Graphite Impregnated Bronze Bushings – Choice Of Substrate Material Materials for Graphite Impregnated Bronze Bushings

Graphite Impregnated Bronze Bushings are a type of self-lubricating bearing that combines the high strength and excellent wear resistance of bronze with the lubricating properties of graphite. These bushings are particularly suited to applications where conventional lubrication is difficult or impractical.

When manufacturing Graphite Impregnated Bronze Bushings, the choice of substrate material (in this case, the type of bronze) is crucial, as different bronze alloys offer different properties. Here are a few common choices:

1. C93200 (Tin Bronze): This alloy is a general-purpose bronze widely used for bushings. It offers a good balance of strength, wear resistance, and machinability.

2. C95400 (Aluminum Bronze): This is the most common aluminum bronze and is known for its high strength and excellent wear resistance. It also resists deformation under high loads.

3. C86300 (Manganese Bronze): This high-strength alloy is used for heavy-duty applications. It offers excellent load capacity and wear resistance but may require more precise machining.

4. C90700 (Tin Bronze): This alloy is often used for heavy-duty gears and high-load bushings. It offers excellent wear resistance and low friction.

5. Cusn8 (Phosphor Bronze): This alloy offers excellent resistance to fatigue, wear, and corrosion, making it a good choice for bushings used in harsh environments.

6. SAE841: Graphite impregnated bronze bushings made from SAE841 material are a type of self-lubricating bearings commonly used in various applications. These bushings are designed to reduce friction and wear in mechanical systems by incorporating graphite into the porous structure of the bronze material.

   The SAE841 material refers to a specific type of bronze alloy, often known as powdered metal bronze or oil-impregnated bronze. It typically consists of copper, tin, and other elements, and is produced through a sintering process. During manufacturing, the bronze powder is mixed with graphite, which serves as a solid lubricant.

When choosing the substrate material for Graphite Impregnated Bronze Bushings, consider the specific requirements of your application, including load capacity, wear resistance, corrosion resistance, and operating environment. Each bronze alloy offers a unique set of properties, so the optimal choice will depend on the performance characteristics you need.

High Force Brass As The Base – Graphite Impregnated Bearing

High-force brass as a base for graphite-impregnated bearings, also known as self-lubricating bronze bushings, has been found to be highly effective due to the inherent properties of the material. This type of brass is noted for its superior hardness and wear resistance, which is twice as high as that of general brass bushings.

The high-force brass provides a sturdy base for the graphite impregnation, ensuring the bearing is tough and durable. The graphite serves as a self-lubricating component, which reduces friction and wear, improving the efficiency and lifespan of the machinery in which it’s used.

These bearings have been widely adopted in various industrial applications. For example, they are used in cure gold continuous casting machines, where they help maintain efficient and stable operation. Their superior wear resistance and self-lubrication properties make them ideally suited to this high-temperature, high-load environment.

Similarly, they have proven their worth in train supports, steel rolling equipment, and mining machinery. In these applications, the high-force brass withstands heavy loads, while the graphite lubrication ensures smooth and efficient movement even at low speeds.

In the maritime industry, these bearings are used in ships, where they perform under high load conditions with excellent reliability. They also find use in gas turbines, where they endure high temperatures and heavy loads while maintaining their structural integrity and functionality.

In conclusion, high-force brass-based, graphite-impregnated bearings offer a superior solution for demanding applications, where high load, high temperature, low speed, and heavy-duty usage conditions are encountered. Their exceptional hardness, wear resistance, and self-lubricating properties ensure efficient operation and a long lifespan, making them a preferred choice in various industries.

Steel And Copper Inlay As The Base

Steel and copper inlay bearings, also known as steel oilless bearings, are highly efficient and cost-effective solutions for various industrial applications. This type of bearing comprises a steel sleeve base into which tin bronze powder is sintered, and then solid lubricant is embedded.

The combination of these materials offers unique advantages. The steel sleeve provides a strong and durable base that enhances the compressive strength of the bearing, while the tin bronze offers inherent lubrication properties. Moreover, the solid lubricant embedded in the structure further reduces friction, ensuring the bearing’s smooth operation.

