Dayoo Advanced Ceramic Co.,Ltd
Dayoo Advanced Ceramic Co.,Ltd
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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
CNC Machine Tools: Spindle guide bushings, guideway sliders, feed system positioning bushings
Automation Equipment: Robot guide bushings, conveyor line positioning bearings, precision transmission mechanisms
Measuring Instruments: CMM guide bushings, optical instrument positioning bearings, precision testing equipment
Automotive Manufacturing: Engine assembly guide bushings, transmission positioning bearings, automated production lines
Advantages
Super High Hardness: Vickers hardness ≥1700HV, wear resistance is more than 10 times that of bearing steel
Extremely Low Friction Coefficient: Friction coefficient only 0.05-0.1, reducing power loss
Excellent Dimensional Stability: Thermal expansion coefficient 7.2-8.0×10⁻⁶/℃, ensuring accuracy at high temperatures
Corrosion Resistance: Resists various cutting fluids, lubricants, and chemical media
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
Clean mating surfaces before installation, remove oil stains and impurities
Use special installation tools, avoid direct impact
Ensure proper fit clearance when matching with shaft (recommended H6/g6)
Regularly check wear condition, inspect every 2000 operating hours
Operating temperature range: -50℃ to 1400℃
After-Sales Service
18-month quality guarantee period
24/7 technical support from professional team
Free selection consultation and installation guidance
Establish customer usage files, regular maintenance reminders
36-hour response for emergency orders
FAQ
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
