CuSn10 Powder Metallurgy Bronze Bushing: High-Load Self-Lubricating Performance for Precision Machinery

CuSn10 powder metallurgy bronze bushings are engineered for applications that demand dependable shaft support, controlled friction, dimensional accuracy, and long service life. By combining a copper-tin alloy with a carefully controlled porous structure, this type of bushing provides both mechanical support and internal oil-retention capability. The result is a self-lubricating bearing component that can operate with reduced maintenance in many industrial environments.

The Powder Metallurgy Bronze Bushing, code A0667, is manufactured from CuSn10 material through a controlled sequence of powder compaction, sintering, sizing, precision inspection, and vacuum oil impregnation. Its compact specification is 10G7 × 13s7 × 10 mm, with a 0.4 × 45° chamfer, a density of 5.7–5.8 g/cm³, a weight of approximately 3.36–3.41 g, and concentricity controlled to no more than 0.05 mm. These characteristics make it suitable for precision machinery, automotive components, hydraulic systems, fans, refrigeration equipment, household appliances, and other motion assemblies.

Unlike a conventional solid bushing that depends entirely on external lubrication, a porous sintered bronze bushing can retain oil within its interconnected pores. During operation, the oil gradually reaches the working surface and helps form a lubricating film between the bushing and shaft. This reduces direct metal-to-metal contact, limits wear, and supports stable operation over extended periods.

The product is manufactured by Jiande Welfine Technology Co., Ltd., an established powder metallurgy manufacturer with experience in sintered bushings, self-lubricating bearings, and precision components. The company supports OEM and ODM production based on customer drawings, samples, and technical requirements, allowing the bushing geometry, material, tolerance, oil type, and production quantity to be adapted for different applications.

Product Overview

A bronze bushing is a cylindrical bearing component used to guide, support, and protect a rotating or oscillating shaft. It is often installed in a housing, linkage, gear assembly, motor, pump, valve, appliance, or machine frame. The bushing creates a controlled sliding interface and helps maintain shaft alignment while absorbing friction and mechanical loads.

The CuSn10 Powder Metallurgy Bronze Bushing uses a copper-based alloy containing approximately 10% tin. Tin improves the hardness, wear resistance, and load-bearing characteristics of the copper matrix. The powder metallurgy process further enhances performance by producing a uniform internal structure with controlled porosity.

Product Item	Specification
Product Name	Powder Metallurgy Bronze Bushing
Product Code	A0667
Material	CuSn10 copper-tin bronze
Nominal Size	10G7 × 13s7 × 10 mm
Chamfer	0.4 × 45°
Weight	3.36–3.41 g
Density	5.7–5.8 g/cm³
Concentricity	≤0.05 mm
Key Dimension Control	Within approximately ±0.02 mm for specified dimensions
Oil Impregnation	46# mechanical oil under an 80°C vacuum environment
Sintering Parameter	TCI 690 ± 30°C
Manufacturing Route	Compaction, sintering, sizing, inspection, oil impregnation, and packaging

Although the A0667 bushing is a compact component, its performance depends on the coordinated control of many factors. Powder composition affects strength and wear resistance. Compaction affects density distribution and dimensional stability. Sintering determines metallurgical bonding and structural integrity. Sizing improves dimensional accuracy, while vacuum oil impregnation determines the lubrication condition of the finished part.

For this reason, a high-quality sintered bushing cannot be evaluated only by its external appearance or nominal material designation. Consistent performance requires controlled raw materials, stable equipment, repeatable process parameters, accurate tooling, and final inspection based on the customer’s technical requirements.

Powder Metallurgy Bronze Bushing (A0667)

Why CuSn10 Is Suitable for Bronze Bushings

CuSn10 is a copper-tin bronze alloy selected for its balanced combination of wear resistance, load capacity, thermal conductivity, and corrosion resistance. Pure copper offers good thermal and electrical conductivity but is relatively soft for many sliding-bearing applications. Adding tin increases the hardness and improves the alloy’s ability to resist surface damage under friction.

In a bushing, the material must withstand repeated contact with a shaft while maintaining an accurate internal diameter. It must also tolerate starting and stopping, moderate impact, vibration, and changes in operating load. CuSn10 provides a practical balance between strength and conformability, enabling the bushing to support the shaft without becoming excessively brittle.

