Best Die Grinders 2021

Die grinders are important tools, and as such you need to go for the best. Getting the best will improve the quality of your work as a DIYer or a professional. In this guide, we would be showing the best die grinders. You should read through this guide to find out.

A die grinder is a popular tool in the market, and it also goes by the name straight grinder. Traditionally, it was used to grind metals, but today it is the jack-of-all-trades. Die grinders come with a wide range of bits that are swapped out whenever you need to switch between tasks.

Usually, a die grinder has a 1/4″ collet that is used to hold different bits. The bits include grinding wheels, cutting tips, cut-off wheels, and sanding disks. These bits make these tools very versatile and perfect tools for different tasks. Small units such as pencil grinders and cordless grinders, however, use a 1/8″ collet but they still do a couple of things well.

The best die grinder has incredible power and outstanding RPM speeds. It should add comfort to your life by reaching different places that other big tools may not be able to. Also, die grinders are detailed tools that make them ideal tools for those times where precision is required.

DIE GRINDERS BUYER’S GUIDE

Collet Size

The collet size of a given die grinder simply tells you about its supported bit size. In other words, it is the chuck size or the hex size of a die grinder. You can find the collet size rating of die grinders in inches that is quite similar to other power tools out there. Generally, the collet size includes options like ¼ inch or ⅝ inch.

But as you would have seen all of the options present in this article have a collet size of ¼ inch. This is due to the reason that ¼ inch is a common size.

This means that you can find a wide range of bit options while going with such a die grinder. It allows you to use a given die grinder for a lot of applications and used as per your needs.

Power Type

If you are familiar with power tools like die grinders, then you must know that these can be powered in various kinds of ways. Although, for die grinders, this includes the options for going with either an electric die grinder or a pneumatic die grinder.

But since both of these options are quite good, you should consider both of them before buying a die grinder.

When compared with each other, an electric die grinder is much easier to use and makes for a more practical option. This is due to the reason that an electric die grinder uses batteries for its power that makes it completely cordless and easy to use.

Although, these are generally on the expensive side. Compared to this, a pneumatic die grinder is much cheaper and cost-effective that makes for a great pick for users who are on a budget.

These can offer very similar and even higher power compared to electric ones in some cases. But as you would expect, such pneumatic die grinders need an air compressor to work. This also tethers you down due to an air inlet hose used by such pneumatic die grinders.

Power Rating

Whether you are buying an electric or a pneumatic die grinder, checking its power rating is quite important. This is to ensure that you do not get any performance issues while using a die grinder for your grinding needs. For electric die grinders, this rating is given in volts as 18 volts or 20 volts.

On the other hand, pneumatic die grinders have their motor power mentioned in HP as ¼ HP or ½ HP. As you would expect, for both pneumatic as well as electric die grinder, a higher power rating results in better performance.

Therefore, if you wish to use a die grinder for heavy-duty usage, then you should get one that offers a high power rating and works perfectly for your desired application.

Ease of Use

You may need to pay attention to the ease of use that comes with different models of die grinders. For example, you may want to consider the location of the exhaust vents to ensure that they do not face your body.

A forward-facing vent, on the other hand, helps to keep the working surface clean but it can displace shavings or oil on the working which could potentially create a mess.

Other attributes include safety features that will prevent accidental start-ups, especially when unauthorized people or children gain access to your tool. Some users, however, prefer a simple on/off switch.

You may also want to consider how much a grinder vibrates during operation. Some models tend to vibrate more while working while others don’t. This can be a bother to some people, especially during long-duration work.

The weight of each particular model should also be factored in since doing a perfect job often requires time. This means you’re going to hold and move around with the die grinder the entire time. A lighter grinder is more comfortable to walk around with thus reducing operator fatigue.

Speed Control

Although most operators use their die grinders at full speed, die grinders are designed to allow for speed control depending on the nature of the working surface. You can use a lower speed for soft surfaces such as wood boards.

Harder surfaces require higher speed ratings, but you want to keep within the recommended rate of 20,000 rpm.

Size and Form Factor

A die grinder is essentially a handheld power tool due to its size and form factor. As you would expect, it makes them highly practical and handy for use in small corners and tight spaces if needed. Therefore, you should get a die grinder that is small and compact in terms of its form factor.

Another great thing about such die grinders is that they do not take much space in your garage or tool kit for storage while you are not using them.

