High Precision C799 99% 99.5% Alumina Ceramic Shaft Bushing Sleeve
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Product Highlights
- Superior Wear Resistance: Offers much longer service life than stainless steel with low friction coefficient.
- High Hardness Surface: Over 9 on Mohs scale with satin-smooth finish, second only to diamond.
- Corrosion and Rust Proof: Resists almost all strong acids and alkalis; never oxidizes or rusts.
- Lightweight Advantage: Significantly lighter than both stainless steel and zirconia alternatives.
- High Precision Tolerance: OD and ID tolerance as tight as 0.001mm with length tolerance of 0.001mm.
- Multiple Alumina Options: Available in 99%, 99.5%, and 99.8% alumina purity levels.
- Advanced Shaping Methods: Supports dry pressing, injection molding, hot pressing, and ISO pressing.
- Customization Support: Custom-made demands supported for materials, dimensions, and designs.
Product Attributes
- Customization
- Available
- Application
- Electronics, Medical, Refractory, Structure Ceramic, Industrial Ceramic
- Type
- Ceramic Parts
- Certification
- ISO9001:2008, RoHS
- Feature
- Vacuum, Corrosion Resistant
- Style
- Without Outer Ring
- Rows Number
- Multiple
- Shaping Methods
- Dry Pressed, ISO Pressed, Hot Pressed
- Density
- Over 5.95g/cm3
- Surface Treatment
- Diamond-Like Polishing
- Secondary Process
- CNC Machining, Fine Grinding
- Tolerance
- Od and ID Best to Be 0.005mm
- Certificate
- RoHS, Reach, ISO9001:2008
- Usage
- Ceramic Holder, Structure Ceramic Parts
- Transport Package
- Individual Packaging
- Specification
- Max. OD to be 800mm
- Trademark
- JingHui
- Origin
- China
- HS Code
- 8547100000
- Production Capacity
- 5000000PCS/Month
- Package Size
- 36.00cm * 20.00cm * 24.00cm
- Package Gross Weight
- 8.000kg
Shipping
- Shipping Cost:
- Contact the supplier about freight and estimated delivery time.
Online Trading Protection
- Payment Guarantee
-
Platform-protected payments with refund support for eligible order issues.
- Platform Logistics
- Clearer shipment tracking with platform-supported logistics.
- Inspection Service
- Optional pre-shipment inspection for quality and quantity checks.
- After-Sales & Dispute Handling
- Platform-assisted dispute resolution, including refunds or returns when applicable.
Only orders placed and paid through Made-in-China.com Secured Trading are eligible for payment protection and the corresponding platform services.
Product Images of High Precision C799 99% 99.5% Alumina Ceramic Shaft Bushing Sleeve
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Product Description

The main features of the alumina ceramic shafts
2. High hardness: over 9 on Mohs scale, diamond being 10, with a satin-smooth surface finish
3. Good chemical and corrosion resistance, it won't react with almost all strong acides and alkalis except for HF.
4. It won't oxided and rust forever in any harsh conditions and enviroments.
5. It offers ligh-weight advantage than both stainless steel and zirconia ones.
The specification of ceramic parts
| Material option | 99%, 99.5% and 99.8% alumina optional |
| Forming methods | Dry pressed, Ceramic injection molding, Hot pressed, ISO pressed |
| Specification | OD can be from 1 to 50mm, length can be from 10mm to 800mm |
| Precision processing | CNC machining, Precision grinding, Polishing, Lapping, |
| Tolerance | The tolerance of OD and ID can be 0.001mm, the tolerance of length can be 0.001mm |
| Key parameters | Roughness to be 0.02mm, Parallelism to be 0.001mm |
| Surface quality | Free of cracks, foreign contamination, mirror surface better than Ra0.1 |
The gallery of technical ceramic parts
| Property | Units | Material |
||||
| 99.5% alumina |
99% alumina |
95% alumina |
ZrO2 (Y-TZP) |
ZrO2 |
||
| Density | g/cm3 | ≥3.85 | ≥3.80 | ≥3.60 | ≥5.95 | ≥5.72 |
| Water absorption | % | 0 | 0 | 0 | 0 | 0 |
| Hardness | HV | 1700 | 1700 | 1500 | 1300 | 900 |
| Flexural strength | Mpa | ≥379 | ≥338 | ≥320 | ≥1200 | ≥1200 |
| Compressive strength | Mpa | ≥2240 | ≥2240 | ≥2000 | ≥1990 | 1750 |
| Fracture toughness | Mpa m1/2 | 4-5 | 4-5 | 3-4 | 6.5-8 | 11 |
| Max. service temperature |
ºC | 1675 | 1600 | 1450 | 1000 | |
| CTE | 1×10 -6 /ºC | 6.5~8.0 | 6.2~8.0 | 5.0~8.0 | 8.0~9.5 | 10.2 |
| Thermal shock | T(ºC) | ≥250 | ≥200 | ≥220 | ≥300 | 350 |
