RKS Deburring Plastic Media

RKS Plastic media is preformed plastics, the other workhorse media, are also available in a variety of grades or bodies, with some manufacturers having nine grades while others have as few as three.

This media is formed by bonding abrasives (generally 40-70% by weight) into polyester, usually by casting. After casting, this media is typically pre-tumbled to remove flash. The plastic media is sofer, has a lower density than preformed ceramic media, providesa cusioning effect, and sometimes has a shorter life. It is well suitable for finishing softer metals and fragile parts, achieving pre-plating requirements, and producing smooth finishes as low as 5 micrometers. During finishing the matrix which is softer than the abrasive, is eroded, leaving the abrasive to perform the desired work, While some users believe it assures parts free of impingement, this is not ture, All the mass finishing processes expert for fixtured or compartmentalized operations allow part-on-part contact. Plastic media can also be produced in a wide variety of desirable shapes. In practice over a decade some shapes go out of favor and new ones emerge.

Inovatec noted that the plastic media provides no surface hardening of the workpieces. In addition, plastic media is also quiter than abbrasive chips.

tumbling media for plastic part

Deburring is very important to many material parts, and there are specific media suitable for each material for effective deburring and surface finishing.

In this guide, we are going to walk you through three major ideas:

  • How plastic deburring media works
  • Plastic deburring media and vibratory finishing machines
  • Benefits of Plastic deburring media

But before then, let’s have a brief introduction to what plastic deburring media is.

Plastic deburring media is one of the mass finishing media. It is an artificial finishing media in different shapes and various sizes. The fact that it has a plethora of abrasive content makes it suitable for different purposes, including deburring aluminum, zinc, brass, etc. It mostly works for soft surface finishing.

How Plastic Deburring Media Works

The plastic media can be either polyester-based or urea formaldehyde-based, and it’s usually used in a vibratory machine. It’s essential to mix abrasives with plastic media when you’re doing finishing. You can use abrasives like silica, silicon carbide, zirconium, and aluminum oxide when doing soft finishing.

Also, you can use either sands or silica for deburring soft metals. Likewise, aluminum oxide and silicon carbide are suitable for hard metals. But silica remains the most used abrasive. The finishing quality of plastic media depends on the measure and the abrasive you’re using.

plastic media vibratory finishing

Plastic media are so flexible that you can alter the cutting power as desired. But the higher the cutting power, the more the media is prone to wearing.

Moreover, shapes are highly relevant when you’re using a finishing media. And plastic media come in different shapes and sizes like pyramids, cylinders, cones, sharp-edged stars, etc. It would be best if you used a media shape that suits the shape of the material part you want to finish. In most cases, cylindrical, oval, and round shapes are suitable for the material.

In the case of hidden, inaccessible parts, use triangular, arrowhead, and tri-star media shapes. This works well for better finishing, but the problem is that they chip and wear too quickly. Cones work well for parts that have holes also.

Sometimes, your work would be on surfaces with complex shapes. In this case, use varieties of plastic deburring media shapes. This helps you to achieve an effective part finishing.

plastic tumbling media

Plastic media is perfect in deburring aluminum die-cast parts within an hour or two. While deburring, the compounds mop off the lubricant of the machine you’re using. And it takes the same time as the media uses to finish the machine part.

Some companies prefer using plastic bead media for deburring because of smooth, unaltered surface texture results. Remember that it’s soft compared to other media. Consequently, it allows deburring of parts made of delicate materials like plastic, zinc, and aluminum without altering the next surfaces.

precision parts surface finishing

Furthermore, plastic deburring media fits for deburring brass and aluminum parts, smoothening of plastic and rubber, and deburring of edges of softer materials.

Use this media after the ceramic deburring media, as it’s mostly suitable for secondary finishing.


Plastic Media and Vibratory Finishing Machines

The vibratory media has the look of a tub which rotates and vibrates to clean all parts of workpiece. It’s the most effective for deburring, descaling, rust removal, etc. Examples of the vibratory finishing machines are Vibratory Tumbler and Rock Tumbler, Aluminum Wheel Polishing Machine, CWS Series Spiral Tube Vibratory Finishing Machine, Vibratory Finisher, Vibratory Polishing Machine, Industrial Vibratory Tumbler, Vibratory Deburring Machine, and Vibratory Tumbling Machine.

plastic media vibratory deburring

Out of all the types of vibratory machines above, the Vibratory Deburring Machine works well with the plastic deburring media.

A typical vibratory finishing machine has a ring chamber or a container holding both the parts and the tumbling media together. Once you start it and the rotator starts to vibrate, the tumbling media and the workpieces hit each other repeatedly. The purpose of the collision is to have a clean surface.

Plastic media and vibratory finishing machines are the most compatible. Vibratory finishing machines give you smooth finished surfaces. It’s suitable for deburring and fit for threaded parts. In this case, using plastic deburring media would complement the operation of the vibratory machine.


Benefits of the Plastic Deburring Media

Available in Various Shapes

One of the benefits of using plastic media is that it enables smooth finishing of parts because of the shapes. You can even decide to use all the shapes when required.

plastic deburring media

Safe to the Environment

Nowadays, we should always consider the environment when producing anything. Plastic media is an impressive and result-inclined technology that saves the environment from the dangers of plastic, yet very useful to human inventions.

Take a look at it, plastic media is from the crushed, ground, and graded recycled moldings. This keeps the environment clean and safe from wastes that should have littered it.


You would like to go for what would give you good quality and fast results without fear of breaking abruptly? The plastic media remains your best resort. It’s economical in every essence of the word. The type of media does not break, and it stays the way the manufacturer made it for a long time.

Available in High and Low Densities

You can get the plastic media for deburring and other purposes in either high or low density. This is made to meet your expectations as to performance.

plastic parts vibratory deburring


Let’s recap. Plastic deburring media is versatile in terms of shapes and sizes. The shape of the part always determines the shapes you’re going to use.

You can derive a lot of benefits from using plastic media. Amongst other benefits, this media is economical, safe to use to the environment, and available in various shapes and sizes.

Now it’s question time. What’s material part is the best for plastic media?

Don’t you worry, you feel free to read again before answering the question. Also, if you have any questions, don’t hesitate to reach out to us. We will provide the right answer to every question about this topic.


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