In terms of cost-effectiveness, the use of a steel base helps reduce costs compared to other materials, while not compromising on functionality. This makes steel oilless bearings a preferred option for various industries looking for a balance between performance and cost.

An additional advantage of these bearings is their flexibility of installation. They can be fitted and used with the substrate by welding, making their integration into machinery straightforward and efficient.

These bearings are especially suitable for fields that cannot be refueled, where constant lubrication is impractical or impossible. For example, in metallurgical machinery, the harsh conditions and high temperatures make regular lubrication challenging. Here, the self-lubricating feature of the steel oilless bearing proves beneficial.

Similarly, in construction machinery, the bearings are often exposed to dust and debris that can interfere with lubrication. The solid lubricant embedded in the bearing ensures its continued operation despite these conditions.

In oil transfer machinery, where exposure to oil could potentially degrade other types of bearings, the steel oilless bearing stands out for its durability and reliability.

In summary, steel and copper inlay bearings provide a robust, self-lubricating solution that offers improved compressive strength and cost-effectiveness. Their versatility of installation and suitability for non-refuelable fields make them a valuable asset in metallurgical machinery, construction machinery, and oil transfer machinery among other applications.

Graphite Embedded Steel bearing

Graphite Embedded Steel Bearings, also known as Hardened Steel Bushings, are robust bearings designed to withstand high-pressure environments. The graphite embedded in the bearing structure serves as a solid lubricant, allowing the bearing to operate smoothly under heavy loads. Here’s a closer look at the properties and applications of these bearings:

1. High-Pressure Resistance: As these bearings are made from hardened steel, they can withstand very high pressures, making them suitable for heavy-duty applications.

2. Self-Lubricating: The graphite embedded in these bearings acts as a solid lubricant. This is beneficial in situations where traditional lubrication methods are impractical or could potentially cause contamination.

3. Prevention of Seizure: The graphite embedded in the bearing is released as lubricating particles under operation, creating a film between the bearing and the shaft. This helps to prevent seizure, a significant advantage over bearings that rely solely on oil lubrication.

4. Ideal for Lifting Machinery: These bearings are particularly well-suited for use in lifting machinery and supportive parts, such as the supports in rolled earth machines and cranes.

However, despite their robust characteristics, there are some environments where these bearings should not be used:

1. Water Exposure: These bearings are not designed to be used in environments with high water exposure. The water can wash away the graphite, reducing the bearing’s lubrication and potentially leading to premature wear and failure.

2. Acid and Alkali Exposure: Graphite embedded steel bearings are also not suitable for use in environments with high acid or alkali exposure. These substances can corrode the steel and degrade the graphite, reducing the bearing’s lifespan and effectiveness.

In conclusion, Graphite Embedded Steel Bearings are a robust and reliable bearing solution for high-pressure environments and heavy-duty applications, provided they are used in suitable conditions. As always, it’s best to consider the specific requirements of your application when selecting a bearing type.

Cast Iron Inlaid Tin Bronze Substrate

Cast iron inlay bearings represent an innovative approach in the realm of solid lubricant embedded bearings, utilizing HT250 cast iron as the base material. This is a typical example of material-saving product design, contributing to cost-effectiveness without compromising on functionality.

The design of these bearings involves embedding solid lubricant into the HT250 cast iron base. This combination takes advantage of the cast iron’s structural robustness and the lubricant’s friction-reducing properties, ensuring the bearing operates efficiently under various conditions.

One of the key advantages of this product is its cost-effectiveness. If the pressure is less than 14.5N/mm2, or if the mechanical performance requirements are not particularly high, tin bronze can be substituted for the substrate in the cast iron inlay bearing. This substitution can significantly reduce costs while still meeting the functional requirements of many applications.

These bearings find use in various fields where the demands on the bearing are within their capabilities. For instance, they are used in mold guide pillars, where they facilitate smooth and precise movement, contributing to the overall accuracy and quality of the manufacturing process.

Similarly, in injection molding machine mold frames, these bearings are able to withstand the pressures and temperatures involved, ensuring the machinery operates smoothly and effectively. Their cost-effectiveness and material-saving design make them particularly attractive in these settings.