The copper-based matrix also helps dissipate heat generated at the sliding interface. Heat dissipation is important because excessive temperature can reduce oil viscosity, accelerate oxidation, and increase wear. By combining copper’s thermal properties with tin-enhanced hardness and an oil-retaining pore structure, CuSn10 powder metallurgy bronze can provide dependable performance in many medium-load and moderate-speed applications.

Controlled Porosity for Self-Lubrication

The defining feature of a sintered bronze bushing is its controlled porosity. During powder compaction and sintering, the bronze powder particles bond together without eliminating every internal void. The resulting interconnected pores can be filled with lubricating oil.

When the bushing is not rotating, the oil remains distributed within the pore network. During operation, heat, movement, and capillary action encourage a portion of the oil to migrate toward the sliding surface. The oil forms a lubricating film that reduces friction and separates the shaft from the bronze matrix. When operation stops, some oil can return to the pores as the component cools.

This process does not mean that the bushing is suitable for every load, speed, temperature, or environment without maintenance. Operating conditions must still be evaluated carefully. However, compared with a dry solid bushing, an oil-impregnated sintered bushing can significantly reduce the need for frequent external lubrication under suitable working conditions.

Balance Between Strength and Oil Retention

Porosity must be carefully controlled. Excessive porosity can reduce density and mechanical strength, while insufficient porosity can limit oil storage and reduce the self-lubricating effect. The target structure must provide enough solid material to support the applied load while retaining an effective volume of lubricating oil.

This balance is one of the main technical advantages of powder metallurgy. By controlling powder formulation, pressing pressure, tooling geometry, sintering conditions, and sizing parameters, the manufacturer can produce a repeatable internal structure. The final density range for the A0667 bushing is controlled at 5.7–5.8 g/cm³, supporting stable product performance and consistent oil impregnation.

How Powder Metallurgy Improves Bushing Performance

Powder metallurgy manufactures components from prepared metal powders rather than machining the complete shape from bar stock or casting a near-net-shape part. For bushings, the process allows the manufacturer to control the material distribution, pore structure, dimensions, and production repeatability.

The main production stages for the CuSn10 bushing include powder preparation, die filling, compaction, sintering, sizing, dimensional inspection, cleaning, vacuum oil impregnation, surface inspection, and packaging. Each stage contributes to the final quality of the product.

Powder Preparation and Raw Material Control

The first stage is the preparation of the copper-tin powder mixture. The composition and particle-size distribution influence flowability, compactibility, density uniformity, sintering behavior, surface quality, and final mechanical properties.

Raw material inspection is performed for each batch of copper-based powder. Composition and particle-size testing help verify that the powder meets the applicable internal and customer requirements. Consistent raw materials provide a stable foundation for repeatable compaction and sintering.

Particle size is particularly important because it affects how powder fills the die cavity. A stable particle distribution can improve filling consistency and reduce variation between parts. It also affects the size and connectivity of pores after sintering, which in turn influences oil retention and strength.

Precision Compaction

During compaction, the prepared powder is placed into a precision die and compressed to form the basic bushing geometry. The tooling determines the outside diameter, inside diameter, length, chamfer features, and other design details.

Compaction pressure must be controlled to achieve a suitable green density without damaging the compact. Uneven powder filling or pressure distribution can cause density gradients, distortion, cracking, or dimensional variation. Advanced presses and carefully maintained tooling help reduce these risks.

For a small precision bushing such as A0667, dimensional control begins before sintering. The compact must have sufficient strength for handling while maintaining the intended material distribution. The production team also monitors the condition of the dies, punches, and forming surfaces because tooling wear can gradually affect product dimensions.

Controlled Sintering

Sintering heats the compacted powder in a controlled atmosphere. At the sintering temperature, adjacent metal particles bond together, increasing strength and creating a stable porous bronze structure. The sintering cycle includes heating, temperature holding, and controlled cooling.

The specified sintering parameter for the A0667 product is TCI 690 ± 30°C. Maintaining a controlled thermal cycle is important because overheating can change the pore structure or cause unwanted dimensional effects, while insufficient heating can result in weak bonding between particles.

Atmosphere control also matters. The sintering environment must protect the copper-tin material from excessive oxidation and support consistent metallurgical bonding. Stable furnace operation helps reduce variation in hardness, strength, shrinkage, and dimensional accuracy from batch to batch.

