6 Best Welding Die Grinders [Buyers Guide 2020]

Last Updated on September 2020

The importance of a die grinder in welding operations cannot be understated. These handheld devices come in handy in honing, polishing, grinding, machining or sanding material in the warehouse. However, with many products in the market, finding the best die grinder that perfectly suits your welding needs is not a walk in the park.

In this review, we are going to discuss die grinders in depth, and what makes a pneumatic die grinder superior. To do this, we will examine ten of the best die grinders in the market. You can also expect an informative buyers` guide section to help you understand the basic handling, safety and maintenance of these highly versatile and important devices.

6 Best Welding Die Grinders

Ingersoll Rand ¼’’ Air Grinder 3107G

Specifications

  • Award-winning, well proven ergonomic design
  • Contoured grip for increased comfort
  • Weighs 1 pound for ease of use
  • Measures 6.6 inches thus making it highly compact and portable
  • Comes with a high-quality ball-bearing construction

Almost all products from Ingersoll Rand are guaranteed performers. Luckily, the Ingersoll Rand ¼’’ 3107G is no different. Despite its relatively small size, this air grinder is a top performer that can get most polishing and edge softening operations done. You don’t have to worry about excessive vibrations that compromise on your grinding experience, the Ingersoll Rand 3107G comes with heavily fitted rubber that minimizes vibrations while also improving overall comfort during use.

Pros

  • Ideal for cutting, polishing and grinding tough metals
  • Heavy duty thus capable of performing industrial tasks
  • Its ball bearing construction makes the device increasingly sturdy and compact
  • High performance with 27,000 rpm
  • Ideal for long term work without breaks due to its rugged design and rubber grip

Cons

  • The collet arrangement is not the best and can prove hard to tighten up and the wrenches are relatively thin.

 Chicago Pneumatic CP875 ¼ inch- Pneumatic Right Angle Pistol Grip Die Grinder

Specifications

  • Made from lightweight but highly durable aluminum
  • Comes with a burr angle that is perpendicular to the entire tool
  • Comes with ¼ inch as well as 6mm collects
  • The 90 degree inclined head provides enhanced flexibility in hard to reach or tight spot
  • Boasts of an air regulator that is in built

Chicago Pneumatic did not disappoint with their CP875 model which is highly capable of performing several grinding, polishing and edge softening operations.  This bad boy is highly versatile as it can also perform metal cutting and sheering operations as well as paint scraping tasks. Its lightweight design allows you to hold it for long when working on your welding projects.

Pros

  • The presence of a lock-off throttle helps to ensure no unwanted or accidental starts occur
  • Boasts of a compact and lightweight design (1.1 pounds) that allows you to use it for several minutes non-stop
  • Affordable
  • Fairly low vibrations compared to other grinders
  • Ideal for high speed smoothing, blending, deburring and porting in confined areas.
  • The head is angled at 90 degrees which increases flexibility when working in small spaces
  • The collet size can fit standard burrs and extensions

Cons

  • Can be noisy compared to other grinders

Dewalt DWMT70783 Straight Die Grinder

Specifications

  • The body is made from aluminum for increased durability and resistance to wear and tear during use
  • Weighs 8 ounces, making it highly convenient for use
  • Pneumatic power source
  • Manages a speed of up to an incredible 25,000 RPM
  • Comes with a rear exhaust that directs keeps the tool and work area clean

Dewalt needs no introduction when it comes to the manufacture of durable and heavy duty warehouse equipment. The Dewalt DWMT70783 boasts of an ergonomic shape that not only increases grip but also improves overall comfort during use. It is constructed with tough aluminum body and is ideal for use by both experts and beginners. Impressively, you don’t have to worry about manufacturer`s fault as this bad boy grinder comes packed with a 3 year limited warranty.

Pros

  • The air exhaust is positioned towards the rear thus keeping the working area as well as the grinder clean
  • High performing as it can manage 25,000 rpm
  • The presence of a touch control trigger makes it fairly easy to use the device and maintain control throughout
  • The ergonomic design allows users to work for long without fatigue creeping in
  • Lightweight and compact for increased portability
  • Comes with a 3 year warranty which protects your investment
  • Boasts of a safety throttle lever for increased safe operations

Cons

  • Might require some getting used to, especially for beginner welders or warehouse operators

Ingersoll Rand 301B Air Angle Die Grinder

Specifications

  • Precision gearing of 0.25 HP at an impressive free speed of 21,000 rpm
  • Comes with a durable ball-bearing construction that helps to improve balance while reducing vibration
  • Comes with a strong and highly capable aluminum housing that enables the device to withstand tough operations
  • Lightweight (1.02lbs) for ease of moving around
  • Comes with a front exhaust

The Ingersoll Rand 301B Air Angle Die Grinder is among the best grinders in the market. This versatile tool boasts of a neat, compact design to allow for increased mobility. It also boasts of a right angle configuration mechanism that allows you to access those hard-to-reach tight spots. It allows you to grind, de-burr, port, break those sharp edges and polish literally anything

