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Alumina Grinding Balls


Raw Materials (Japanese Alumina)
MOH(Mpa) 8.9-9    
Color Ivory
Thermal Shock Resistance
Coefficient of Thermal Expansion
Thermal Conductivity
Chemical Resistance

*Contact [email protected] if you have any questions

Sample request

Standard Product Specifications

SKU Number
Diameter (mm)
BL005 5
BL007 7
BL010 10

*For other sizes and specifications, please contact 
[email protected]
 for more information

Johncera’s Alumina Grinding Balls

High strength, high hardness, excellent wear resistance, high temperature resistance, high corrosion resistance, not polluting the materials; these are just some of the many outstanding characteristics that Johncera's alumina grinding balls possess.

These properties are also why Johncera's alumina grinding balls being widely used in various manufacturing processes across industries like ceramics, enamel, glass, and chemical plants. Thanks to its grinding efficiency and wear resistance, alumina ceramic balls are commonly used as the preferred grinding medium for ball mills, pot mills, vibration mills and many other grinding equipments. 

Looking for The Best Ceramic Alumina Ball Components?

At JohnCera, we offer our customers the best grinding and wear resistant solutions. Our 99 Alumina ball is no exception with its amazing properties.

High Purity: the alumina content in Johncera’s proprietary alumina ball is higher than the industry standard of 99%, with the content of silica kept to a maximum of 0.2%. Such high purity alumina provides better chemical stability and increased hardness. Our highly inert alumina grinding balls are the perfect choice for any processes that involve high temperatures or reactive acid-base environments.

Enhanced Strength and Durability: our 99 alumina balls come with a Mohs hardness greater than 9 – making it one of the hardness materials out there! And thanks to that, it significantly reduces wear and tear, allowing you to prolong the service life of the grinding medium. Longer service life, lesser costs, and downtime for your production runs.

High Specific Gravity: the specific gravity of Johncera’s ceramic grinding balls is higher than 3.9g/cm– yet another higher than the industry benchmark. This benefit? This increased density helps improve the grinding efficiency significantly, reduces grinding time, saves energy consumption and, as a result, reduces costs. 




Electronic materials 

Magnetic materials

Non-metallic mineral powders: zirconium silicate, kaolin, heavy calcium carbonate, etc.

Paints & Coatings 

Ball mills

Vibration mills 

Planetary ball mills

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