Self-lubricating Washer, Understanding the Versatility of 932 Bronze in Thrust Bearing Washers: ASTM B505 and EN1982 Standards
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Self-Lubricating Washer – Thrust Bearing Washer,
Thrust bearing washers are critical components in machinery, designed to manage axial loads and facilitate smooth rotational movement. Among the various materials utilized for these components, 932 Bronze, also known as SAE 660 Bearing Bronze, stands out for its superior performance and durability. This blog post explores the benefits of using 932 Bronze for thrust bearing washers, adhering to ASTM B505 and EN1982 standards, and compares it with other bronze materials.
Choosing the right material for thrust bearing washers significantly affects the efficiency and longevity of machinery. 932 Bronze, conforming to ASTM B505 and EN1982 standards, offers a reliable solution with its excellent wear resistance, conformability, and moderate corrosion resistance. For designers and engineers, understanding these properties and standards helps in selecting the excellent material for their specific needs, ensuring optimal performance and durability of the machinery components.
The Significance of 932 Bronze (SAE 660 Bearing Bronze)
932 Bronze is a high-lead bronze alloy, primarily composed of copper (Cu), tin (Sn), and lead (Pb). Its typical composition—83% copper, 7% tin, and 7% lead—provides an excellent balance of strength, wear resistance, and conformability. This makes it ideal for applications requiring reliable load-bearing capabilities over a wide range of operating conditions.
Comparison with Other Bronze Alloys
While 932 Bronze is a popular choice for thrust bearing washers, other bronze alloys also find application in this field, each offering distinct advantages:
Aluminum Bronze (e.g., CuAl10Fe5Ni5): Known for its higher strength and excellent corrosion resistance, aluminum bronze is suitable for harsher environments but at a higher cost.
Phosphor Bronze (e.g., CuSn8): This alloy provides excellent fatigue resistance and is preferable in applications involving oscillating or intermittent loads.
Self-lubricating ASTM C93200 Bronze Bearing, Cast Bronze Sleeve Bushings
Key Properties: High Wear Resistance: 932 Bronze offers excellent resistance against wear and abrasion, which is crucial for components like thrust bearing washers that experience constant friction.
Good Conformability: The presence of lead in the alloy allows for slight realignment of the bearing surfaces under load, enhancing the bearing’s life by reducing the risk of edge loading.
Corrosion Resistance: While not the most corrosion-resistant among copper alloys, 932 Bronze withstands moderately corrosive environments, making it suitable for many industrial applications.
Self-lubricating washers represent a modern engineering solution that enhances efficiency, reduces maintenance costs, and minimizes environmental impact, making them a preferred choice in many demanding applications.
Adherence to Standards: ASTM B505 and EN1982, Engineered Thrust Washer
Self-lubricating washers are specialized components designed to operate without the need for additional lubrication, making them ideal for applications where traditional lubrication methods are impractical or impossible. These washers are particularly useful in environments that are dusty, dirty, or hard to access, where regular maintenance would be challenging.
The ASTM B505 standard specifies the requirements for continuous cast copper alloys, including chemical composition, mechanical properties, and permissible variations. For 932 Bronze, this standard ensures that the material produced has consistent quality, suitable for high load-bearing applications.
The EN1982 European standard provides similar specifications but with a focus on the broader European market. It encompasses material properties, casting methods, and quality assurance procedures, ensuring that the bronze washers meet rigorous international criteria.
Thrust Washers, Self-Lubricating, Applications of 932 Bronze Thrust Bearing Washers
Thrust bearing washers made from 932 Bronze are used in a variety of applications across several industries:
- Automotive: In transmissions and steering assemblies where moderate loads and speeds are encountered.
- General Machinery: In pumps and compressors where axial loads and rotational movements are a regular occurrence.
- Marine: In boat propeller shafts, where durable and reliable washers are needed to handle the stresses of marine environments.
Bronze bearings are highly versatile and can be manufactured in various forms to meet specific application requirements. Here are some of the common custom bearing designs made from bronze:
- Cylindrical Bushes: Standard sleeve bearings that support radial loads. They are commonly used in machinery where rotational or sliding movements are required.
- Flanged Bushes: These have a flange at one end to provide axial positioning and prevent movement along the axis of the shaft. They are useful in applications where the bearing needs to be fixed in place.
- Thrust Washers: Flat bearings that handle axial loads, preventing movement along the shaft. They are typically found in applications like automotive transmissions.
- Sliding Plates: Used in applications requiring sliding motion; they offer a large surface area to distribute the load evenly.
- Pintle Bearings: Utilized in heavy-duty applications and are capable of handling both radial and axial loads. They are often found in agricultural equipment and heavy machinery.