Sizing and Precision Correction

After sintering, the bushing may require sizing to achieve the specified dimensions and improve roundness, straightness, and surface condition. Sizing applies controlled pressure through a precision tool, correcting small dimensional deviations without removing significant material.

This process is one of the reasons powder metallurgy bushings can achieve excellent repeatability in mass production. Instead of relying only on extensive machining, sizing provides an efficient way to bring a sintered component within the required tolerance range while preserving the porous structure.

For A0667, key dimensions are controlled within approximately ±0.02 mm, and concentricity is maintained at no more than 0.05 mm. These requirements help the bushing fit correctly into its housing and maintain proper alignment with the mating shaft.

Cleaning and Vacuum Oil Impregnation

Before oil impregnation, the workpiece is cleaned to remove powder residue, handling contamination, and other foreign matter. Clean surfaces are important for consistent oil penetration and for preventing oil stains or contaminants from affecting assembly.

The bushings are immersed in 46# mechanical oil for approximately 20 minutes in an 80°C vacuum environment. Vacuum treatment helps remove air from the internal pores. When the vacuum is released while the parts remain in contact with the oil, the oil can penetrate more effectively into the pore network.

After impregnation, the external surface is checked and cleaned so that the bushing can be packed without unwanted oil contamination. Proper packaging helps protect the finished component during storage, handling, and shipment.

Inspection and Traceability

Quality inspection is performed throughout production rather than only at the end. First-article inspection and online dimensional monitoring are used during compaction, sintering, and sizing. Early detection helps prevent defective parts from moving to later stages.

Finished product inspection includes full dimensional inspection for the specified parts. Sampling tests may include density, hardness, wear resistance, and other performance characteristics. This combination of 100% dimensional checking and sampling-based material verification supports stable quality while maintaining efficient production.

The company’s quality management system is supported by ISO 9001:2015 and IATF 16949:2016 certifications. These systems provide a framework for process control, documentation, corrective action, customer communication, and continuous improvement.

Advantages Compared with Conventional Bushing Solutions

Customers may compare CuSn10 powder metallurgy bushings with machined bronze bushings, cast bronze bushings, brass bushings, polymer bushings, or steel-backed composite bearings. Each solution has its own suitable operating range, but the sintered bronze design offers several important advantages for applications requiring integrated lubrication and repeatable production.

Compared with Standard Brass Bushings

Standard brass can be economical and easy to machine, but it generally does not provide the same oil-retention capability as a porous sintered bronze bushing. A conventional brass bushing normally depends on external grease or oil supplied during installation or maintenance.

The CuSn10 sintered bushing stores oil throughout its internal pore structure. This helps reduce friction during operation and can extend lubrication intervals. CuSn10 also offers stronger wear resistance than many standard brass grades when used in appropriate sliding conditions.

Performance Factor	CuSn10 Powder Metallurgy Bronze	Standard Brass Bushing
Oil Retention	High due to controlled porosity	Generally low in a solid structure
Self-Lubrication	Supported by impregnated oil	Normally requires external lubrication
Wear Resistance	Excellent for suitable sliding conditions	Moderate to good depending on grade
Dimensional Repeatability	High in controlled powder metallurgy production	Dependent on casting or machining process
Material Utilization	High, especially in near-net-shape production	Lower when significant machining is required
Maintenance Requirement	Reduced under suitable conditions	More dependent on regular lubrication

Compared with Cast Bronze Bushings

Cast bronze bushings can provide good load-bearing performance, particularly in heavy industrial equipment. However, conventional cast components may require additional machining to achieve tight dimensional tolerances. The casting process can also involve concerns related to shrinkage, inclusions, segregation, and variation in internal structure.

Powder metallurgy provides a more controlled route for producing small and medium-sized bushings in large quantities. The material is formed close to the final geometry, reducing machining waste. The porous structure also enables oil impregnation, which is not a natural feature of a fully dense cast bronze bushing.

A cast bushing may be the right choice for very large components, extremely heavy loads, or specialized lubrication systems. However, where compact size, self-lubrication, dimensional consistency, and cost-efficient repeated production are priorities, the sintered bronze alternative can be more competitive.

