» Bearings for high speed operations - SKF
1994-9-15 · Bearings with only the rolling elements made of ceramics are mainly used for high speed applications. Typical properties of silicon nitride are: low density, 40 % of that of steel. small thermal expansion, 29 % of that of steel. high modulus of elasticity, 151 % of that of steel. great hardness, HV10 at 20 °C is 1,700 compared with 700 for ...
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