- Half-Bearings: These are semicircular and used when a full cylindrical bearing is not necessary. They are common in crankshaft and camshaft applications.
- Axial and Radial Segment Rings: Specialized bearings that support both axial and radial loads and are used in large-scale industrial machinery.
- Self-Aligning Spherical Bearings: These bearings compensate for shaft misalignment and are used in applications where alignment cannot be precisely controlled.
- Customized Bearing Designs: Bearings can be custom-made to meet specific requirements, including unusual shapes, sizes, or incorporating additional features like lubrication channels.
We can provide these bearings in various bronze alloys, depending on the application’s load, speed, and environmental requirements. This customization ensures optimal performance and longevity of the bearings in their specific applications.
Bronze bearings are widely available in various forms and specifications, catering to diverse industrial needs. Here’s an overview of the types of bronze bearings available, their characteristics, and where to find them:
Types of Bronze Bearings
- C93200 (SAE 660) Bearing Bronze:
- A standard material known for its excellent anti-friction properties and strength.
- Commonly used in sleeve bearings and bushings.
- High-Leaded Tin Bronzes:
- Alloys like C93800 and C94300 provide high lubricity, suitable for moderate loads and high speeds.
- Aluminum Bronzes (e.g., C95400):
- Known for their high strength and corrosion resistance, making them ideal for marine applications.
- Manganese Bronzes (e.g., C86300):
- These alloys combine high strength with excellent corrosion resistance, suitable for heavy loads.
Availability
- Stocked Items:
- Many suppliers offer a wide range of standard bronze bushings and bearings.
- Custom Orders:
- If standard sizes do not meet specific requirements, manufacturers often provide custom-made bronze bushings tailored to client specifications. This includes options for machining to print or making parts from samples.
- We offer both standard and custom sizes, ensuring that clients can find the right fit for their applications.
Applications
Bronze bearings are utilized across various industries due to their durability and resistance to corrosion. Common applications include:
- Hydraulic systems: Where high load capacities and resistance to wear are essential.
- Marine environments: For components exposed to seawater, where corrosion resistance is critical.
- Heavy machinery: In applications requiring robust performance under high stress and load conditions.
In summary, bronze bearings are readily available in numerous types and sizes, with options for both standard and custom solutions. Their versatility and durability make them suitable for a wide range of industrial applications.
The bronze alloys you mentioned are specifically designed for various applications, particularly in environments that demand high corrosion resistance and mechanical strength, such as hydroelectric turbines and offshore structures. Here’s a detailed overview of the key bronze alloys you referenced, including their features, characteristics, and applications.
CuSn7ZnPb7 Bronze
Features and Applications:
- Corrosion Resistance: Excellent resistance to seawater, making it suitable for marine environments.
- Mechanical Properties:
- Max. Permissible Static Load: Typically around 250 N/mm².
- Max. Permissible Dynamic Load: Approximately 120 N/mm².
- Coefficient of Friction (Dry): Generally ranges from 0.15 to 0.25.
- Coefficient of Friction (Water): Usually lower than dry conditions, enhancing performance in lubricated environments.
- Max. pU Value: Can reach up to 1.5 MPa*m/s, indicating good performance under load and speed.
- Applications: Ideal for hydraulic steelwork and components in hydroelectric turbines due to its robust mechanical properties and corrosion resistance.
CuAl10Fe5Ni5 Aluminum Bronze
Features and Applications:
- Corrosion Resistance: Outstanding resistance to seawater and saline environments, making it suitable for offshore applications.
- Mechanical Properties:
- Tensile Strength: Approximately 650 MPa.
- Yield Strength: About 280 MPa.
- Elongation: Typically around 13%.
- Hardness: Approximately 150 HB.
- Applications: Used in heavy-duty bearings, gears, and components exposed to extreme conditions, such as hydraulic engineering and marine applications. It is also favored for its wear resistance and ability to withstand high temperatures.
CuZn25Al5Mn4Fe3 Brass Alloy
Features and Applications:
- Corrosion Resistance: Good resistance to seawater, making it suitable for marine applications.
- Mechanical Properties:
- Max. Permissible Static Load: Typically higher than standard brass, suitable for heavy-duty applications.
- Max. Permissible Dynamic Load: Designed for low sliding speeds under high loads.
- Applications: This alloy is particularly effective in applications requiring high strength and wear resistance, such as in machinery and structural components.
CuSn12 Bronze Bushings
Features and Applications:
- Corrosion Resistance: Excellent, especially in seawater environments.
- Mechanical Properties:
- Max. Permissible Static Load: Generally around 250 N/mm².
- Max. Permissible Dynamic Load: Approximately 120 N/mm².
