Choosing the Right Air Die Grinder

December 12, 2020 9:00 am

What purpose does a pneumatic die grinder have in a machine shop? These tools are quite versatile and thus a beneficial addition to your tool collection. Whether you need to enlarge existing holes, smooth rough edges, clean up shaft ends, or rework dies, die grinders, in this case air die grinders, will help you get the job done.

Pneumatic vs Electric

Pneumatic die grinders are a better choice if you are looking for a lighter tool and are okay with an operation a bit on the louder side. It is important to keep in mind that the air tool relies on the capacity of the air compressor powering it. In other words, if it is a heavy-duty job, with a heavy-duty air grinder, you’re going to need an air compressor that can support it.

Additionally, if you decide to go the pneumatic tool route, you will have to factor in the price of the accessories that go along with it, like an air hose and air compressor.

Electric die grinders are a better option if you prefer working with a quieter tool that is corded and a bit on the heaver side. Electric tools are often heavier than their pneumatic counterparts because they run with a motor.

If you plan to use a die grinder frequently, keep in mind that they can overheat from overuse, so you might soon be in the market for a replacement.

Angle vs Straight

There really are no pros and cons to each type of die grinder because there is literally no functional difference. Here is a bit more about the minor difference in structure.

Angle die grinders are built with a right-angle structure, so that the die grinder itself is perpendicular to the body. The point? They are perfect for conditions where a straight die grinder cannot fit. So, if you are working on a uniquely shaped part, or you need to bend in the workpiece, an angle die grinder is the right tool for you.

Straight die grinders are completely straight. The die grinder itself sits atop of the body creating one straight line. This style of air grinder can be a bit long, so they are best for setups that don’t require a tight squeeze.

The images below will better depict the concept.

Recommended Models

There are different brands and models on the market, here are some models to consider.

Ingersoll Rand 5102MAX Air Die Grinder

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The Ingersoll air die grinder has an enhanced grip design to increase operator comfort and support extended usage. The low-profile throttle lever reduces hand fatigue and the built-in lubricating wick increases angle gear life. With a powerful 0.4 HP air motor that delivers 20,000 RPM, expect faster material removal.

CLECO DOTCO Right Angle Sander/Grinder

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This right angle die grinder features a proven combination of a 0.4 HP (0.29 kW) motor, 20,000 RPM and a 1/4″ collet. Perhaps the most popular die grinder in the Cleco-Dotco lineup, this model is compact and lightweight yet powerful enough to remove material fast.

DEWALT Die Grinder, Straight

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This air die grinder features a lightweight aluminum body with an ergonomically designed cushion grip for user comfort. It has a touch control trigger for easy user control and a safety throttle lever for protection. The grinder offers rear air exhaust to direct away from the tool and operates at a speed of up to 25,000 RPM.

Chicago Pneumatic CP9111Q-B Heavy Duty Straight Die Grinder

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This is a quiet and powerful straight die grinder with a powerful 0.47 HP motor and maximum speed of 22,000 RPM. The tool also features an easy-access speed regulator, rear exhaust, insulated handle grip and lock-off throttle.

Astro Pneumatic Tool 3pc Die Grinder Kit

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This set includes a lever throttle for feathering control, a rib textured handle which provides a firm grip and a rear exhaust air flow system that directs air away from work surface. Additionally, the increased motor size provides more power to make work much easier.

And be sure to take care of your tools by using air tool oil. This will ensure that your tool lasts a long time. You can learn more about that process in Keep Your Air Tools Rust-Free with the Right Oil.


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