Just like the size, the weight of a given die grinder is quite important to check. Generally, any lightweight die grinder can be used for a long time without much of an arm strain.

Warranty

If you want to buy a die grinder that lasts for a long time without any issues, then you should get one with a long warranty period. Generally, these die grinders come with a 1-year long warranty. But in some cases, you can even find options with a 3 year or even a 5-year long warranty.

Apart from the warranty, the build quality of a given die grinder plays another important role while looking for reliable and durable options. This is due to a simple reason that well-built die grinders that come with a long warranty duration are highly reliable and last for a long time.

BEST DIE GRINDERS

NAMES FEATURES WHERE TO BUY
Astro Pneumatic 218 Pencil Type Die Grinder

B000RH36WU

Lightweight and ideal for tight spots

Twist throttle provides variable speed control

Designed for high speed porting and finishing of small parts

Ideal for cleaning of dies, rotors, backing plates, brake pads, mounts plus many other applications

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Chicago Pneumatic CP9104Q Compact Pencil Grinder

B001VXUWSK

3 mm and 1/8″ collets included

Very low noise level: only 71 dB(A)

Includes silencer hose

High free speed: 60,000 rpm

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Neiko 10649A Air-powered Micro Die Grinder

B000K801NI

Precision control due to the lightweight nature and 5-1/4-inch shaft

54, 000rpm speed

1.4cfm average air consumption

Texture throttle

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Milwaukee Die Grinder 2784-20

B06XPM9SGP

The power rating of 18 volts

Collet size of ¼ inch

5-year long warranty

Brushless motor

Excellent build quality

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Dewalt Die Grinder DCG426B

B076S9YBMH

Brushless motor requires no brush changes.

Variable speed rocker switch and variable speed limit switch settings provide options to control the speed of the tool.

LED lights at the nose of the tool provide light for the work surface and area.

Dual-position rocker switch provides user options for multiple handle grasping points.

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Jitterbug 90-Degree 3MM Pneumatic Micro Grinder

B06XNYFFQ4

Equipped with pen needles made from alloy steel

The configuration is great for marking parts and tools

Made of high-quality materials

Air pressure; 90 psi.

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Aircat Die Grinder 6255

B000AYS01C

The power rating of ½ HP

The motor speed of up to 20000 RPM

Collet size of ¼ inch

1-year long warranty

Weighs 1.1 pounds

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Astro Pneumatic Tool Die Grinder 219

B007QV1RGM

The power rating of ⅓ HP

Collet size of ¼ inch

1-year long warranty

The kit of 3 pieces

Comes with 8 rotary burr set

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Makita Die Grinder GD0601

B001ASC73E

Collet size of ¼ inch

1-year long warranty

Offers an AC/DC switch for ease of use

Small and compact design

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Ingersoll Rand Die Grinder 3101G

B000VYZ1HW

Self-locking lever throttle

Grease fitting for increased angle gear life

Rear exhaust

Ergonomic grip

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Astro Pneumatic 218 Pencil Type Die Grinder

B000RH36WU

This is an eighth-inch pencil grinder with a lightweight design ideal for tight spots. It runs at free speeds of 56,000rpm hence porting, and finishing of small parts becomes easy. There is also a convenient way to control speeds using the variable speed throttle. This versatile tool is a handy model and suitable for cleaning brake pads, rotors, mounts, and dies among other surfaces.

PROS CONS
Has speed throttle to control the speeds none
Durable construction for results
Lightweight for ease of operation
Runs at free speeds of 56000rpm

Chicago Pneumatic CP9104Q Compact Pencil Grinder

B001VXUWSK

This is a compact but very powerful pencil grinder that will allow you to perform all your grinding tasks within minutes. When you need to access tight spots, this is the grinder to buy because it has a long flexible hose. It is built with an easy to use design to give you easy control and do all your tasks with ease.

Furthermore, it is equipped with reliable speeds of 60000rpm to enhance fast porting. This grinder provides you with a quiet operation with noise levels of 71dBA.