- Outstanding Tribological Properties: Excellent wear resistance and low friction characteristics.
- Applications: Commonly used in hydraulic steelwork and marine applications, particularly where high wear resistance is needed.
CuAl11Fe6Ni6 Aluminum Bronze
Features and Applications:
- Corrosion Resistance: Highly resistant to seawater and extreme conditions.
- Mechanical Properties:
- Tensile Strength: High, suitable for heavy loads.
- Yield Strength: Typically above 300 MPa.
- Applications: Ideal for hydraulic engineering and steelwork applications, particularly in environments subject to high stress and corrosion.
These bronze alloys are engineered to provide exceptional performance in demanding conditions, making them suitable for a wide range of industrial and marine applications. Their unique compositions contribute to their mechanical strength, wear resistance, and corrosion resistance, ensuring reliability and longevity in service.
| Lubricating Alloy Bronze Alloy Bearing Materials | |||||
| Bronze Alloy No. | Material no. | DIN | Material Description | Chemical analysis, EN | Bronze Alloy Application, |
| Bronze | CuSn7Zn4Pb7 (CC493K) Standard EN 1982 | CuSn7ZnPb RG7 DIN 1705 2.1090 |
Rg7 or gunmetal | Cu 81,0 – 85,0 Sn 5,4 – 8,0 Zn 2,0 – 5,0 Pb 5,0 – 8,0 Ni 2,0 max. P 0,10 max. |
It has good sliding and dry running properties and has a good machinability. We can offer different sizes and alloys on request |
| Aluminium Bronze | CuAl10Fe5Ni5 (CC333G), EN 1982 | DIN 1714 | CuAl10Fe5Ni5-C (CC333G) | CuAl10Ni | Cu 76,0 – 83,0 Al 8,5 – 10,5 Ni 4,0 – 6,0 Fe 4,0 – 5,5 Mn 3,0 max. |
Aluminumbronze is characterized by high mechanical values, even at low and higher temperatures. |
| Aluminium Bronze | CuAl10Ni5Fe4 (CW307G EN 1982 | DIN 17665, 17672 | CuAl10Ni5Fe4 (CW307G) | Cu rest Al 8,5 – 11,0 Ni 4,0 – 6,0 |
Excellent corrosion and seawater resistance and very durable. Suitable for applications in aggressive environments. |
| Lead-bronze | CuSn10Pb10 (CC495K) EN 1982 | DIN 1716 | CuSn10Pb10-C (CC495K) | CuPb10Sn | Cu 78,0 – 82,0 Pb 8,0 – 11,0 Sn 9,0 – 11,0 Ni 2,0 max. Zn 2,0 max. Sb 0,5 max. |
The high lead component provides excellent dry running properties and gives a lower hardness. The mechanical properties change at an operating temperature above 200°C. Leaded bronze is suitable for bearings with a high surface pressure, is acid resistant and can even be used with water lubrication. |
| Brass | CuZn25Al5Mn4Fe3-C (CC762S) | CuZn25Al5 EN 1982 | DIN 1709 Alloy number CC762S 2.0598 |
CuZn25Al5Mn4Fe3-C, Standard EN 1982, CuZn25Al5, 2.0598 | Cu 60,0 – 67,0 Zn rest Al 3,0 – 7,0 Fe 1,5 – 4,0 Mn 2,5 – 5,0 Ni 3,0 max. |
The most common brass alloy is CuZn25Al5Mn4Fe3 also known as High-tension brass has high mechanical values and good wear resistance. High strength brass, the chemical formula is ZCuZn25Al6Fe3Mn3, mechanical properties are different zinc content, mechanical properties are not the same, pressure processing performance has good plasticity, can withstand cold and hot processing. |
| Phosphor Bronze CuSn8) | CuSn8 (CW453K) EN 12163 | DIN 17662, 17672 | CuSn8 (CW453K) DIN 17662, 17672 Alloy number CW453K 2.1030 |
Cu rest Sn 7,5 – 8,5 P 0,01 – 0,4 Fe 0,1 max. Ni 0,2 max. Pb 0,02 max. Zn 0,2 max. |
Phosphorbronze (CuSn6 and CuSn8) are characterized by their purity of the alloy with the addition of phosphor. Specific characteristics of phosphor bronzes are: Very high wear resistance Very high loads Corrosion and seawater proof Good heat conductivity Suitable for applications operating at high temperatures. All rights to the listed content are reserved by https://www.viiplus.com/ |
Browse Bronze Bearing availability, Thrust Washers – Maintenance-free, Made of Bronze
Bronze bearings are made from a variety of bronze alloys, each tailored for different applications based on their mechanical properties and corrosion resistance. Here’s an overview of some common bronze bearing alloys:
