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Glass (sp.gr. 2.2 to 3.0)
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 The first of the "engineered" class of grinding media, glass
beads (small balls) and balls were developed specifically for
grinding applications where sand wasn't available. Glass is
manufactured in various grades (Lead-free Soda Lime,
borosilicate, low alkali, black glass, and others) in sizes from 1
micron to 2 inches.
Good wear properties coupled with reasonable roundness means
this is the best material to start with when conducting grinding
trials. Low cost.
Glass balls are also available in precision grades and are used in
optical resolution systems and as "spacers" for precision
electronics. Colored glass balls are used for both engineering and decorative applications.
Click here for up-to-date grinding media price list. Last revision March 2008. (PDF - 288kb)
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