Pros

  • The ball-bearings help increase usability through improved balance and reduced vibration
  • Made from strong aluminum material that guarantees durability and long term usage
  • Easy to use
  • Comes with a safety lock that prevents accidental or unwanted start up
  • Comes with a front exhaust that ensures your work area remains clean throughout
  • Lightweight and easy to move around during use

Cons

  • Requires an average of 6CFM and a 24CFM at maximum load, meaning a light duty compressor might not be sufficient

Ingersoll Rand 3101G Edge Series Air Angle Die Grinder

Specifications

  • Comes with a ball bearing construction
  • Lever throttle is self locking
  • Rear exhaust
  • Ergonomic grip
  • Weighs 1.3 pounds and is pneumatic-powered

Regardless of your experience in welding or metal fabrication activities, the Ingersoll Rand 3101G is a priced asset that will add great value to your arsenal.  The die grinder boasts of a ball-bearing construction that is both lightweight and sturdy. It is also highly comfortable due to its ergonomic grip that increases torque accuracy as well. You can use this heavy duty grinder for grinding, polishing, deburring, porting and weld breaking.

Pros

  • Ideal for grinding, cutting and polishing hard-to-reach spots
  • Comes with a one-year warranty
  • Boasts of a contoured grip that allows for greater working control
  • The ergonomic design allows for increased torque accuracy as well as comfort
  • Compact (6.8’’) and lightweight (1.3 pounds)

Cons

  • The safety latch can stop working thus forcing users to disable in order to continue

Astro 1221 Die Grinder Kit with Rotary Burr Set

Specifications

  • Comes packed with 8-piece carbide rotary double cut burr set
  • Composite handles
  • Ribbed texture
  • Lever throttle
  • Build in regulators

Not too many sets in the die grinder market compare to the Astro 1221. This set gives you uncompromised versatility as you can cut, clean and even polish your metals with relative ease. It comes with tow grinders, a 90 degree and a 0-degree grinder. Of course the 90 degree grinder allows you to work on those hard to reach areas. Both grinders come with standard triggers that are located on the sides to ensure that your application is smooth.

Pros

  • Highly versatile set that can perform several functions on heavy metals
  • The composite handles help to reduce overall vibration and increase user control
  • The ribbed texture increases your grip, making it firmer on the device
  • Feather control is possible since the grinders each have lever throttles
  • Built-in regulators that make it possible to manage grinding speed.

Cons

  • The exhausts are located at the front

Die grinders are highly versatile rotary tools that help you perform various grinding tasks on different surfaces whether metal, wood or even plastic. Pneumatic die grinders are powered by pressurized air that is usually stored in an air compressor. A pneumatic grinder is among the most versatile tools you can find in a warehouse.  To put your pneumatic grinder to different use, all you have to do is insert the burr bits or extensions and voila, you can you can grind, clean, sheer, cut, polish and do literally anything to your metal surface.

You don’t have to be an experienced engineer or top-notch metal fabricator to use a die grinder. These tools can come in handy in DIY workshops helping you to shape up or grind die. You can use these bad boy devices to shape metals or plastic if you are an art enthusiast. It is hard to find any professional workshop without a die grinder. DIY enthusiasts are not being left behind either, especially once they learn the several benefits associated with owning one or several of these grinders.

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The Functioning of a Die Grinder Explained

As a pneumatic tool, a die grinder relies heavily on the air compressor for proper functioning. Here`s how a pneumatic die grinder works.

A high-pressure air stream is made in the grinder`s compressor. Afterwards, through the rubber hose, the high pressure stream is sent to the grinder. Upon reaching the die grinder`s inlet, the air makes it way to the rotary chamber where the pressure energy is efficiently transformed into useful rotary power. The rotary power, in turn is exerted to the surface through the collet. Not rocket science-right?

Here`s an interesting fact, did you know that dentists use die grinders? The collet is a hugely important part of a grinder that plays the role of holding the burr extension such that they rotate very fast to allow for cutting, slicing and grinding through tough materials such as metal.

The excess air is usually vented through an exhaust that is more often than not located at the rear of the device. It is not unusual for die grinders to heat up due to the impact of the strong pressurized steam and the ridiculously high rpm speeds. As a result, we advise taking breaks in between using these devices to allow them to cool.

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 Buying Guide: Things to Check for When Buying a Pneumatic Die Grinder

As you must be aware by now, die grinders are highly versatile and can be put to virtually any task depending on the outcomes you want to achieve. Be it industrial welding, sculpting, basic DIY tasks or even art, a die grinder is a go to tool that will help you get the job done, and with relative ease!

So what are some of the key things that you should be on the look-out for when buying die grinders? Read on to find out.

Extensions and Burrs

Here`s an important fact to keep in mind, your grinder`s extensions determine its overall versatility! Always check on the collet`s diameter of the grinder you want to purchase. Normally, standards collets usually measure 0.25 an inch. Most burr extensions are often sold as a set of eight.

