Ceramic Balls

Ceramic balls are particularly suited to harsh environments. Their main advantages over steel is that they have a density of 40% lower than steel. Have 29% lower thermal expansion and are 150% harder. In certain high-speed applications their life is extended by as much as a hundred times. The three main materials used are Alumina Oxide, Zirconium Oxide and Silicon Nitride.

Material Specifications

 

Alumina Oxide

Zirconium Oxide

Silicon Nitride

Composition 99.5% Al2O3 / 0.5% other 97% ZrO2 / 3% MgO 87% Si3N4 / 13% other
Hardness 1700 Hv 80 – 84 Ra 1400 – 1700 Hv
Ultimate Tensile Strength 31,000 psi 60,000 psi
Ultimate Compressive Strength >300,000 psi 285,000 psi >570,000 psi
Modulus of Elasticity 53 x106 psi 29 x106 psi 44-45 x106 psi
Maximum Working Temperature 1400oC 2400oC 1000oC
Corrosion Resistance Inert except for hydruofluric and hot concentrated sulphuric acids. Inert to most substances, not recommended for environments of hydrochloric or strong alkaline solutions. Inert to most substances.

VTLG Asia is the first Asian-based German supplier of products and services to the capital equipment and Industrial component industry. For inquiries and requests please contact us at: paulyang@vtlg-asia.com. VTLG specializes in supplying ball products to the linear guide, ball screw and ball retainer industry.