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Help CenterSintered Bronze Bushing With Oil Impregnation, ASTM B438 Standard, Porosity 18-24%, 100% Inspection
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As a professional manufacturer with over 25 years of experience in powder metallurgy, Anping County Boli Hardware Wiremesh Products Factory is proud to present our Sintered Bronze Bushing with Oil Impregnation, strictly manufactured to ASTM B438 standard. These bushings are engineered with a controlled porosity of 18-24%, allowing them to hold lubricating oil and release it gradually during operation, providing reliable self-lubrication and extended service life. Each bushing undergoes 100% inspection to ensure dimensional accuracy, porosity consistency, and structural integrity, making them a trusted choice for demanding applications across global markets.
Our oil-impregnated bronze bushings are ideal for applications where maintenance access is limited or contamination is a concern. The interconnected pores act as oil reservoirs, reducing friction and wear without the need for external lubrication systems. This design not only lowers operating costs but also improves equipment reliability. With our factory established in 1998 and annual export value exceeding US$5 million, we have supplied these bushings to customers in North America, Europe, Southeast Asia, and other regions, consistently meeting high quality standards.
Key Features & Technical Specifications
- Material Composition: High-quality sintered bronze powder (CuSn10 or CuSn20) ensuring excellent wear resistance and load capacity.
- Porosity Range: 18-24% (measured by Archimedes method) – optimal for oil retention and controlled release.
- Oil Impregnation: Vacuum-impregnated with premium lubricating oil (ISO VG 32-68 available) to ensure uniform oil distribution.
- Dimensional Tolerance: Inner diameter +/-0.025mm, outer diameter +/-0.05mm, length +/-0.1mm (customizable).
- Hardness: Typically 40-60 HB (Brinell) depending on density and composition.
- Compressive Strength: ≥150 MPa (per ASTM B438 requirements).
- Operating Temperature: -20°C to +150°C (continuous), with oil type dependent.
- Surface Finish: As-sintered or machined on request (Ra ≤ 1.6μm).
| Parameter | Value | Notes |
|---|---|---|
| Porosity | 18-24% | Controlled by sintering process |
| Oil Content (by volume) | ≥15% | After impregnation |
| Holding Force (Radial) | ≥ 20 MPa | Per ASTM B438 |
| Max Sliding Speed | 0.5 m/s (dry), 2.0 m/s (lubricated) | Depends on application |
| Available Sizes | OD: 5mm – 200mm, ID: 3mm – 150mm, L: 5mm – 300mm | Custom sizes available |
Advantages & Customer Benefits
- Self-Lubricating Design: Eliminates the need for external oil supply, reducing maintenance and downtime.
- Long Service Life: The oil-impregnated structure provides continuous lubrication, extending bushing life by up to 3x compared to standard bronze bushings.
- Cost-Effective: Lower total cost of ownership due to reduced maintenance, fewer replacements, and improved energy efficiency.
- Versatile Compatibility: Suitable for use with steel shafts, stainless steel, or other materials without galling.
- Low Friction Coefficient: Typically 0.05-0.15 (lubricated), enhancing operational smoothness.
- 100% Quality Assurance: Every bushing is individually inspected for dimensions, porosity, and oil content, ensuring consistent performance.
- Customizable Options: We offer various oil types, lead-free bronze alloys, and special dimensions to meet specific requirements.
Our sintered bronze bushings are widely used in applications such as automotive steering systems, agricultural machinery, textile equipment, electric motors, pumps, and hydraulic cylinders. The controlled porosity ensures that oil is released only when needed, preventing excess leakage and maintaining a clean environment.
Trust & Reliability – Why Choose Us?
Anping County Boli Hardware Wiremesh Products Factory has been a trusted manufacturer since 1998, exporting to over 20 countries worldwide. With an annual export value of US$5 million – US$10 million, we have built a reputation for delivering high-quality powder metallurgy products on time. Our factory is located in Hengshui, Hebei, and we ship from major ports including Tianjin, Qingdao, and Shanghai. We invest in advanced sintering furnaces, precision machining tools, and full inspection equipment to ensure every bushing meets the ASTM B438 standard. Our team of 50+ experienced workers and engineers is dedicated to continuous improvement and customer satisfaction.
We offer competitive pricing, fast lead times (typically 15-25 days for standard sizes), and flexible packaging (carton, wooden case, or pallet). For custom orders, we provide free technical consultation and sample approval before mass production. Whether you need a small batch for prototyping or large volumes for OEM supply, we are your reliable partner.
Contact us today to request a quote or discuss your specific bushing requirements. Let our experience work for you!
Frequently Asked Questions (FAQ)
-
Q: What is the typical oil content after impregnation?
A: Our sintered bronze bushings have an oil content of at least 15% by volume, depending on the porosity level. The oil is impregnated under vacuum to ensure uniform distribution. -
Q: Can I use these bushings in high-temperature environments?
A: The standard operating temperature range is -20°C to +150°C (continuous). For higher temperatures, we can use special oil or lead-free bronze alloys. Please consult our technical team. -
Q: Do you provide custom sizes?
A: Yes, we offer fully customizable dimensions. You can provide your desired OD, ID, length, and tolerance. We can also machine the bushing after sintering for tighter tolerances. -
Q: Are these bushings RoHS compliant?
A: Yes, our standard bronze material is RoHS compliant (lead-free). If you require a specific alloy (e.g., CuSn10 without lead), we can accommodate. -
Q: How long does it take to ship?
A: For standard sizes, production takes 15-20 days after order confirmation. For custom sizes, it may be 20-30 days. We ship via sea, air, or express based on your request. -
Q: What is the minimum order quantity (MOQ)?
A: For standard sizes, MOQ is 100 pieces. For custom sizes, MOQ is 500 pieces. Smaller quantities are available for sampling purposes. -
Q: How do you ensure the quality of each bushing?
A: We perform 100% inspection on dimensions (using CMM and micrometers), porosity (Archimedes method), and hardness (Brinell tester). A test report can be provided with each shipment. -
Q: Can you provide a sample before mass production?
A: Yes, we offer free samples for standard sizes (customer pays shipping). Custom samples are available at a nominal cost, which will be deducted from the first order.
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