Milling Media Selection for Planetary Ball Mills

Posted by MSE Supplies Admin on

There are several factors for choosing milling media for planetary ball mills. 

  • For instance, the media of choice needs to be a harder material than the sample being processed.
  • One also needs to consider the initial and final particle size of the sample. Small media does not efficiently break up large sample particles but small media is needed to reduce the sample to a finer powder (please see our related article on ball media sets).
  • If you are doing wet grinding the pH of the solution needs to be known since some media is dissolved by either acidic or basic solvent or both. Some media such as Yttria Stabilized Zirconia (YSZ) is acid resistant while Tungsten Carbide (WC) is resistant to both acidic and basic solutions. 
  • If contamination of the sample is of concern, then YSZ is the best choice because of its low wear rate. It is recommended that the milling media and the planetary mill jars be made of the same material but there are exceptions to this rule.  
  • Additionally, cost is always a factor, if the above conditions are met and the final factor is cost, alumina milling media is a great choice.

MSE Supplies offers milling media in sizes from 0.1 mm to 30 mm in diameter.  We also offer cylindrical milling media too such as the YSZ cylindrical milling media.  If you don’t see the product you need, please contact us for custom orders. 


 MSE Supplies  ( is a major supplier of planetary ball mills, planetary ball mill jars, and milling media. We offer a wide variety of materials for your ball milling needs, such as Alumina, grade 304 and 316 SS, Agate, Yttria Stabilized Zirconia (YSZ), and Tungsten Carbide.  Please visit our online store to purchase your ball milling products through this link today.

 If you would like to get custom media sizes or if you have any questions, please email us at


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