Material Characteristics:
Silicon nitride ceramic is a structural ceramic produced from high-purity silicon nitride powder through gas pressure sintering. It features low density, high hardness, high strength, and excellent thermal shock resistance, along with wear resistance, self-lubrication, corrosion resistance, high-temperature electrical insulation, and non-magnetic properties. It performs stably under harsh conditions such as rapid cooling and heating, high speeds, and strong corrosion, making it an ideal key ceramic material for extreme working environments.
Product Information:
Silicon nitride ceramic bearing rings are high-precision rings made from highly homogeneous green bodies formed by isostatic pressing or injection molding, densified through high-temperature gas pressure sintering, and then processed by precision grinding and superfinishing. These bearing rings fully leverage the combined advantages of silicon nitride material—lightweight, high strength, wear resistance, self-lubrication, corrosion resistance, and electrical insulation—to achieve low vibration, long service life, and maintenance-free operation in high-speed, high-precision, and special media environments, exhibiting outstanding characteristics of no rust, no spalling, no seizure, and no electrical erosion.
Performance Parameters:
Bulk density ≥ 3.2 g/cm³, Vickers hardness ≥ 1500 HV, flexural strength at room temperature ≥ 700 MPa, fracture toughness ≥ 6 MPa·m¹/², elastic modulus ≥ 300 GPa, maximum operating temperature up to 1000 °C.
Product Dimensions:
Silicon nitride bearing rings cover structural types such as deep groove ball bearing rings, angular contact ball bearing rings, cylindrical roller bearing rings, tapered roller bearing rings, and self-aligning ball bearing rings. Inner and outer diameter dimensions range from miniature to medium-large sizes, with accuracy grades reaching P4 or higher. Both inner rings and outer rings can be supplied. Yuko Corporation can also customize non-standard sizes, thin-wall types, ultra-high-temperature-resistant types, and matched ring sets according to customer drawings or working conditions.
Product Applications:
Silicon nitride ceramic bearing rings are key components for manufacturing full ceramic bearings and hybrid ceramic bearings. They are widely used in acid-resistant pump bearings for semiconductor wet process equipment, high-speed motorized spindle bearings for precision machine tools, conveyor roller bearings for LCD panel manufacturing equipment, attitude control flywheel bearings for aerospace, bearings for molecular pumps and turbo compressors, motor and generator bearings for new energy vehicles, bearings for photovoltaic silicon wafer processing equipment, cleanroom conveyor bearings for food and pharmaceutical machinery, and seawater-corrosion-resistant rotating equipment such as marine engineering and nuclear power circulating pumps. They are the preferred solution for bearing rings in extreme conditions such as high temperatures, high vacuum, strong corrosion, and strong radiation.