Compared with Fully Machined Bronze Parts

Machining a bushing from solid bronze bar can provide accurate dimensions and a dense material structure. However, machining removes material and may require multiple operations, including turning, boring, facing, chamfering, and finishing. The process can lead to higher material consumption, longer cycle times, and increased labor or tooling costs.

Powder metallurgy reduces material waste by forming the part close to its final shape. Sizing and limited secondary operations can then be used to achieve the required accuracy. This is particularly valuable when large quantities of identical bushings are needed.

The powder metallurgy route also creates the porous structure required for oil impregnation. A fully dense machined bronze bushing cannot provide the same internal oil reservoir without additional design features or lubrication systems.

Compared with Polymer Bushings

Polymer bushings can provide low friction, low weight, and corrosion resistance. They are useful in many applications, but their temperature capability, dimensional stability, creep resistance, and load capacity depend strongly on the polymer formulation and operating environment.

CuSn10 bronze bushings are appropriate when a metallic bearing surface, higher thermal conductivity, and stronger resistance to mechanical loading are required. They can be used in machinery where impact, vibration, or heat would challenge certain polymer materials. Selection should still consider shaft hardness, speed, load, temperature, and environmental contamination.

Dimensional Accuracy and Assembly Reliability

A bushing can only perform properly when it is correctly matched to the housing and shaft. Excessive clearance may cause vibration, noise, impact, and uneven wear. Insufficient clearance may cause interference, overheating, seizure, or difficult assembly. Concentricity and roundness also affect the distribution of the load around the shaft.

The A0667 product has a specified size of 10G7 × 13s7 × 10 mm and a concentricity requirement of no more than 0.05 mm. The 0.4 × 45° chamfer helps guide the bushing into the housing and reduces the risk of edge interference during installation.

Chamfers also help protect the bushing edge from damage. A sharp edge can scrape material from the housing, interfere with insertion, or become distorted under assembly pressure. A controlled chamfer creates a smoother transition between the end face and cylindrical surface.

Installation should be performed with a suitable press or assembly tool. Applying force directly to an unsupported edge or using an improperly aligned tool may deform the bushing. The housing should be clean and free from burrs, and the shaft should meet the specified surface-finish and dimensional requirements.

For applications with high loads, oscillating motion, or frequent start-stop cycles, the installation clearance should be confirmed through engineering analysis or prototype testing. The correct fit depends not only on the nominal bushing size but also on the housing material, shaft diameter, operating temperature, applied load, and expected speed.

Performance in High-Load and Repeated-Motion Applications

High-load applications place demanding requirements on a bushing. The component must carry radial or oscillating loads while limiting wear and maintaining alignment. It may also experience impact, vibration, contamination, and inconsistent operating cycles.

CuSn10 improves the load-bearing capability of the copper matrix through tin alloying. The sintered structure distributes contact stresses through the material, while the impregnated oil helps reduce friction at the sliding interface. This combination is especially useful in articulated joints, guide mechanisms, hydraulic components, transmission assemblies, and machine linkages.

In repeated-motion systems, the bushing may not complete many full rotations. Instead, it may oscillate through a small angular range. Oscillating motion can be challenging because the same surface zones experience repeated contact and the oil may not redistribute in exactly the same way as it does during continuous rotation.

For such applications, the bushing design should be evaluated using the actual load, motion angle, cycle rate, temperature, and lubrication condition. The porous CuSn10 structure can provide a reliable self-lubricating solution, but the operating limits should be validated before final production release.

In high-load equipment, correct alignment is equally important. Even a strong bushing may wear prematurely if the shaft is bent, the housing is misaligned, or the load is concentrated at one edge. Proper machining and assembly practices should therefore accompany the selection of the bushing material.

Application Areas

Automotive Components

Automotive systems use bushings in mechanisms that require controlled movement, vibration reduction, and compact packaging. CuSn10 powder metallurgy bushings can be applied in selected engine, chassis, transmission, actuator, and linkage components where the operating conditions are compatible with the material and lubrication design.

Their small size, stable dimensions, and reduced lubrication requirement make them suitable for high-volume vehicle component production. The manufacturing process also supports repeatability, which is essential when many identical components must be assembled into a vehicle system.

Electric Motors and Fans

Electric motors, fans, and small rotating assemblies require shaft support with low friction and reliable dimensional stability. The self-lubricating characteristics of impregnated bronze can help maintain smooth rotation while reducing the need for frequent service.

