RPM ceramic grinding media

RPM Ceramic Polishing Media

  • 1. Faster cutting performance with general surface removal
  • 2. Excellent surface roughness produced
  • 3. Suitable for fast speed surface grinding and cutting

RPM ceramic grinding media is produced by mixing porcelain, kaolin,clay, river clay together with special high cutting performance abrasives. The wet material is formed into desired shape (usually by extrusion and cutting) and then fired to vitrify. Fusion bonding is used to make some media. Such media are available in a wide range of shapes and sizes. Also, when the engineer selects the proper grade of abrasive, the correct proportion of abrasive to binder, and the most suitable binder, this media will adapt to a great variety of application, and workpieces.

The binder acts as a burnishing surface, and this works against rapid cutting.

Vibratory deburring machines, also known as vibratory tumblers, greatly speed up the deburring process. Using these machines is simple. Place the parts in the tub containing deburring media and turn on the machine to activate the vibrations. After a while, the parts will be deburred, meaning they’re clean and ready to ship. However, easy as the process seems, you need to put some thought into the deburring media you use.

Deburring machines come in various sizes. Their bowl-shaped design enables the machines to dislodge dirt and rust from otherwise difficult to access areas of delicate parts. Vibratory deburring machines achieve this by shaking unfinished parts together with deburring media.

What Is Deburring Media?

Deburring media is the abrasive material you fill the bowl or tub with. The media is available in a variety of materials, sizes, and shapes; it performs several functions in the process of deburring metal, plastic, and ceramic parts: 

  • Separating the parts
  • Burnishing the surfaces
  • Deburring
  • Polishing

Many factors, such as the characteristics of the parts and the type of finishing you want to achieve, determine your choice of deburring media.

In some cases, you can mix wet compounds into the deburring media to enhance the deburring process by protecting the parts from rust and corrosion. 

Why is Deburring Important for Metal Fabrication Projects?

Deburring speeds up the process of equipment manufacturing and improves the safety of the final products. The process standardizes the shapes and sizes of parts. Unlike manual deburring, which is slow and produces inconsistent results, deburring machinery is efficient and saves costs. 

ceramic media deburring parts and separation

Parts with sharp edges can injure people who handle them. Deburring eliminates these sharp edges and thus improves the safety of handling equipment with these parts. Moreover, deburring prevents the damage and wear of equipment. Parts with sharp edges can damage other parts of equipment when these edges cut other parts or lodge into openings in other parts. Deburring reduces the likelihood of such damage by smoothing these edges.

Aluminum machining parts before and after deburring

Now that you know what deburring is and why it’s important, here’s how to identify the best media for your deburring needs.

Factors to Consider When Choosing the Right Deburring Media

1. The size of the parts

The size and characteristics of the parts you want to deburr are the main considerations when selecting the right deburring media. Larger deburring media are the best choice for large parts because the media quickly cuts the parts’ surfaces and coarsens them. In contrast, small deburring media are suitable for small parts because the deburring media achieves a fine finish without damaging the parts. 

ceramic media for polishing

The parts’ features also factor into your choice of deburring media. For example, if a part has holes, avoid using deburring media that may lodge in the holes and slots. To ensure that deburring media doesn’t get stuck in the openings of parts, choose a media that is at least 70% of the size of the openings. That way, two pieces of deburring media won’t get stuck side by side in the openings. 

2. The shape of the deburring media

Deburring media are available in a variety of shapes, including wedges, cones, spheres, pyramids, ovals, cylinders, and stars. As is the case when selecting the right size, the characteristics of the parts determine the best choice for the shape of deburring media. For example, pyramids, cones, and angle stars are suitable when you want deburring media to reach into openings without lodging in. If you need deburring media that effectively passes through holes, angle cut pyramids are the best option.

ceramic deburring media

3. The material used in deburring media

The characteristics of deburring media vary depending on the material. The material determines the best purpose for the media. Some materials are good for finishing and others are best for removing unwanted edges that occur during machining. The type of metal you’re working on also determines which material to use. Soft and hard metals each require different levels of abrasiveness. 


The following are the main materials used in deburring media.

Plastic deburring media

Plastic deburring media is a common option for soft metals such as copper and aluminum because it achieves a smooth finish with minimal shine. We recommend cones and tetrahedrons for parts with holes. For flats and corners, use triangles.

Steel deburring media

Steel deburring media is suitable for shining, burnishing, polishing and heavy deburring of metal, ceramic, and plastic parts. If you use steel media to deburr plastic parts, you may need an additional step for polishing because the high abrasion resistance of plastic parts results in a matte finish.

Ceramic deburring media

Ceramic deburring is the best option for hard metals and heavy parts. It’s great for operations that require heavy cutting. Ceramic media also works well with plastic parts because plastics need tough abrasion.

Porcelain deburring media

Porcelain deburring media is non-abrasive, so its only purpose is to polish parts. Typically white in color, porcelain media is generally available in cylindrical and spherical shapes. The cylindrical pins are suitable for polishing hard metals such as steel whereas spherical porcelain media works best for polishing soft metals such as aluminum.

Organic deburring media

Organic deburring media includes numerous organic materials, such as corn cob, coconut shells, and walnut shells. The characteristics and purposes of organic deburring media vary from one material to another. We recommend coconut and walnut shells for medium-to-light deburring. For cleaning operations, we recommend corn cob shells because the media absorbs surface oils. Organic deburring media is beneficial because it’s durable, environmentally friendly, reusable, and biodegradable.

Select the Best Deburring Media

By now, it should be clear to that size, shape, and material of deburring media determine which one you choose. Now that you’ve learned how these aspects of a media factor into your decision, you can achieve better results with your deburring operations. 

crusioning of ceramic tumbling media

In addition to keeping in mind these considerations, make sure you get the best results by buying deburring machinery from reputable providers who have years of experience in vibratory finishing and deburring media. Doing so improves your chances of finding affordable and customized solutions that improve your productivity while saving costs.

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