Reasons For Selecting Graphite Impregnated Bronze Bushings

1. Total Self-Lubricating:

No oil or grease is required: The self-lubricating features allow bearings to be used where oiling is difficult, expensive to implement, and where grease/oil cannot be used. Excellent lubrication is achieved even under high loads at low speeds.

2. Excellent Wear Resistance:

Excellent wear resistance is achieved under severe working conditions, such as heavy load, low velocity, reciprocating, oscillating, and intermittent motions where the formation of oil film is difficult. Wear resistance: Solid lubricating materials generally have very low shear strength and strong adsorption to the surface of metal substrates. At the beginning of the bearing operation, the solid lubricant undergoes sheer slip and is continuously adsorbed on the exposed metal surface, so that the entire friction interface quickly forms a layer-transfer lubricating film. The formation of the solid lubricating film avoids the direct friction between metal and metal. reduce wear.

3. Low Coefficient of Friction: 0.04 to 0.2 typical:

Self-lubrication with specially embedded solid lubricants reduces friction. The solid lubricating block (or stick) embedded in the substrate generates heat when it is rubbed with the dual material, and the solid lubricant is extruded by thermal expansion, forming a lubricating film, and forming a transfer film on the surface of the dual material to achieve lubrication. The friction occurs inside the lubricant so that it can show good friction characteristics – a low coefficient of friction. Also, the coefficient of friction decreases with increasing load and speed.

4. Wide Operating Temperature Ranges: -415° ° to 1,100° °F

Superior performance is exhibited under high and low-temperature conditions. solid lubricating materials can work in a wide temperature range. The upper limit of use temperature is above 1000℃, and the minimum use temperature is below -150℃. No solid lubricating material has such a wide working range, and the actual circumferential lubricating material only needs to be adapted to a specific temperature range. Corrosion resistance and radiation resistance: Solid inlaid self-lubricating bearings and counterparts can work in acid, broken, salt, mist, water, seawater, and other corrosive liquids or gases. Solid lubricated bearings working in a corrosive medium environment can maintain stable performance and ensure their good lubricating performance within the specified service period. Within the specified period of use, it can withstand a certain amount of radioactive radiation. Its physical and mechanical properties and tribological properties should remain stable.

5. Corrosion and Chemical Resistance:

Performance is not affected by water and caustic chemicals.

6. Designed to Exceed Your Requirements:

High-precision products with close tolerances.

7. Cost Competitive:

Maintenance, replacement, and end-item downtime cost are reduced due to the exceptional service life compared to similar self-lubricating products.

Advantage of Graphite Bronze Bushing

Graphite Bronze Bushings, or Graphite Impregnated Bronze Bushings, offer several advantages that can significantly increase productivity in various industrial applications. Here’s why:

1. High-Strength Metal Matrix: These bushings are made of bronze, a strong and durable material that can withstand high loads and resist wear and tear. This high strength means the bushings will last longer, reducing downtime for replacements and increasing overall productivity.

2. Sufficient Solid Lubricant Content: The bushings are impregnated with graphite, a solid lubricant. This provides consistent lubrication, reducing friction and wear rate, and eliminating the need for regular re-lubrication. This can save time and resources, leading to higher productivity.

3. Good Electrical and Thermal Conductivity: Bronze is a good conductor of electricity and heat, which can be advantageous in certain applications. It can help prevent overheating in high-speed applications and can also be beneficial in applications where electrical conductivity is needed.

4. Low Friction Coefficient & Wear Rate: Thanks to the graphite, these bushings have a low friction coefficient, leading to smoother operation and less wear and tear over time. This can reduce maintenance requirements and extend the lifespan of both the bushing and the associated equipment, further boosting productivity.

5. Wide Range of Sizes: These bushings are available in a wide variety of sizes to suit different applications. This means you can choose the perfect fit for your needs, ensuring optimal performance and longevity.

So, whether you’re involved in the manufacturing, automotive, construction, or any other industry that relies on high-quality bushings, consider Graphite Bronze Bushings. They’re designed to deliver superior performance, enhance productivity, and offer a cost-effective solution for your bearing needs. Please note, to find the most accurate and current information regarding product availability and purchase options, you should contact a reputable supplier or manufacturer directly.

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