Good thermal conductivity is also valuable in motor and fan applications because heat generated during operation must be transferred away from the bearing area. Shaft alignment, operating speed, radial load, and motor temperature should be reviewed when selecting the final bushing design.

Refrigeration and Household Appliances

Household appliances often contain compact transmission structures, fans, dampers, hinges, and motor-driven mechanisms. These systems may be expected to operate for long periods with limited maintenance access.

A sintered bronze bushing can provide a compact bearing solution with integrated lubrication. Its near-net-shape manufacturing route is suitable for repeated production, while the controlled chamfer and dimensional tolerance support efficient assembly on automated or semi-automated production lines.

Hydraulic Pumps and Valve Assemblies

Hydraulic systems require components that can maintain alignment and resist wear under pressure, vibration, and repeated movement. Bushings may be used as guide components, support elements, or parts of pump and valve mechanisms.

CuSn10 bronze offers good wear resistance and corrosion resistance for many industrial environments. However, compatibility with the hydraulic fluid, temperature, pressure, shaft material, and system cleanliness should always be verified. The bushing should not be selected solely on the basis of material name without reviewing the complete hydraulic operating condition.

Precision Machine Tools

Machine tools depend on accurate movement and stable component relationships. Bushings may support spindles, guide shafts, adjustment mechanisms, or auxiliary motion systems. The dimensional consistency of powder metallurgy components can contribute to repeatable assembly and smooth operation.

For precision equipment, the specified concentricity and fit are particularly important. Any error in installation or housing alignment can affect motion accuracy. Where necessary, the manufacturer can review drawings and recommend suitable tolerances, finishing requirements, and inspection methods.

Agricultural and Construction Machinery

Agricultural and construction equipment may operate under dusty, humid, vibrating, and impact-prone conditions. Bushings in these machines can be used in articulated joints, transmission mechanisms, guide structures, and actuator connections.

The oil-retaining structure helps reduce dependence on frequent lubrication, which can be valuable where maintenance access is difficult. Nevertheless, external contamination should be controlled through proper sealing, shielding, and cleaning. If abrasive particles enter the sliding interface, they can accelerate wear regardless of the bushing material.

Automation Equipment

Automated machinery often requires compact components that can perform consistently through thousands or millions of movement cycles. Dimensional accuracy, low friction, and stable operation are important for grippers, guide mechanisms, indexing assemblies, and motion modules.

The ability to customize the bushing based on customer drawings allows the product to be adapted to special dimensions, mounting conditions, and production requirements. Prototype quantities can be supported before moving to larger-scale production.

Quality Advantages of the Manufacturing Partner

Product performance depends on more than the CuSn10 material itself. The manufacturing partner must be able to control the entire production chain, from powder inspection to finished-product packaging.

Jiande Welfine Technology Co., Ltd. was established in 2001 and focuses on powder metallurgy sintering, self-lubricating bushings, and precision components. Its production base covers approximately 13,039 square meters and includes presses, high-temperature sintering furnaces, precision forming equipment, and testing facilities.

More than 20 years of experience in powder metallurgy supports the company’s ability to manage complex production requirements. The company employs more than 150 skilled personnel and provides customized OEM and ODM services for customers requiring different dimensions, materials, tolerances, densities, and performance characteristics.

Integrated Production Capability

An integrated manufacturing process helps reduce communication gaps between design, tooling, production, inspection, and delivery. When the same organization manages the major stages of production, engineering feedback can be transferred more quickly from one process to another.

For example, if a customer requires a tighter concentricity tolerance, a different chamfer, a revised oil grade, or a modified density range, the engineering team can evaluate the effect on tooling, compaction, sizing, sintering, and inspection. This is more efficient than treating each stage as an isolated operation.

Support for Custom Drawings and Samples

Many bushing applications do not use a universal standard size. The housing, shaft, load, speed, available space, and installation method may require a specific design. Custom production based on customer drawings or samples allows the bushing to be integrated into the actual machine rather than forcing the machine to accommodate an unsuitable standard part.

Customization may include outside diameter, inside diameter, length, chamfer, tolerance, material composition, density, oil type, surface treatment, and packaging. The manufacturer can also support small-batch prototyping before mass production, helping customers verify assembly and performance.

