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5/28/2010  Miniature Sapphire & Ruby Balls for Check Valves, Bearings and Stylus Tips 
 
Miniature precision sapphire and ruby balls for use in medical and chemical pumps as check- and metering valves, as ball- and roller bearings and endoscope lenses are available from Meller Optics, Inc. of Providence, RI.

Meller Sapphire and Ruby Balls are second only to diamond in hardness to provide superior wear resistance, have a 2,000C melting point, and are impervious to most chemicals, solvents, and detergents. Ideally suited for applications in medical devices and instruments, these miniature precision balls are offered in 42 sizes, inch and metric from 0.1mm to 0.5 dia.

Featuring Moh 9 hardness (Knoop 1800 perpendicular to the C-axis and 2200 parallel to the C), Meller Sapphire and Ruby Balls have surface finishes of 20-10 scratch-dig or better and can be precision ground into plano-convex lenses and drilled for use as bearing rollers.

Meller Sapphire and Ruby Balls are priced according to material, size, and quantity; delivered from stock. Samples, literature, and price quotations are available upon request.
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