99.5% Alumina Ceramic Insulated Bearings Offering Exceptional Insulation And Precision Retention
99.5% Alumina Ceramic Insulated Bearings Offering Exceptional Insulation And Precision Retention
Product Introduction
Alumina ceramic insulated bearings are manufactured using 99.5% high-purity alumina ceramic material, offering exceptional electrical insulation properties and mechanical strength. By integrating alumina ceramic layers on the bearing rings' surfaces, these bearings provide complete electrical insulation, effectively preventing electrical corrosion - making them ideal for applications with electrical current risks.
Primary Applications
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Electric Motors: Variable frequency motors, generator insulated bearings
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Rail Transit: High-speed train traction motors
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Wind Power: Wind turbine generator insulated bearings
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Medical Equipment: MRI and medical imaging systems
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Special Environments: Strong electromagnetic fields, highly corrosive conditions
Key Advantages
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Superior Insulation: >1000MΩ resistance, >3000V withstand voltage
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Excellent Corrosion Resistance: Withstands acids, alkalis and organic solvents
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Extended Service Life: 3-5 times longer lifespan by preventing electrical erosion
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Maintenance-Free Design: Eliminates additional insulation requirements
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Precision Retention: Stable ceramic coating maintains bearing accuracy
Technical Specifications
| Parameter | Specification |
|---|---|
| Ceramic Material | 99.5% Al₂O₃ |
| Insulation Resistance | ≥1000MΩ(500VDC) |
| Withstand Voltage | ≥3000V(AC) |
| Precision Grade | ABEC-3/ABEC-5 options |
| Temperature Range | -40℃ to +300℃ |
| Size Range | 10-200mm bore diameter |
| Ceramic Thickness | 0.3-1.0mm customizable |
Manufacturing Process
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Base Processing: Precision steel bearing base
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Surface Treatment: Base surface roughening
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Ceramic Coating: Plasma-sprayed alumina layer
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Precision Grinding: Ceramic surface finishing
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Assembly & Testing: Bearing assembly and insulation verification
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Packaging: Moisture/shock-proof packaging
Usage Guidelines
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Avoid impact on ceramic surfaces during installation
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Maintain operating humidity <80%RH
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Regularly monitor insulation resistance
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Use ceramic-compatible lubricants
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Use specialized tools during disassembly
Service Commitment
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Dedicated technical support team
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48-hour response time
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Complimentary selection consultation
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Customization services available
FAQ
Q: Will the ceramic insulation layer detach?
A: Special process ensures >50MPa bond strength - won't detach under normal use
Q: Advantages vs traditional insulated bearings?
A: More stable insulation, significantly longer service life
Q: Maximum available size?
A: Currently up to 200mm bore, larger sizes customizable
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.