Quality Management and Process Discipline

ISO 9001:2015 certification demonstrates the use of a structured quality management system. IATF 16949:2016 certification reflects quality-management capability relevant to automotive production requirements. These systems support controlled procedures, documented inspections, traceability, supplier management, and corrective action.

Certification alone does not replace technical evaluation, but it provides an important framework for consistent manufacturing. Customers can further specify inspection plans, sampling levels, material reports, dimensional reports, performance testing, and packaging requirements according to their purchasing standards.

How to Select the Correct Sintered Bronze Bushing

Choosing a bushing requires more than matching the inside and outside diameters. The application should be reviewed as a complete operating system.

Load

Determine the radial, axial, oscillating, and impact loads applied to the bushing. The maximum load may occur during startup, stopping, acceleration, shock, or abnormal operation rather than during steady running.

Speed and Motion

Identify whether the movement is continuous rotation, intermittent rotation, oscillation, reciprocation, or a combination of motions. Record the rotational speed or cycle frequency. Frictional heat increases with speed and load, so both factors must be considered together.

Temperature

Operating temperature affects oil viscosity, dimensional clearances, material strength, and oxidation. The expected temperature range should include ambient conditions, heat from nearby components, and temperature generated by friction.

Lubrication and Fluid Compatibility

The standard product uses 46# mechanical oil for vacuum impregnation. If the bushing will contact another lubricant, hydraulic fluid, cleaning agent, or process chemical, compatibility should be verified. Some fluids can dilute, remove, oxidize, or chemically alter the impregnated oil.

Shaft and Housing Conditions

The mating shaft should have suitable diameter accuracy, surface finish, hardness, and straightness. The housing bore should be clean, round, and correctly aligned. Burrs, misalignment, rough surfaces, or excessive interference can damage the bushing during assembly or operation.

Environmental Conditions

Dust, water, abrasive particles, corrosive chemicals, and high humidity can affect bearing life. Seals, shields, protective covers, and appropriate maintenance procedures may be necessary in contaminated environments.

Expected Service Life

Define the required service life in hours, cycles, distance, or production units. A bushing designed for occasional movement may not be suitable for continuous high-speed rotation. Prototype testing under representative conditions is recommended when the application is critical or the operating limits are uncertain.

Ordering and Technical Support

Customers seeking a quotation should provide drawings, samples, or detailed technical information. Useful data includes material requirements, dimensions, tolerances, quantity, annual demand, operating load, speed, temperature, lubrication conditions, shaft material, housing material, and packaging requirements.

Based on the supplied information, the engineering team can evaluate the manufacturing route and provide a more accurate quotation. Standard orders are generally scheduled for delivery within 7–15 working days, while urgent orders may be reviewed for priority production depending on tooling, material availability, quantity, and inspection requirements.

International delivery can be arranged through express services such as DHL or FedEx, as well as sea and air freight. Packaging should be selected according to the part size, oil condition, quantity, shipping distance, and storage period. Proper packaging helps prevent deformation, contamination, corrosion, and oil leakage during transport.

After delivery, technical support can include installation guidance and dimensional review. If products are found to have mismatched dimensions or materials due to a manufacturing issue, replacement support may be provided according to the agreed quality and after-sales terms.

Frequently Asked Questions

Can a CuSn10 powder metallurgy bushing operate without regular lubrication?

Under suitable operating conditions, the oil retained in the porous structure can provide continuous or replenished lubrication and significantly reduce the need for regular external lubrication. However, “maintenance-free” should not be interpreted as suitable for unlimited loads, speeds, or temperatures. Periodic inspection remains recommended, especially in high-load, high-temperature, contaminated, or safety-critical applications.

Is the A0667 bushing suitable for high-speed rotating equipment?

It may be suitable for many medium- and high-speed applications when the load, clearance, temperature, shaft condition, and lubrication requirements are within the design range. The actual speed limit should be confirmed through engineering evaluation or testing because speed and load together determine frictional heat and wear.

What is the main difference between a sintered bronze bushing and a cast bronze bushing?

A sintered bronze bushing has a controlled porous structure that can be filled with oil, providing self-lubricating capability. It also offers high dimensional repeatability and efficient mass production. A cast bronze bushing is generally denser and may be preferred for certain very heavy-load or large-size applications, but it usually depends more heavily on external lubrication and additional machining.

Why is vacuum oil impregnation used?

