Ceramic Bearings
Timken engineers have developed hundreds of ceramic designs. Timken continues to focus on solutions that incorporate the silicon nitride (Si3N4)family of ceramic compounds, known for their low density, hardness, elasticity, tensile strength, and other benefits.
Silicon nitride’s density is 40 percent of traditional bearing steels. Because force is directly proportional to mass, the lower-density silicon nitride significantly reduces the centrifugal forces of the balls on the outer ring. This enhances operations in high-speed applications where outer race contact loads may hinder performance.
Bearing life is directly related to hardness, the most critical mechanical property of bearing material. With an impressive Rockwell C 78 hardness - twice as hard as many steel bearings - silicon nitride improves wear resistance, minimizing the damaging effects of repetitive surface contacts.
Silicon nitride’s density is 40 percent of traditional bearing steels. Because force is directly proportional to mass, the lower-density silicon nitride significantly reduces the centrifugal forces of the balls on the outer ring. This enhances operations in high-speed applications where outer race contact loads may hinder performance.
Bearing life is directly related to hardness, the most critical mechanical property of bearing material. With an impressive Rockwell C 78 hardness - twice as hard as many steel bearings - silicon nitride improves wear resistance, minimizing the damaging effects of repetitive surface contacts.
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