Customizable Alumina Ceramic Bearing with High Electrical Insulation, Ultra-high Wear Resistance, and High-Temperature Resistance

This step-type alumina ceramic bearing is manufactured from high-purity alumina (Al₂O₃) ceramic raw materials through high-temperature sintering and precision internal/external cylindrical grinding. Featuring a stepped cylindrical structure, it offers high inner and outer wall smoothness with excellent coaxiality. With superior wear resistance, high insulation, high-temperature resistance, and low friction, this high-performance industrial ceramic component is designed to replace traditional metal bearings in harsh working conditions including high-speed rotation, strong corrosion environments, and electrical isolation applications.

Widely used in high-speed motors, pump and valve equipment, semiconductor automation equipment, chemical conveying machinery, high-temperature furnace transmission mechanisms, and other demanding scenarios. It serves as wear-resistant bearings, insulating bushings, anti-corrosion liners, and high-temperature-resistant supports, effectively addressing common metal bearing issues such as wear, corrosion, and electrical short circuits while significantly improving equipment service life and operational stability.

• Ultra-high Wear Resistance & Low Friction: Mohs hardness of 9, high surface smoothness, low friction coefficient, and wear rate far lower than metal bearings, with service life increased by 5-10 times
• High Insulation & Anti-Interference: Excellent electrical insulation performance with high breakdown voltage, effectively isolating current and preventing equipment leakage and electrostatic interference
• High-Temperature & Corrosion Resistance: Withstands long-term temperatures up to 1600℃ and resists acid, alkali, and salt corrosion, suitable for harsh conditions including high-temperature furnaces and chemical medium transportation
• High Precision & Low Tolerance: Inner and outer diameter and step dimensional tolerances controlled within ±0.01mm, with excellent coaxiality to meet high-speed and high-precision transmission requirements

Raw Material Proportioning → Spray Granulation → Isostatic Pressing → High-Temperature Sintering (1650-1800℃) → Precision Internal/External Cylindrical Grinding → Step Machining → Mirror Polishing → Cleaning & Inspection → Finished Product Packaging. All processes utilize CNC equipment to ensure bearing coaxiality, roundness, and dimensional consistency.

• Clean the inner and outer walls of the bearing before installation to remove impurities and burrs, avoiding scratches on the contact surface that may affect operation accuracy
• Use thermal fitting or special tooling for press fitting during assembly. Do not strike to prevent brittle cracking of the ceramic
• Avoid eccentric loads and impact loads during operation to prevent damage caused by excessive local stress
• Select a suitable lubricating medium according to working conditions. Can be used directly in some oil-free working conditions

• Customization of inner/outer diameter, step size, and alumina content available, with free sampling and technical adaptation services provided
• All products undergo full inspection before delivery, with inspection reports provided. Non-human-induced quality issues eligible for return or exchange
• Working condition analysis and selection recommendations provided to assist customers in optimizing equipment transmission solutions