Vacuum oil impregnation removes air from the internal pores and allows mechanical oil to penetrate more deeply and consistently. The oil is stored inside the bushing and can migrate toward the sliding surface during operation. This process helps create the self-lubricating function of the finished component.

What does the CuSn10 material designation mean?

CuSn10 identifies a copper-tin bronze containing approximately 10% tin. The tin addition improves hardness and wear resistance compared with pure copper. In powder metallurgy production, the alloy is formed into a controlled porous structure suitable for oil impregnation.

What does the 0.4 × 45° chamfer do?

The chamfer creates a beveled edge measuring approximately 0.4 mm at an angle of 45 degrees. It helps guide the bushing into the housing, reduces the risk of edge interference, and protects the end edge during assembly.

How does density affect bushing performance?

Density affects mechanical strength, load capacity, oil-retention volume, wear resistance, and dimensional stability. Excessively low density may reduce strength, while excessively high density may reduce the volume available for lubricating oil. The specified density range of 5.7–5.8 g/cm³ supports a controlled balance between these properties.

Can the product be customized for a special drawing?

Yes. Custom OEM and ODM production is available based on customer drawings, samples, and technical requirements. Customization may involve dimensions, tolerances, material, density, chamfer geometry, oil type, inspection requirements, and packaging.

What information should be provided for a custom quotation?

Customers should provide a two-dimensional drawing or sample whenever possible. Load, speed, movement type, temperature, environment, shaft material, housing material, quantity, annual demand, and delivery requirements are also helpful. More complete information allows the manufacturer to recommend a more appropriate process and provide a more precise quotation.

How should the bushing be installed?

The housing should be clean, correctly aligned, and free of burrs. A suitable press or assembly fixture should apply force evenly and concentrically. The bushing should not be hammered directly, and force should not be applied through a thin or unsupported edge. The shaft should be inspected before final assembly.

What factors most strongly affect service life?

Service life is influenced by load, speed, temperature, lubrication, installation accuracy, shaft surface condition, housing alignment, contamination, motion type, and duty cycle. Correct material selection and careful assembly can significantly extend the service life of the bushing.

Conclusion

The CuSn10 Powder Metallurgy Bronze Bushing is a practical solution for machinery that requires reliable sliding support, controlled friction, compact dimensions, and reduced lubrication demand. Its copper-tin alloy provides wear resistance and load capacity, while its sintered porous structure stores oil and supports self-lubricating operation.

The A0667 product demonstrates the benefits of an integrated powder metallurgy process. Compaction creates the basic geometry, controlled sintering develops the bronze structure, sizing improves dimensional accuracy, inspection verifies conformity, and vacuum oil impregnation provides the internal lubrication reservoir. The specified density, concentricity, chamfer, weight, and dimensional tolerances support consistent assembly and performance.

Compared with many standard brass, fully machined bronze, and solid cast bushing solutions, the product offers strong advantages in oil retention, material utilization, production repeatability, and maintenance reduction. Its performance is especially valuable in electric motors, fans, refrigeration equipment, automotive components, hydraulic systems, agricultural machinery, construction equipment, machine tools, household appliances, and automation systems.

Jiande Welfine Technology Co., Ltd. combines powder metallurgy expertise, modern production equipment, inspection capability, and OEM/ODM engineering support. With ISO 9001:2015 and IATF 16949:2016 quality systems, the company can manufacture standard and customized sintered bushings based on drawings, samples, and application requirements.

For high-load or high-cycle applications, the correct bushing should always be selected according to the complete operating condition. When load, speed, temperature, fit, lubrication, and environment are properly evaluated, a CuSn10 powder metallurgy bronze bushing can provide stable operation, lower maintenance requirements, and long-term value for precision machinery.

References

1. Product technical information for Powder Metallurgy Bronze Bushing A0667, including material, dimensions, density, oil impregnation, and inspection requirements.

2. ISO 9001:2015, Quality Management Systems—Requirements.

3. IATF 16949:2016, Quality Management System Requirements for Automotive Production and Relevant Service Parts Organizations.

4. Powder Metallurgy Materials and Processes, general principles of metal powder compaction, sintering, sizing, and porous bearing production.

5. Engineering guidance on plain bearings, self-lubricating bushings, sliding contact, load-speed relationships, and bearing installation practices.

Product: Powder Metallurgy Bronze Bushing (A0667)