PROS CONS
Easy to set up for use none
Runs at speeds of 60000 rpm
Durable construction for long-term use
You will control it quickly for your work

Neiko 10649A Air-powered Micro Die Grinder

B000K801NI

With a free airspeed of 54, 000rpm, the Neiko pencil grinder easily glides through surfaces and delivers air pressures of 90 PSI. The throttle is textured and features a self-adjusting speed lever. This simply means the speed will stay constant until you decide to increase or reduce it. It is a versatile pencil grinder ideal for cleaning jewelry, brake pads, backing plates, cylinder heads, dies, rotors and mounts. Overall, the lightweight design and 5-1/4-inch shaft ensure precision control when you polish, grind, or cut.

PROS CONS
You can adjust the speeds using the textured throttle none
easy to handle
Lightweight model for easy operation
Durable construction for long-term use

Milwaukee Die Grinder 2784-20

B06XPM9SGP

Milwaukee’s 2784-20 die grinder is a very durable and reliable option. 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.

PROS CONS
High grip and ergonomic handle design Slightly on the expensive side
Most reliable and durable die grinder mentioned here
Offers decent performance with the 18-volt battery system

Dewalt Die Grinder  DCG426B

B076S9YBMH

This Cordless Die Grinder offers a longer motor life and requires no brush changes. Its variable-speed rocker switch gives you the control to get the speed you need for the job. And, with its dual-position rocker switch, you can choose from multiple ways to grasp the handle.

PROS CONS
Comes with various controls and adjustments A bit large and heavy
Great value for money for an electric die grinder
Offers high performance with a 20-volt battery system

Jitterbug 90-Degree 3MM Pneumatic Micro Grinder

B06XNYFFQ4

The pen needles are made from unique alloy steel that is resistant to rusting to increase durability and performance. This pen grinder works great on porcelain, stone, metal, glass, wood, and many more hard materials. Besides, the configuration is great for marking parts, tools, and many more.

The unit is made of high-quality materials that enhance optimal performance and durability. It is built with a compact and lightweight design that enhances easy carrying and control. Additionally, it is perfect for cleaning and polishing jewelry, cylinder heads, dies, and many more items.

PROS CONS
Built with a compact and lightweight design none
Versatile grinder for more reliability
Free airspeed; 80000 rpm

Aircat Die Grinder 6255

B000AYS01C

AirCat 6255 is the go-to grinder for anyone who wants remarkable quality for everyday tasks. It is known for its outstanding internal construction, i.e. bearing surfaces, air chambers, and turbines that remain unaffected for an extended period. Also, it boasts of its patented silent technology which provides a quiet operation given that this is a heavy-duty power tool.

PROS CONS
The feather trigger design for improved speed control. Not as powerful as other alternatives.
Conveniently short to get in the tight spots It tends to stall when the pressure level on the compressor drops.
Quiet operation.
The ergonomically designed handle helps to reduce operator fatigue.
Very little exposure to dust and debris.

Astro Pneumatic Tool Die Grinder 219

B007QV1RGM

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.

PROS CONS
Offers both straight and right-angle tools Build quality could have been better
Complete set with two tools and a burr set
Decent performing pneumatic tools

Makita Die Grinder GD0601

B001ASC73E

Makita GD0601 combines power and easy-to-use features to improve performance. Its innovative design enables the motor to run cooler under continuous use while also locking debris out of the internal chambers, thus extending the life of the grinder. The AC/DC switch allows for alternative power sources depending on the task at hand. It is a surprisingly light tool with a wide range of grinding jobs.

PROS CONS
It runs quietly. Cord material is not as durable.
It comes with high heat resistant vent slots. Fixed speed.
Solid aluminum housing for longer tool life.
It features a powerful motor that can deliver up to 50% more torque
It is entirely sealed against dust and debris.

Ingersoll Rand Die Grinder 3101G

B000VYZ1HW

This powerful, 20000 rpm die grinder is ideal for finishing. The angled shape lets you get to those hard-to-reach places with a 1/3-horsepower motor, a 1/4-inch collet, a rear exhaust, and a self-locking throttle. A grease fitting allows you to keep the gears properly lubricated. An ergonomic grip makes the tool comfortable to hold and use. Use the 3101G in various applications including cutting, porting, weld breaking, deburring, polishing, and grinding.

PROS CONS
Great performing ⅓ HP pneumatic motor Build quality is on the average side
Offers a 1-year long warranty for peace of mind
Highly affordable die grinder for a high value for money

CONCLUSION

If you’re on the market for the best die grinders, then look no further than our list above. These are the best pencil grinders on the market to get the job done. They are well-rated and best placed to offer you a good deal for your money.