| Thermal conductivity(25ºC) | W/m.k | 30 | 29 | 24 | 3 | 3 |
| Volume resistivity | ohm.cm | |||||
| 25ºC | >1 x 10 14 | >1 x 10 14 | >1 x 10 14 | >1 x 10 11 | >1 x 10 11 | |
| 300ºC | 1 x 10 12 | 8 x 10 11 | 10 12 -10 13 | 1 x 10 10 | 1 x 10 10 | |
| 500ºC | 5 x 10 10 | 2 x 10 9 | 1 x 10 9 | 1 x 10 6 | 1 x 10 6 | |
| Insulation strength | KV/mm | 19 | 18 | 18 | 17 | 20 |
| Dielectric constant(1Mhz) | (E) | 9.7 | 9.5 | 9.5 | 29 | 28 |
1. Various selections of shaping equipment, mainly including dry pressing, ceramic injection molding (CIM), hot pressing, and Cold isosatic pressing
2. In-housing CNC machining, and precision dimensional checking


Q1. Are you a factory or trading company?
A: We are a manufacturer with over 16 years of experience. You are welcome to visit our factory.
Q2: Do you send a sample to check?
A: Sure, the sample is free and freight is collected.
Q3: When will you ship it?
A: If the products are in storage, we'll ship within 48 hours
Q4: When can I get the price?
A: We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price.
Please call or tell us in your email so we can proceed with your inquiry as a priority.
Q5: Is it available to provide customized products?
A: We always support custom-made demands as per different materials, dimensions, and designs.
About the Supplier
Company Profile
Established in 2008, JingHui Industry Ltd is a professional manufacturer and exporter that integrates the design, development, and production of various ceramic components in zirconia, alumina, silicon nitride, and aluminum nitride.
Our Facility is located in Loudi City, Hunan Province, and the export division is set up in Shenzhen city, with convenient transportation access. All of our products comply with international quality standards, such as ISO9001: 2015, RoHS, REACH, and FDA, and are greatly appreciated in various markets throughout the world.
We have over ten production lines covering raw material preparation, shaping, sintering, post-processing, metalizing and plating, and so on. The export business accounts for around 70% of our annual turnover. Our well-equipped facilities and excellent quality control system throughout all stages of production enable us to guarantee total customer satisfaction. Our high-quality products and outstanding customer service have helped us to build a global sales network in over 60 countries.
Our company offers a variety of technical ceramic products which can meet your multifarious demands. We have adhered to the management principles of "Quality First, Customer Orientation, and Credit-based" since the company's establishment and always do our best to satisfy every potential need of our customers. Our company is sincerely willing to cooperate with esteemed enterprises worldwide to realize a win-win situation since the trend of economic globalization has developed with irresistible force.
About Our Factory & Business Background
- Address
- 1st Bldg, No. 6352, Pingshan Ave., Shatian Community, Kengzi, Pingshan, Shenzhen, Guangdong, China
- Terms of Payment
- LC, T/T, PayPal, Western Union, Small-amount payment, Money Gram, RMB
- International Commercial Terms(Incoterms)
- FOB, CFR, CIF, DAT, FAS, DDP, DAP, CIP, CPT, FCA, EXW
- Average Lead Time
-
Peak Season Lead Time: 1-3 months
Off Season Lead Time: within 15 workdays - Nearest Port
- Shenzhen, HongKong, Shanghai
Our Production Capability & Technical Expertise
Our Industry Experience & Global Business Record
- Export Year
- 2009-03-11
- Main Markets
- North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
FAQ
- Are you a factory or trading company?
- We are a manufacturer with over 16 years of experience. You are welcome to visit our factory.
- Do you send a sample to check?
- Sure, the sample is free and freight is collected.
- When will you ship it?
- If the products are in storage, we'll ship within 48 hours.
- When can I get the price?
- We regularly quote within 24 hours after we get your inquiry. If you are in urgent need of getting the price. Please call or tell us in your email so we can proceed with your inquiry as a priority.
- Is it available to provide customized products?
- We always support custom-made demands as per different materials, dimensions, and designs.
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