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Help CenterPure Copper Bush for Hydraulic Cylinder Applications Low Friction and Wear Resistance at 200°C
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As a trusted manufacturer with over 25 years of experience in metal components, Anping County Boli Hardware Wiremesh Products Factory (established 1998) proudly presents our Pure Copper Bush for Hydraulic Cylinder Applications. Designed to deliver low friction and exceptional wear resistance even at continuous operating temperatures of 200°C, this bushing is a reliable solution for demanding hydraulic systems. Our factory, located in Hengshui, Hebei, China, has exported over US$5 million annually to global markets including North America, Europe, and Southeast Asia, ensuring consistent quality and competitive pricing.
This pure copper bushing is precision-engineered for hydraulic cylinder guide rings, wear rings, and pivot bushings where smooth motion and durability are critical. The inherent self-lubricating properties of copper reduce the need for external lubrication, while the material’s thermal conductivity helps dissipate heat effectively, preventing premature failure at elevated temperatures. Below we detail the key features, technical specifications, and benefits that make this product stand out.
Key Features & Technical Specifications
- Material: 99.9% pure copper (C1100 or C1020), free from alloying elements that could cause galvanic corrosion in hydraulic systems.
- Low Friction Coefficient: Typically ≤0.15 against hardened steel, reducing energy loss and heat generation.
- Temperature Resistance: Reliable performance up to 200°C (392°F) without softening or creep, ideal for high-temperature hydraulic circuits.
- High Wear Resistance: Copper’s natural work-hardening property increases surface hardness under load, extending service life.
- Corrosion Resistance: Excellent resistance to hydraulic fluids, oils, and water-glycol mixtures.
- Customizable Dimensions: Available in various inner diameters, outer diameters, and lengths to fit standard and custom cylinder bores.
- Surface Finish Options: As-rolled (smooth) or machined to precise tolerances (e.g., H7/f7 fit).
- Non-Magnetic: Pure copper is non-magnetic, suitable for applications near sensors or magnetic components.
- Environmentally Friendly: 100% recyclable material, supporting sustainable manufacturing practices.
| Parameter | Value | Notes |
|---|---|---|
| Material Purity | ≥99.9% Cu | C1100 / C1020 grade |
| Hardness (as-supplied) | HB 35–55 | Work-hardens to HB 70+ in use |
| Tensile Strength | ≥200 MPa | Suitable for moderate loads |
| Max Operating Temperature | 200°C (continuous) | Peak up to 250°C short-term |
| Friction Coefficient (vs steel) | 0.10–0.15 (dry) | Lower with lubrication |
| Thermal Conductivity | ~390 W/m·K | Excellent heat dissipation |
| Dimensional Tolerance | ±0.05 mm (standard) | Tighter available on request |
Detailed Product Benefits
The low friction nature of pure copper reduces the startup torque and stick-slip phenomenon in hydraulic cylinders, leading to smoother operation and longer seal life. With wear resistance that outperforms many bronze alloys in high-temperature environments, this bushing minimizes downtime and maintenance costs. The copper’s thermal conductivity (nearly 5 times that of steel) helps dissipate frictional heat, preventing localized hot spots that can cause fluid degradation or seal failure. Additionally, the material’s compatibility with hydraulic oils ensures no swelling or chemical attack, maintaining stable dimensions over time.
For cylinder manufacturers, using our pure copper bushings can reduce the need for separate lubrication systems in some cases, simplifying design and lowering overall system cost. The bushings are also easy to machine for custom modifications, and our factory can supply them in a semi-finished state for final sizing by the customer. Each bushing undergoes strict dimensional inspection before packaging to ensure a consistent fit.
Trust & Reliability from a Proven Manufacturer
Anping County Boli Hardware Wiremesh Products Factory has been manufacturing metal components since 1998 with an annual export value of US$5–10 million. Our products are shipped through major ports including Tianjin, Qingdao, Shanghai, and Foshan, serving customers in North America, Europe, Southeast Asia, Africa, and Oceania. We maintain strict quality control procedures and can provide material certificates upon request. Our team of experienced engineers is available to assist with custom designs, ensuring the bushing perfectly matches your hydraulic cylinder specifications.
We understand that reliability is critical in hydraulic applications. Our pure copper bushings have been tested in real-world conditions, demonstrating consistent performance at 200°C with minimal wear over thousands of cycles. Contact us today for a quotation or to request samples for your qualification testing. We offer competitive pricing, flexible lead times, and dependable after-sales support.
Frequently Asked Questions (FAQ)
-
Q: What is the maximum operating temperature for this bushing?
A: The bushing is designed for continuous operation up to 200°C (392°F). Short-term peak temperatures up to 250°C are acceptable, but prolonged exposure above 200°C may reduce service life. -
Q: Can you supply non-standard dimensions?
A: Yes, we offer full customization. You can specify inner diameter, outer diameter, length, and tolerance requirements. Please provide a drawing or detailed dimensions for a quote. -
Q: Is this bushing suitable for use with water-glycol hydraulic fluids?
A: Yes, pure copper is highly resistant to water-glycol mixtures and common hydraulic oils. However, you should avoid fluids with high ammonia content, which can attack copper. -
Q: Does the bushing require lubrication?
A: The low friction coefficient allows operation without external lubrication in many light-duty applications. For heavy loads or high-speed cycles, we recommend a thin film of grease or oil to further extend life. -
Q: What is the typical lead time for custom orders?
A: For standard sizes, lead time is 7–15 days. Custom orders usually require 15–25 days, depending on complexity and quantity. We can expedite urgent orders upon request. -
Q: Do you provide material certificates?
A: Yes, we can provide a mill test certificate for the copper material verifying purity and mechanical properties. This is available upon request. -
Q: Can this bushing be used in a marine environment?
A: Pure copper has good corrosion resistance in freshwater and seawater, but it is not recommended for direct contact with aggressive seawater in high-velocity flow. For marine hydraulic cylinders, consider a copper-nickel alloy or brass with proper coating. -
Q: How do you package the bushings for export?
A: We pack bushings in sturdy cartons, then wrap with waterproof plastic and secure in plywood cases for sea freight. Each bushing is individually wrapped to prevent surface scratches.
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