases if the tool is often left unattended or have kids near the workshop.
15. Safety Features:
As we already know that debris and heat are generated from the usage of a die grinder. If these issues are left unchecked, then it causes some serious problems for the user. These grinders have a wheel guard in their design as a safety feature. If its adjustment is difficult or awkward, then some people will determine either completely remove it or leave it alone. So, while looking for the safety features before buying a die grinder, then you have to check the wheel guards to adjust without using any extra tools.
16. Price:
The price of die grinders will vary a lot based on the features, collet size, power source, motor power, or warranty. The general price range will be from $25 – $500. We suggest you choose the best tool that balances your budget range and requirements.
17. Warranty:
Look at the warranty offered by the die grinder to ensure that it lasts for a longer time without any issues before making its purchase. In general, the die grinders come with a 1-year long warranty, but a few options offer a 3-year or even 5-year long warranty. Other than the warranty, the build quality of the grinder and customer relationship from the manufacturer will play a key role in selecting durable and reliable options. Well-built grinders with a long warranty duration are reliable and last longer.
Required Safety Equipment While Using Die Grinder:
It is essential to wear safety gear as personal protective equipment (PPE) to protect the operator from any injury. Here are some safety tips/equipment listed to use for a safe and effective operating of a die grinder. Safety Glasses – Air particles get released while operating the grinder, which may lodge into the eyes. So, wearing safety goggles or glasses with side protection is the perfect way to prevent the risk of eye damage. Dust Mask – Usually, grinding produce tiny particles that might enter into your respiratory system and lungs, which further increase the risk of health problems, if not taken any proper precautions. So, we recommend you use a dust mask when operating the die grinder and take it out several minutes after stopping the grinder that lets time to settle the particles and dust. Work Gloves – Since these models will tend to be hot even when used for a few minutes, it is essential to wear a pair of heavy-duty work gloves while operating. These heat-resistant gloves will offer more comfort when the tool is used for a longer time. Also, these gloves will protect the hands from any accidental slip with the grinder. Hearing Protection – There is a chance that flying particles might damage the ear while using the die grinder. So, it is essential to wear hearing protection like earplugs or earmuffs all the time to protect your ears from the extremely loud noise of pneumatic tools.
What for a Die Grinder Used?
A die grinder is a versatile tool that can be used to perform several tasks. Here is a list of some tasks that let you know for what we use this grinder?
1. Polishing Metal –
When metals like the stainless-steel look great when they are polished. A die grinder with its polishing attachments (in the form of discs) makes it the best tool to easily tackle unusual contours and shapes. Yet they are not ideal to polish flat surfaces.
2. Reworking Dies –
Die grinders are designed to grind dies that are used in tooling, such as plastic molds, metal casting dies, forging dies, and die-casting dies. The die makers are used to manually shape and match profiles before these precision milling machines are designed.
3. Smoothing Surfaces –
The smoothest finish is a must after completing your project to have a professional look. It will be a bit trickier, why because overworking may ruin the final result. But not with this die grinder, as it makes the process easier. You can smooth different materials like metal, stainless steel, plastic, wood, or alloys by using a proper attachment. Also, these are ideal to clean up weld spots that leave you with a perfect-looking object and smoother result. You may think that an angle grinder is perfect for doing this job, yet a die grinder provides more precise and detailed results.
4. Sharpening Blades –
With the usage of the right attachment, the die grinder can be easily converted into a sharpening tool. Thus, it is used to sharpen hatchets, knives, and axes along with other types of blades. Also, it is the best alternative for a benchtop grinder, which means you can use this instead of the benchtop model.
5. Rust Removal –
New weld spots are more willing to rapid rusting when working with a welding theme. So, clearing this corrosion is vital to the weld’s integrity. Hence, this die grinder will perform this work admirably that remove old rust or stubborn rust spots on the material/surface.
Conclusion:
While there are various ways of grinding a given object or surface, a die grinder is usually an easy to use option. Apart from being highly compact and small, you also get decent performance from these die grinders along with various features. You can learn more about these features by going through the best grinders mentioned in this article. We have even mentioned all of their details, along with a detailed buying guide. This buying guide has various factors and aspects related to die grinders. And if even that is not enough for you, here are some of our recommendations that you should consider before buying a die grinder:
The Dewalt die grinder is the best value for money option present in this article. Not only does it have a powerful 20-volt electric power system, but you even get a 3-year long warranty with it that is always great to have. But if you just want durability and reliability, you can go with the Milwaukee die grinder as it offers an excellent build quality. Its 18-volt power system also comes with a 5-year long warranty that is the best when compared with other options out there. If you are on a budget, you can go with the Ingersoll Rand die grinder as it is the cheapest option present in this article. While it is a pneumatic one, its ⅓ HP motor should be more than enough for the given price.
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