Rubysapphire - Materials - Technical

Synthetic Ruby and Sapphire

HES Products made from this material

Synthetic ruby and sapphire balls are available from SPB. The material offers extreme hardness, wear resistance, non-corrosiveness and chemical inertness with a specific gravity of 3.98. Ruby and sapphire balls are used in chemical pump check valves, wind indicators, probe and test measurement tips, medical check valves, master ball gauging sets, ball plug gauges, sapphire fiber optic lens systems, tracer tips, gyroscopic wear points and precision metering valve assemblies.

Ruby and sapphire balls can be used for low friction and long wear bearing applications. The melting point is 2,000oC and oxidation of the material isnít a problem.

Sapphire balls offer good optical qualities with a refractive index of 1.76.

the Hobby and Engineering Supplies range of ruby and sapphire balls are mostly produced to Grade 25.

Physical Properties
Compressive Strength MPa 2060
Hardness kgf.mm2 1570 to 1800
Youngs Modulus of Elasticity GPa 344
Density g/cm3 3.98
Coefficient of Thermal Expansion per oC 5.79 x 10-6
Max. use temperature (unloaded) oC 1740
Electrical Resistivity ohm/cm >1014 @ 25oC
Electrical Resistivity ohm/cm 2.5x106 @ 900oC

Various ceramic products can be found in the Hobby and Engineering Supplies Ceramic online catalogue pages.

Silicon Nitride products can be found here in theHobby and Engineering Supplies Silicon Nitride Online Store pages.

For a huge range of bearings online please visit the Bearing Shop Online Website.

The Small Parts and Bearings has a much larger range of engineering supplies.

For the best range of miniature and small bearings please try the Miniature Bearings Australia website. Miniature Bearings Australia also list a large variety of miniature engineering products.

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