Silicon Nitride ceramic ball enjoys high ceramic strength, good wear resistance, high stiffness, corrosion resistance, high temperature resistance, electrical insulation, Low magnetic conductivity and small proportion and other performance which metal material don't have. Suitable for rolling body of special ceramic bearing. _x000D_ _x000D_ _x000D_ Features: _x000D_ High rigidity, high strength and high hardness. _x000D_ Strong corrosion resistance, can be used in strong acid and strong alkali. _x000D_ High temperature resistant, silicon nitride ceramic balls under 1000environment can be normally used. _x000D_ Low density (3.2g/cm3), about 60% lighter than steel ball, reducing wear and noise. _x000D_ The low linear expansion coefficient (3.2 x 10-6/K), almost 1/4 of bearing steel, can withstand the rapid change of temperature _x000D_ Self-lubricity, can solve the pollution caused by the lubrication medium and inconvenient addition,Can be used in vacuum and high temperature. _x000D_ Drug resistance, high mechanical strength. _x000D_ Application: high temperature bearing, corrosion resistant bearing, chemical pump, ceramic valve ball. _x000D_ _x000D_ Specification: _x000D_ Material: Silicon Nitride _x000D_ Accuracy level: G10 _x000D_ Size range: 9.525/10.318/11.113/11.509mm(Optional) _x000D_ Weight: 25 - 40 g / 0.9-1.4 oz(approx.)_x000D_ _x000D_ Package list: _x000D_ 5 x Bearing Ball