RKX Deburring Plastic Media

RKX 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 softer, has a lower density than preformed ceramic media, provides a cushioning 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 micrometres. 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 true, 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 favour and new ones emerge.

plastic media vibratory finishing

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

It is not uncommon for you to observe small pieces of materials and raised edges attached to workpieces after various machining operations. These pieces of materials are commonly referred to as burrs, which are usually undesired. They are usually removed in a process known as deburring.

loading parts into vibratory finishing machine

Deburring exploits the ability of abrasives to scratch away burrs, machine lines, belting marks, slag, and sharp edges. Deburring smoothens rough surface finishes to standards that are satisfactory for various operations including plating, anodizing, polishing, painting, and many more.

Deburring tools are designed to be used on plastic, wood, copper, nylon and many other non-metallic materials as well as mild steel, mild cast iron, and aluminium. There are various deburring tools, which include: thermal deburring tools; ceramic deburring media; plastic deburring media; to mention, but a few.

In this post, the plastic deburring media is going to be our focus.

plastic media vibratory finishing and deburring

Plastic Deburring Media

Quite a number of people do not like to use plastic as something fit as a prospect for deburring media. It is however interesting to note that plastic deburring media offers quality pertaining to surfaces and is ranked among the best. This is due to its ability to maintain colors of metals, also due to it been unable to peen over burrs. It is a more convenient choice for you when you want to smoothen the surface because it is about 40% less than ceramic deburring media.

Using A Plastic Deburring Media

Plastic deburring media is most convenient for you to use in the smoothening and cleaning of metals such as Zinc, Aluminum, Brass (light metals) and acrylics. It is a good choice for the general removal of metals, cutting of metals and also finishing of pre-plate.

When seeking a deburring media to smoothen plastics, alloys such as brass, metals like aluminum, look no further than a plastic deburring media.

plastic parts deburring in vibratory tub finishing machine

Plastic deburring media is also a great choice when dealing with hard metal parts that have been subjected to deburring before (e.g. ceramic deburring). Therefore, it can be used as a secondary surface smoother. This is made possible due to its lightness in comparison to ceramic deburring media.

Prominent features of a plastic deburring media that you might like are its non-chipping ability, and non-cracking feature. These characteristics make it useful in a machine and die-casting parts. Due to the fact that it has a good surface refinement capability and has less damage on the surface of the metal when compared to ceramic media and it is used to prepare metals for operations like anodizing and electroplating.

steel components vibratory deburring with plastic media

How It Works

Plastic deburring media works by utilizing specifically formed abrasives which help to get the required finishing effect. Abrasives are substances used to smoothen out other softer surfaces through a rubbing effect. They scratch away material surfaces in order to get rid of unwanted roughness and undesired substances.

In the real sense, a plastic deburring media has equal masses of resins and abrasives. That is, one part of resins is used with one part of abrasive with silica being the most commonly used abrasive. Others include aluminum oxide, corundum, and zirconium.

plastic deburring media

These substances differ in their hardness and the choice of abrasive depends on what you want to achieve when using it. By changing its components (abrasives and resins) the capabilities of the Plastic deburring media can be varied.

As earlier mentioned, plastic deburring media is used to smoothen, clean surfaces and get rid of unwanted roughness. They are employed as a component of vibratory machines in a process known as the vibratory finishing process to get the required finishing effect. Vibratory finishing is always done batch-to-batch and a choice when dealing with small workpieces that are in large quantities.

plastic media deburring and smoothing

The process is perfect for dealing with materials that are liable to been ripped or deformed. This can be accomplished due to the fact that the impacts of the material and the abrasive media are equal, which drastically reduce or even eliminate the material ripping and deformation.

Materials to be finished or actual parts are placed with the abrasive media in a container containing an off-center revolving mass. The revolving mass causes the container to vibrate and create turbulence. The tub shakes in a cyclical motion, this motion allows the abrasive media and the materials to be dropped and lifted continuously. Due to this, there is an association of the plastic abrasive media and the metal materials in a manner synonymous with the procedure in normal processing where there is contact between the material been processed and the abrasive media. Therefore, there is smoothing and abrasion of the surface until what is required is obtained.

plastic media deburring and polishing


A series of various coatings on materials can be obtained from the vibratory finishing process. The amplitude and frequency of the machine can be adjusted to create a particular finish. The vibratory finishing process is continuous because several vibratory finishers can be started and used.

Why It Works

Various features have made plastic deburring media immensely useful in smoothing metal surfaces. These include:

  • It is a medium-density deburring device;
  • It exhibits mild cutting;
  • There is a wide range of shapes and sizes which can be selected from;
  • It also has a short cycling time.

Perfection is a virtue we all seek to have in our daily lives and everyday work. This does not leave out those involved in manufacturing processes, and most importantly those involved in the manufacturing of metals.

plastic deburring media

How would you feel if your doorknob does not fit? Or if your house keys fail to open the door it is expected to? These and many more highlight the importance of plastic deburring media which ensures that you live a stress-free life. This is done by adequately smoothening metal surfaces to make sure that the edges and parts are supplied in shapes that allow effective usage.


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