Alumina Ceramic Guide Bushings: Core Guiding Components For Precision Machinery
Alumina Ceramic Guide Bushings: Core Guiding Components for Precision Machinery
Introduction
Alumina ceramic guide bushings are precision mechanical components made from high-purity alumina (Al₂O₃) material, manufactured through advanced isostatic pressing and high-temperature sintering processes. This product features extremely high hardness, excellent wear resistance, and stable chemical properties, maintaining long-term dimensional stability and guiding accuracy under harsh working conditions, making it an indispensable key guiding component in precision mechanical equipment.
Applications
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CNC Machine Tools: Spindle guide bushings, guideway sliders, feed system positioning bushings
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Automation Equipment: Robot guide bushings, conveyor line positioning bearings, precision transmission mechanisms
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Measuring Instruments: CMM guide bushings, optical instrument positioning bearings, precision testing equipment
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Automotive Manufacturing: Engine assembly guide bushings, transmission positioning bearings, automated production lines
Advantages
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Super High Hardness: Vickers hardness ≥1700HV, wear resistance is more than 10 times that of bearing steel
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Extremely Low Friction Coefficient: Friction coefficient only 0.05-0.1, reducing power loss
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Excellent Dimensional Stability: Thermal expansion coefficient 7.2-8.0×10⁻⁶/℃, ensuring accuracy at high temperatures
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Corrosion Resistance: Resists various cutting fluids, lubricants, and chemical media
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Long Service Life: 5-8 times longer service life than metal bushings under same working conditions
Specification Parameters Table
| Performance Indicator | Unit | Parameter Range | Test Standard |
|---|---|---|---|
| Alumina Content | % | 96-99.8 | ISO 14720 |
| Inner Diameter Accuracy | mm | ±0.002 | ISO 286 |
| Outer Diameter Accuracy | mm | ±0.003 | ISO 286 |
| Roundness Error | μm | ≤1.5 | ISO 1101 |
| Surface Roughness | Ra | ≤0.2 | ISO 4287 |
| Thermal Expansion Coefficient | ×10⁻⁶/℃ | 7.2-8.0 | ASTM E228 |
| Operating Temperature | ℃ | -50~1400 |
Manufacturing Process
Raw material selection → Formula optimization → Spray granulation → Isostatic pressing → High-temperature sintering → Precision grinding → Laser measurement → Ultra-precision machining → Quality inspection → Anti-rust packaging
Usage Instructions
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Clean mating surfaces before installation, remove oil stains and impurities
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Use special installation tools, avoid direct impact
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Ensure proper fit clearance when matching with shaft (recommended H6/g6)
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Regularly check wear condition, inspect every 2000 operating hours
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Operating temperature range: -50℃ to 1400℃
After-Sales Service
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18-month quality guarantee period
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24/7 technical support from professional team
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Free selection consultation and installation guidance
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Establish customer usage files, regular maintenance reminders
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36-hour response for emergency orders
FAQ
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Q: What level of dimensional accuracy can the product achieve?
A: Inner diameter accuracy can reach IT4 grade, roundness error ≤1.5μm -
Q: Can it be used without lubrication?
A: Yes, alumina ceramic has self-lubricating properties and can work under oil-free conditions -
Q: What is the maximum allowable operating speed?
A: Maximum operating speed can reach 30000rpm, depending on working conditions
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.