Cylindrical Alumina Grinding Media  | Zirconia | High Density Alumina   
 Specialty/Dispersion  |Dispersion Bead Media 

Cylindrical Alumina Grinding Media

High-density, ultra-high fired Burundum is the ideal medium for wet or dry milling. High specific gravity and cylindrical shape give it greater weight per volume, more contacts per mill revolution, greater area of attrition, with each contact. Result: faster, finer grinding or dispersion, often cutting milling time in half. 

Features: 

• Long wearing, non-contaminating grinding

• Tough, hard, non-porous surface is chip resistant, easily cleaned and unaffected by most acids or alkalis

• Non-conductive, non-magnetic, with excellent resistance to mechanical and thermal shock

• Available in 90%, 96% and 99% compositions
  

Specifications:

1/4" O.D. x 1/4" long  ........... 650 pcs/lb (for fine grinding)
1/2" O.D. x 1/2" long  ............94 pcs/lb  (for rapid dispersion of liquid based systems)
13/16" O.D. x 13/16" long .......18 pcs/lb (for dry grinding & general lab use)
1-1/4" O.D. x 1-1/4" long ........4pcs/lb (for grinding & crushing large particle size)

(Piece count is approximate)

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Zirconia Grinding Media

Magnesia Stabilized Zirconia grinding media mills twice as fast as equivalently-sized alumina media with only 1/2 the media weight loss and only 1/3 the wear (weight loss) of the grinding jar, with accompanying reduced batch contamination. Available in radius end cylinders, with length equal to their outside diameters.

Features: 

• 1.6 times denser than high alumina

• Hard, non-porous surface, chip resistant, easily cleaned.

• Non-conductive, non-magnetic, excellent resistance to mechanical and thermal shock

• Spheres and beads also available

Specifications:

1/4" Radius end cylinder.................. 485 PCs/lb
3/8" Radius end cylinder.................. 150 PCs/lb
1/2" Radius end cylinder.................... 65 PCs/lb
3/4" Radius end cylinder ....................50 pcs/lb
(Piece count is approximate)

NOTE: With a specific gravity of 3.42, the charging factor of Burundum (pounds of media to be used per gallon of total jar capacity to give a 50% vol. Media charge) is approximately 9 lbs/gallon.

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High-Density Alumina Spheres

These hard, impervious spheres, which are heavier than porcelain, mill faster with negligible silica contamination. Wear and chip resistant. Easy to clean.

Features: 

• Hard, tough, non-porous, chip-resistant surface

• Unaffected by most acids or alkalies

• Non-conductive, non-magnetic, resistant to mechanical and thermal shock

• Beads also available

• Available in 87%, 96% and 99% compositions

• 87% alum-oxide, 13% 5102-silica

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Specialty /Dispersion

U.S. Stoneware has assembled the most extensive collection of specialty ceramic grinding medias anywhere. The following chart identifies some of the more frequently requested materials.

c/o- contact office

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Dispersion Bead Media

c/o- contact office
*Charging Factor = pounds of media per gallon of jar capacity to give 50% volume charge.
**Sizes vary from 1-20 micron up to 16mm.
Stainless steel media is also available. Call for available sizes.

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