Bal-tec - Silicon Nitride Balls
Silicon Nitride, Si3 N4, ceramic has become the standard ceramic ball material for hybrid Ball Bearings. This material is very hard, over 2000 Knoop, and very wear resistant. The weight of silicon nitride balls in only 40% of steel at 3.2 grams per CM^3. This material is hot isostatic pressed from 1
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