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Carbon and graphite products for machinery industry, specific products include: graphite sealing rings, sealing rings, graphite bearings, lubricating columns, graphite blades, mechanical sealing parts impregnated with various metals or resins.
Home Products Machinery Industry / Graphite Bushing
Graphite bushings offer a reliable and often superior alternative to traditional bearing solutions in demanding applications. Their self-lubricating properties, combined with their resistance to extreme temperatures and chemicals, make them a valuable component in a wide range of industries. When selecting graphite bushings, it's essential to carefully consider the operating conditions and choose the appropriate type of graphite to ensure optimal performance and longevity.
Graphite bushings are self-lubricating bearing components made primarily of graphite. They are designed to reduce friction and wear between moving parts in a variety of mechanical applications. Unlike traditional metal bushings, graphite bushings don't require external lubrication, making them ideal for challenging environments and applications where maintenance is difficult or impossible.
Self-Lubricating: This is the defining characteristic. Graphite naturally forms a lubricating film as it wears, reducing friction without the need for grease or oil.
High-Temperature Resistance: Graphite can withstand extremely high temperatures (well over 500°C in non-oxidizing environments) without losing its structural integrity or lubricating properties.
Chemical Resistance: Graphite is inert to many chemicals, acids, and alkalis, making it suitable for corrosive environments.
Low Coefficient of Friction: Graphite's layered structure allows it to shear easily, resulting in a low coefficient of friction against many materials.
Dimensional Stability: Graphite has a low coefficient of thermal expansion, meaning it maintains its shape and dimensions even with temperature changes. This is crucial for maintaining tight tolerances in precision applications.
Lightweight: Compared to many metals, graphite is significantly lighter, which can be beneficial in weight-sensitive applications.
Good Compressive Strength: While relatively brittle, graphite bushings can withstand substantial compressive loads.
Electrical Conductivity: Graphite is an excellent conductor of electricity. This can be an advantage or disadvantage depending on the application.
Graphite bushings are used in a wide range of industries and applications, including:
High-Temperature Furnaces and Ovens: Kiln cars, conveyor systems.
Food Processing Equipment: Ovens, mixers, packaging equipment (where contamination from lubricants is a concern).
Pumps: Submersible pumps, chemical pumps, high-temperature pumps.
Turbines: Steam turbines, gas turbines.
Textile Machinery: High-speed spinning machines, looms.
Automotive Industry: High-performance engines, exhaust systems.
Aerospace: Control surfaces, actuators.
Mining Equipment: Rock crushers, conveyors.
Marine Applications: Rudders, propellers (certain specialized applications).
Natural Graphite: Mined from the earth. The properties can vary depending on the source and grade.
Synthetic Graphite: Manufactured from petroleum coke. Offers more consistent and controllable properties than natural graphite. Can be molded into complex shapes.
Resin-Impregnated Graphite: Graphite that has been impregnated with resins (e.g., phenolic, epoxy) to improve its strength and wear resistance.
Metal-Impregnated Graphite: Graphite that has been impregnated with metals (e.g., copper, bronze) to improve its strength, wear resistance, and thermal conductivity.
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