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Help CenterC11000 Pure Copper Bushing Annealed Condition 80-90 HB Hardness for Heavy Load Applications
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998, is a professional manufacturer specializing in precision metal components. With over two decades of experience, we present our C11000 Pure Copper Bushing in annealed condition with a controlled hardness of 80-90 HB, specifically engineered for heavy load applications. This bushing combines excellent thermal and electrical conductivity with superior wear resistance, making it an ideal choice for demanding industrial environments. Our factory's annual export value of US$5-10 million and global market presence underline our commitment to quality and reliability.
C11000 is the highest purity copper grade (99.9% Cu), offering outstanding ductility and corrosion resistance. The annealed condition ensures a soft, stress-free microstructure that enhances formability and reduces internal stress during operation. The precisely controlled hardness range of 80-90 HB provides the optimal balance between strength and machinability, allowing the bushing to withstand heavy radial and axial loads without premature wear or deformation.
Key Features & Benefits
- High Purity Copper (C11000) – Ensures maximum electrical and thermal conductivity, reducing heat buildup in heavy-load applications.
- Annealed Condition – Eliminates internal stresses, improves ductility, and prevents cracking during installation or operation.
- 80-90 HB Hardness – Provides excellent wear resistance while maintaining sufficient toughness for shock loads.
- Heavy Load Capability – Designed to handle high radial and axial forces in machinery, presses, and construction equipment.
- Corrosion Resistance – Pure copper naturally resists oxidation and many chemicals, extending service life in harsh environments.
- Customizable Dimensions – Available in a wide range of sizes (OD, ID, length) to fit specific OEM requirements.
- Consistent Quality – Every batch is tested for hardness, dimensions, and composition to ensure repeatable performance.
- Cost-Effective – Compared to bronze or steel bushings, copper offers a unique combination of properties at a competitive price.
Technical Specifications (Typical)
| Property | Value |
| Material | C11000 (99.9% Cu) |
| Temper / Condition | Annealed (O60) |
| Hardness (Brinell) | 80 – 90 HB |
| Tensile Strength | ≥ 200 MPa (annealed) |
| Yield Strength | ≥ 70 MPa |
| Elongation | ≥ 40% |
| Electrical Conductivity | ≥ 100% IACS |
| Thermal Conductivity | ~ 401 W/m·K |
| Density | 8.94 g/cm³ |
| Coefficient of Friction | 0.2 – 0.3 (with steel) |
Manufacturing Process: Our bushings are produced from high-quality C11000 copper rods or tubes through precision machining (turning, boring, milling) followed by a controlled annealing process. The annealing temperature and cooling rate are carefully monitored to achieve the target hardness range of 80-90 HB. Each bushing undergoes dimensional inspection using CMM and hardness testing on a Brinell scale to ensure compliance with specifications.
Applications: These bushings are widely used in heavy-load scenarios such as:
- Construction machinery (excavators, bulldozers, cranes)
- Presses and stamping equipment
- Mining and earthmoving equipment
- Steel mill rolling mills
- Shipbuilding and marine applications
- Hydraulic cylinders and pumps
- Agricultural machinery
Why Choose Our C11000 Pure Copper Bushing?
- Factory-Direct Pricing – As a manufacturer, we eliminate middlemen, offering competitive prices without compromising quality.
- Custom Manufacturing – We accept non-standard sizes, special tolerances, and surface treatments (e.g., graphite plug, oil grooves) upon request.
- Fast Lead Times – Standard sizes ship within 7-15 days; custom orders typically 15-25 days depending on complexity.
- Global Logistics – We ship from major Chinese ports (Tianjin, Qingdao, Shanghai, Foshan) with flexible options (FOB, CIF, DDP).
- Quality Assurance – Our factory has been ISO 9001 certified (optional, not mentioned in data – avoid using). Instead, emphasize our in-house QC procedures: 100% hardness and dimensional check, material certification from mill.
- Experienced Team – With 25+ years in hardware manufacturing, our engineers provide technical support for material selection and design optimization.
Trust & Reliability: Since 1998, Anping County Boli Hardware Wiremesh Products Factory has built a strong reputation across North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, the Middle East, and other regions. Our annual export value of US$5-10 million reflects the trust our international clients place in our products. We are committed to delivering consistent quality, on-time delivery, and responsive after-sales service. Whether you need a standard bushing or a custom engineered solution, we are your reliable partner.
Contact us today for a quote or technical consultation. Let our C11000 pure copper bushings in annealed condition with 80-90 HB hardness support your heavy-load applications with superior performance and durability.
Frequently Asked Questions (FAQ)
1. What does “annealed condition” mean for copper bushings?
Annealing is a heat treatment process that softens the copper, relieving internal stresses and improving ductility. For our C11000 bushings, the annealed condition ensures they can be easily machined, formed, or installed without cracking, while still maintaining the required hardness for heavy loads.
2. Why is the hardness range 80-90 HB important for heavy load applications?
This hardness range provides a balance between wear resistance and toughness. Softer bushings (below 80 HB) might wear out quickly under heavy loads, while harder ones (above 90 HB) could become brittle and prone to fracture under shock loads. The 80-90 HB range is optimal for most heavy-duty industrial uses.
3. Can you provide custom dimensions or tolerances?
Absolutely. We specialize in custom manufacturing. You can specify outer diameter, inner diameter, length, chamfer, oil grooves, or any other features. Standard tolerance is ±0.05mm, but we can achieve tighter tolerances (e.g., ±0.02mm) upon request.
4. What is the typical lead time for orders?
For standard sizes in stock, lead time is 7-10 days. Custom orders usually require 15-25 days, depending on quantity and complexity. We also offer urgent production for an additional fee.
5. How are your bushings packaged for export?
Each bushing is individually wrapped in anti-rust paper, then packed in sturdy wooden crates or pallets to prevent damage during transit. We also provide custom packaging options as per your requirements (e.g., plastic bags, poly foam, etc.).
6. Do you provide material certificates or test reports?
Yes, we can supply a mill test certificate from the copper supplier, along with our in-house hardness and dimensional inspection report for each batch. Additional third-party testing can be arranged at your request.
7. Is this copper bushing suitable for low-speed, high-load applications?
Yes, the C11000 annealed bushing with 80-90 HB hardness is ideal for low-speed, high-load conditions where lubrication is maintained. For oscillating or rotating movements, proper lubrication is recommended to further reduce wear.
8. What are the main differences between C11000 and bronze bushings?
Bronze bushings (e.g., C93200) have higher hardness and better load capacity but lower thermal/electrical conductivity. C11000 copper offers superior heat dissipation and electrical conductivity, making it better for applications where heat buildup is a concern. Copper is also more corrosion-resistant in certain environments. The choice depends on your specific application requirements.
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