RS ceramic grinding media


RS Ceramic Polishing Media

  • 1. the most commonly used ceramic media for deburring for most metal material
  • 2. Durable wearing performance
  • 3. Suitable for vibratory finishing machinery and most machine

RS ceramic grinding media is produced by mixing porcelain, kaolin,clay, river clay together with brown alumina oxide 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.

ceramic media for polishing


Ceramic tumbling media is a round or cylindrical material added to barrels to improve tumbling action. It is reusable, easy to clean, and very durable. Known for its durability, the ceramic media lasts through many tumbling cycles and is suitable for vibratory and rotary tumbling.

While in the past, plastic deburring media were used to cushion the stones and reduce damage during tumbling, with time, people have moved on to the more advanced method of using ceramic tumbling media. There are a few people who still prefer plastic pellets over ceramic media but face a common issue. Plastic pellets are suitable only for rotary tumbling.

Ceramic tumbling media acts as an absorbent between the forceful impact of stones in a barrel and works well with vibratory and rotary tumblers. Think of it as a cushioning that reduces cracking of stones.

What is Cushioning?

If you’ve ever tumbled a batch of freshly polished stones and opened the barrel to find stones with chips and fractures around the edges, listen carefully. This is called bruising and it happens when the stones put in the same container rub against or hit each other with force.

Cushioning is the process of adding media to the barrel other than the stones to prevent them from hitting one another as often. The media also slows down the stones and reduces their impact when they do hit one another.

crusioning of ceramic tumbling media


Ceramic Tumbling Media Example

To understand the concept of ceramic tumbling media better consider the following instance–

A child dives into a ball pit with high impact. As the pit is filled with balls this impact is absorbed and distributed among the balls to prevent the child from bruising. From the point of contact, the energy is transferred to the adjacent balls and it spreads to all the balls in the pit distributing force evenly. This protects the child from hitting the floor and even if they hit the floor it is with very less force.

Similarly, using ceramic media in the barrel can have the same effect on the stones rotating inside the barrel.



How to Use Ceramic Tumbling Media?

Out of the different types of media, ceramic media has a relatively high density. It can be used for grinding and polishing metals like steel and titanium. If you mix ceramic media with stones, separating them with your hands at the endpoint can be very time-consuming. To save time and effort, follow these simple steps to successfully separate media from stones.

tumbling media separation parts

Step 1: Dry all the Tumbled Media

This technique works best if the stones and media are dry before entering the classifier. Spread the mixture on a thick towel after tumbling and let it soak the water off the mixture. If you collect small stones this is where you can easily sift through the tumbled stones and media for gems.

Step 2: Place a Classifier Over a Plastic Bucket

Once you’ve set them aside to dry, place a classifier on a plastic bucket. Make sure it is steady and does not flip over when pressurized. Pour in the mix of dried stones and media into the classifier.

Step 3: Shake the Classifier Gently

After emptying all the tumbled stones into the classifier give it a tap or shake it gently to avoid spilling the content on the ground. This allows the media and tiny stones to fall into the bucket. To thoroughly separate the mix, use your hand to softly move the material on the classifier.

Step 4: Media and Tiny Stones are Removed

Softly moving the mixture with your hand pushes through the remaining small stones and ceramic media into the bucket.

And in four simple steps, you have a classifier full of stones and a bucket full of polished media ready for next use.

ceramic media polishing


Materials that Need Cushioning

Two types of materials need ceramic media cushioning, they are:

  1. Materials that Chip or Bruise.
  2. Materials that Cleave.

Materials that bruise or chip easily when they rub against each other include crystalline quartz and glass. Adding ceramic media in the barrel can reduce the extent of this damage.

Fluorite, Topaz, Moonstone, and Amazonite are stones that cleave easily and are very difficult to tumble without splitting. This problem is solved with the help of media cushioning.


Benefits of Ceramic Tumbling Media

Ceramic media features greater longevity with a low purchasing cost that makes it a great metal finishing solution. The cushioning it provides absorbs the impact energy between stones in the barrel preventing them from being damaged when tumbled. With the right blend of media of different sizes (particle size balancing), you can minimize common issues such as lodging and separation.

Ceramic tumbling media also allows the rocks in the barrel to tumble better at the same time facilitates polishing and grinding.

So, in a nutshell, the benefits of ceramic tumbling media include–

  • Longevity
  • Cost-Effectiveness
  • Flexibility
  • Minimizes damage

ceramic media deburring parts and separation


What Sized Ceramic Tumbling Media Works Best?

Here is a guide on how you can choose what’s best for you.

Particle Size Balancing

Filling the barrel with big chunks of media does not solve tumbling problems. To successfully tumble a barrel, it is important to have maximum points of rock-to-rock contact. This can be achieved by adding the correct range of different sized materials in the barrel.

For example, if you add a few golf balls in a box of bowling balls it will increase the points of contact. However, when you add marbles to the same box instead of golf balls, this increases the number of points a lot more.

So, we suggest using small and large pieces of ceramic media because having different sized media works best when tumbling the barrel.

ceramic media deburring


The Bottom line

Over the years people have advanced to ceramic tumbling media for cushioning. This is because ceramic media can be used with vibratory and rotary tumblers. However, this type of media is practical only if you’re tumbling fragile rough.

Finding the perfect proportion of ceramic media (small and large) to use is important to ensure you get what you need.

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