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Help CenterOil-Impregnated Sintered Bronze Bushing, Tolerances IT8, Radial Clearance 0.025-0.065 Mm, ISO 4379 Compliant
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Anping County Boli Hardware Wiremesh Products Factory, established in 1998 and headquartered in Hengshui, Hebei, China, is a professional manufacturer specializing in high-performance metal components. With an annual export value exceeding US$5 million and a global presence across North America, South America, Europe, Asia, Africa, and Oceania, we are proud to introduce our Oil-Impregnated Sintered Bronze Bushing — a precision-engineered solution for demanding industrial applications. This bushing combines the unique self-lubricating properties of sintered bronze with tight IT8 tolerances and a controlled radial clearance of 0.025–0.065 mm, ensuring reliable, low-maintenance operation under a wide range of conditions. Fully compliant with ISO 4379, our product is designed to meet the highest standards of durability and performance, making it an ideal choice for OEMs, machinery rebuilders, and maintenance professionals worldwide.
Key Features & Technical Specifications
- Self-Lubricating Design: The oil-impregnated sintered bronze matrix continuously releases lubricant during operation, reducing friction and wear without external oiling systems.
- Precision Tolerances (IT8): Each bushing is manufactured to IT8 tolerance grade, ensuring consistent fit and alignment with mating shafts and housings.
- Controlled Radial Clearance: Radial clearance is strictly maintained between 0.025 mm and 0.065 mm, optimizing load distribution and minimizing vibration.
- ISO 4379 Compliance: Our bushings meet the international standard for plain bearings, guaranteeing quality, interchangeability, and reliability.
- Wide Operating Temperature Range: Suitable for continuous use from -20°C to +120°C, with peak performance up to 150°C.
- Low Maintenance: The inherent oil impregnation eliminates the need for frequent re-greasing, reducing downtime and maintenance costs.
- Corrosion & Wear Resistance: Bronze material offers excellent resistance to corrosion, oxidation, and abrasive wear, extending service life in harsh environments.
- Customizable Dimensions: Available in a wide range of inner diameters, outer diameters, and lengths to fit specific application requirements — contact us for custom sizes.
Technical Data Table
| Parameter | Specification |
|---|---|
| Material | Sintered Bronze (CuSn10 / equivalent) |
| Lubrication | Oil-Impregnated (Oil content: 18–25% by volume) |
| Tolerance Grade | IT8 (ISO 286) |
| Radial Clearance | 0.025 – 0.065 mm (as-sintered) |
| Standard | ISO 4379 |
| Max Permissible PV Value | 2.0 N/mm² · m/s (for continuous operation) |
| Operating Temperature | -20°C to +120°C (continuous), up to 150°C (peak) |
| Coefficient of Friction | 0.12 – 0.20 (static) / 0.08 – 0.15 (dynamic) |
Benefits for Your Application
Our Oil-Impregnated Sintered Bronze Bushings are engineered to deliver tangible benefits that directly impact your bottom line:
- Reduced Downtime: Self-lubrication eliminates the need for periodic oiling, keeping your equipment running longer between maintenance intervals.
- Improved Reliability: Precise IT8 tolerances and controlled clearance ensure consistent performance, even under fluctuating loads or misalignment.
- Cost Savings: Lower friction reduces energy consumption, while extended bushing life minimizes replacement frequency and inventory costs.
- Silent Operation: The bronze matrix and oil film dampen noise and vibration, contributing to a quieter workspace.
- Versatility: Suitable for use in agricultural machinery, automotive suspensions, conveyor systems, hydraulic pumps, textile machines, and more.
Trust & Quality Assurance
As a manufacturer with over 25 years of experience, Anping County Boli Hardware Wiremesh Products Factory has built a reputation for delivering consistent quality. Our annual export value of US$5–10 million reflects the trust of customers across 30+ countries, including demanding markets in North America, Western Europe, and Southeast Asia. We ship from major Chinese ports such as Tianjin, Qingdao, Shanghai, and Foshan, ensuring efficient logistics worldwide. Each bushing undergoes rigorous dimensional inspection and oil content verification to confirm compliance with ISO 4379 and your specifications. Our dedicated engineering team is available to assist with custom designs, applications support, and sample requests. Choose our bushings for a reliable, long-lasting bearing solution that keeps your operations running smoothly.
Frequently Asked Questions (FAQ)
Q1: What is the typical oil content of the bushings, and can it be customized?
A: Our standard oil-impregnated bronze bushings contain 18–25% oil by volume. Higher or lower oil content is available upon request to suit specific speed or load conditions.
Q2: Are these bushings suitable for high-temperature applications above 150°C?
A: For continuous operation, we recommend keeping temperatures below 120°C. For short-term peaks up to 150°C, performance may be acceptable. For higher temperatures, consider alternative materials; contact our technical team for guidance.
Q3: What is the maximum static load these bushings can handle?
A: The maximum static load depends on the bushing dimensions and wall thickness. As a general rule, the permissible static surface pressure is up to 25 N/mm² for short-term loads. Please provide your specific dimensions for a load calculation.
Q4: Do you offer custom sizes beyond the standard range?
A: Yes, we can produce custom inner diameters, outer diameters, lengths, and flanged styles. Minimum order quantities may apply for custom tooling. Please send your drawing or specifications for a quotation.
Q5: How does the radial clearance of 0.025–0.065 mm affect performance?
A: This clearance range provides an optimal balance between lubricant film retention and thermal expansion accommodation. It allows for smooth operation under normal loads while preventing seizure due to thermal growth.
Q6: Can these bushings be used in marine or humid environments?
A: Bronze is naturally corrosion-resistant, making these bushings suitable for marine and humid environments. However, prolonged exposure to acidic or alkaline conditions may require additional protective coatings — consult our team for recommendations.
Q7: What is the typical lead time for standard-sized bushings?
A: For standard dimensions (e.g., common IDs and ODs), lead time is typically 10–15 working days after order confirmation. Custom sizes may require 20–30 working days. We offer express shipping options for urgent orders.
Q8: Do you provide samples for testing before bulk purchase?
A: Yes, sample orders are welcome. We can supply up to 5 pieces per size for evaluation. Sample cost is usually waived for first-time customers, with shipping charges applicable. Please contact our sales team to arrange.
For technical inquiries, quotations, or to place an order, please reach out to our sales team. We are committed to providing high-quality Oil-Impregnated Sintered Bronze Bushings that meet your exact requirements. Your satisfaction is our priority.
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