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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.
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.
Core Advantages
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
Specification Parameters
Item
Parameter
Material
95%/99% Alumina Ceramic
Density
≥3.85g/cm³
Vickers Hardness
≥1500HV
Operating Temperature
Continuous ≤1600℃
Dielectric Strength
≥15kV/mm
Dimensional Tolerance
±0.01mm
Surface Roughness
Ra≤0.4μm
Process Flow
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.
Instructions for Use
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
After-Sales Service
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
Frequently Asked Questions
Q: What is the biggest advantage of ceramic bearings compared to metal bearings?
A: Ceramic bearings are more wear-resistant, corrosion-resistant, and have better insulation. Their service life far exceeds that of metal bearings under oil-free lubrication conditions. They are also rust-free and non-conductive, suitable for more special working conditions.
Q: Can non-standard size ceramic bearings be customized?
A: Customization according to drawings or samples is available, with adjustable parameters such as inner/outer diameter, step structure, and length to meet the assembly requirements of different equipment.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter
Total Annual:
>1000000
Employee Number:
>100
Ecer Certification：
Verified Supplier
We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.
Deyu Precision Ceramics Technology Co., Ltd. has many years of e... We are a company with many years of experience in the production of special precision ceramics and the ability to design, manufacture, process and sell structural and functional parts of various special precision ceramics.
Deyu Precision Ceramics Technology Co., Ltd. has many years of e...
