Ceramic Grinding and Milling Media
Radius-End Cylinders

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Radius-End Cylinder Ceramic Grinding and Milling Media

Based Upon Magnesia Stabilized Zirconium Oxide

Engineered for grinding and milling of zircon, zirconia, barium titanate, food stuffs, pharmaceuticals and electronic ceramics in vibratory, ball, jar and attritor mills. Zircoa grinding media delivers fast grinding and milling, with low contamination and media weight loss.

Our Strategy — Your Satisfaction

Zircoa’s grinding media has been used successfully, for decades, to grind electronic ceramics, zircon and zirconia. Our on-going engineering and manufacturing refinement allows us to keep pace with this market. This pro-active approach also prepares us for partnering with the newer electronics markets, which demand higher purity and much less contamination.

A Superior Media

Our media is made of magnesia stabilized zirconia. This formulation is non-porous, non-conductive and non-magnetic. It is chemically inert, chip-resistant and extremely hard. Zircoa engineers this formulation into both radius-end cylinder and banded satellite sphere shapes.

Radius-End Cylinders (above) — Developed for use in vibratory, ball and jar mills. Manufactured in various sizes to accommodate your specific requirements. Well-suited for grinding barium titanates and other electronic ceramics, zircon, zirconia and other specialty ceramics. 


Stocked Sizes of Ceramic Grinding and Milling Media

Sizes Approximate Number
of Pieces per
in (mm) lb (kg)
Radius-end cylinders
1.25 x 1.25 (31.8 x 31.8) 3 (7)
1 x 1 (25.4 x 25.4) 7 (15)
0.75 x 0.75 (19.1 x 19.1) 18 (40)
0.5 x 0.5 (12.7 x 12.7) 65 (143)
0.375 x 0.375 (9.53 x 9.53) 150 (333)
0.25 x 0.25 (6.35 x 6.35) 426 (939)

Note: To obtain a 50% media charge, 14 lb. / gal. (1.68kg / l) media are required.
Packing density is approximately 210 lb. / ft.3  (3364kg / m3); 28 lb. / gal. (3.36kg /l).

Physical Properties of Ceramic Grinding and Milling Media

Properties Units Values
ZrO2 wt % 97
MgO wt % 3
SiO2 wt % <0.3
CaO wt % <0.3
Fe2O3 wt % <0.2
Al2O3 wt % <0.2
TiO2 wt% <0.2
Bulk density g/cm3 5.5
Apparent porosity % 0
MOR at room temp  1000 psi
Tensile strength at room temp (.6 MOR)
1000 psi
Fracture toughness (K1C) MPaÖm 7
Weibull Modulus   10
Hardness - Rockwell “A” scale 80-84
             - Vickers HV0.3Kg/mm2 1050