If you are lucky, you can get the set of eight burr extensions included in your box, however, this is often very rare, not unless there is an offer or something close to a discount. As a result, you should be prepared to fork out extra dollars to get a burr set. Luckily a standard set of 8 wont set you back too much as these accessories are usually affordable. In the set, you will find metal grinders and sanders that come in different diameters and angles.

You can use your grinders to shine or polish surfaces with ease. A 90-degree grinder is highly convenient for polishing tasks as you can apply increased pressure to the backside of these metals therefore increasing the overall quality of the shine.

You can also select from a variety of sending extensions that can be easily inserted in the grinder`s collet. A pneumatic die grinder is your best friend when it comes to fine sanding difficult hard to reach areas.

Did you know that with the right burr extension you can transform your die grinder into a highly efficient engraving tool? Jewelers love working die grinders for their versatility, and you should too!

Burrs and extensions are crucial to the functioning of your die grinder. If you are starting off, we recommend buying the standard 8-piece extension set. Afterwards you can continue buying the extensions you need as you gain experience.

Size of the Grinders

Since die grinders are hand-held devices, you want to buys a grinder that is compact and lightweight to allow for ease of handling. Ideally, most of grinders are usually designed to be small and compact so as to make increase or improve overall usability. However, industrial die grinders tend to weigh more than DIY grinders for simple projects due to the more power rotors and power compressors.

Pen die grinders are also an important consideration if you want that extra level of precision in your respective task. Pen grinders, despite their small size, can manage impressive speeds of up to 40-60 thousands rpms. However, you should expect to spend more on these tools due to high level of precision.

Collet Angel

Die grinders essentially come in two major angles, a 90-degree angle and a 0-degree angle. 90-degree angle grinders come in handy when targeting those hard to reach spots as well as difficult corner, more so on metal material. Welders and metal fabricators prefer working with 90-degree grinders and work really well when used with circular extensions meant for polishing.

O-degree grinders, on the other hand, have their collets positioned linearly. You can attach small saws and cut into tough metals or surfaces using 0-degree grinders. It is easier to control a 0-degree pneumatic grinder, which makes it ideal for beginners or intermediate users. If you are a beginner in the use of these highly versatile bad boy warehouse tools, we recommend starting with 0-degree grinders as they are easier to maneuver and more direct to use. For more on metal angle positioners [read our in depth review]

Ergonomic design

Always check on comfort when buying a grinder. A good grinder should have a ribbed and comfortable handle that will help to absorb vibration and enhance your overall precision. Thus, as you check as elements such as weight and exhaust position, it is also advisable to check on how the grinder fits your hand, and whether you can use it for several minutes non-stop without compromising on your comfort.

Housing Material

Most die grinders are made from aluminum material to increase durability. Never assume that a casing is aluminum until you confirm. Remember, a die grinder is a handy tool that should serve you for years non-stop, so the harder the casing, the higher the chances of increased durability.

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 Safety Tips when using Pneumatic Die Grinders

Protect Exposed Skin

You should never operate a pneumatic air grinder without a glove. The heat that emanates from the pressurized air can leave your hands severely burned. Also, wearing a fire-resistant protective suit will increase your overall safety and prevent the chances of getting burnt by sparks.

Put on a Respirator or Paper Mask

If your task entails cutting or splicing tough metal that disintegrates into tiny splints, then your mouth and nose will need adequate protection. Inhaling the fumes produced can also lead to complications, especially over time. For more on brathing safety respriators [Click to read our guide]

Safety Goggles

You need to protect your eyes, since, without proper eyesight, it will be impossible to use the pneumatic grinder in the first place. Always put on a pair of safety goggles to protect your eyes from particles and sparks.

Hearing Protection

You will be shocked at how these tiny devices can be loud. As such, you should put on hearing protection, especially if you plan on cutting or grinding hard materials like metals for long durations.

Amazon

There are several places to buy welding die grinders for metal fabriaction. For worry-free return policies, transparency in product quality and customer service, and fast shipping, head over to Amazon.

When you browse on Amazon, you can see what previous buyers thought of the product they bought and everything about material quality, protective features, weight dimensions, and design before adding anything to your shopping cart. You don’t need to go out to compare prices or features.

If you have any sort of problems with your sheet metal brakes, you can also quickly and easily return them hassle-free.

Besides discussing ten of the leading pneumatic die grinders in the market, we have also shed light on how these highly versatile warehouse tools function. Choosing the right die grinder depends on personal preferences as well as the features.

You might prefer settling for a set that comes with both the 90- degree and 0-degree grinders. Alternatively, you can choose one and use your burrs and extensions to make the tools even more versatile.

It is crucial to check on features such as the housing material to ensure durability and also consider the overall design to determine comfort. Remember to always settle for lightweight die grinders as they are easy to hold for long periods.

Even more importantly, remember to prioritize safety and gear up adequately when using pneumatic die grinders.

 


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