Gunmetal Bronze Bushes, Graphite Impregnated Flange Bronze, LG2, LG1, PB, and International Standards, C90500, C90700, C91100, HTB1
High-Performance Leaded Bronze Bushings for Industrial Use
Custom Bronze Gunmetal Bush
Gunmetal Bushes – Sleeve & Flange for Heavy-Duty Applications
Durable, Precision-Engineered Gunmetal Bearings
High-Quality Gunmetal Bushes (CuSn7Zn4Pb7) for Marine, Automotive & Engineering
Gunmetal is another copper alloy that consists of copper, tin, and sometimes small amounts of zinc. It is known for its corrosion resistance and ease of machining. Gunmetal Bearings or Sleeves are one of those workhorse parts that quietly do their job —reducing friction, absorbing loads, and extending the life of shafts and moving parts. Gunmetal bushes are often used in marine and industrial applications, especially in environments where corrosion is a concern. They are valued for their resistance to seawater and various chemicals. These bushes are suitable for applications where moderate to heavy loads and moderate speeds are involved.
Gunmetal bushes are suitable for different purposes based on their specific properties. When selecting the right material for your application, it’s essential to consider factors such as load, speed, environmental conditions, and the level of lubrication available. Consulting with an engineer or materials specialist can help you make the best choice for your specific needs.
Graphite Impregnated Gunmetal Bushes – Sleeve & Flange
Plain & Self-lubricating Bushes
Self-lubricating gunmetal bushes engineered for high-load, low-maintenance performance
Flanged Plain Sleeve Bushing
Durable sleeve and flange bushes with embedded graphite for continuous lubrication
Graphite impregnated gunmetal bushes—available in both sleeve and flange types—are designed to deliver reliable, long-lasting performance in applications where conventional lubrication may not be feasible. These bushes combine the proven strength of leaded tin bronze (commonly referred to as gunmetal) with embedded graphite plugs that provide continuous lubrication, even under high-load or low-speed conditions.
Why Choose Graphite Plugged Gunmetal Bushes?
- Built-In Lubrication: The graphite plugs act as solid lubricants, reducing the need for external greasing—ideal for applications with hard-to-access areas.
- Excellent Load Bearing: The base material, a leaded tin bronze alloy, offers excellent load capacity, wear resistance, and thermal conductivity.
- Low Maintenance: Designed to operate under challenging conditions, these bushes help cut down on downtime and maintenance costs.
- Versatile Fit: Whether you need sleeve-style or flanged configurations, these components can be customized to match your dimensional and functional requirements.
Where They Work Best?
These bushes are widely used in:
- Hydraulic machinery
- Automotive components
- Construction and mining equipment
- Marine and offshore systems
- Textile and processing machines
Their durability and self-lubricating capability make them a go-to solution for environments with heavy loads, dusty conditions, or limited access to regular servicing.
Trusted Material Standards
Every bush is crafted using continuously cast CuSn7Zn4Pb7 (also known as Rg7 or CC493K), aligning with IS:318 and BS:1400 standards. This ensures not just performance, but also material consistency and industry compliance.
Precision & Performance: CuSn7Zn4Pb7 Continuously Cast Bronze Bushings
CuSn7Zn4Pb7 is a high-performance grade of continuously cast bronze, engineered for demanding industrial applications. Comprising approximately 7% tin, 4% zinc, and 7% lead, this alloy offers a balanced combination of strength, wear resistance, and excellent machinability. The presence of lead enhances self-lubricating properties, reducing friction in high-load and slow-speed environments, while tin provides superior corrosion resistance and mechanical strength. This material grade is widely used in the manufacturing of bushings, bearings, and wear plates in sectors such as heavy machinery, construction equipment, and automotive systems. Continuously cast bronze ensures a dense, uniform structure free from porosity, offering improved reliability and longer service life. Whether for sleeve or flange-type bushings, CuSn7Zn4Pb7 delivers dependable performance under varied operating conditions.
Leaded Tin Bronze, commonly referred to as LTB, is designed to meet various mechanical and structural requirements. Its composition generally consists of copper, tin, and lead, which together provide strength, ease of machining, and durability against wear and corrosion—qualities that are perfect for parts that endure significant mechanical stress.
Exploring Gunmetal Grades: LTB1 to LTB6 for Precision Brass Bearing Bushings
Gunmetal, a robust Copper-Tin-Zinc cast alloy, is renowned for its strength, corrosion resistance, and exceptional machinability—making it ideal for precision brass bearing bushings. These alloys are categorized into grades such as LTB1 through LTB6, each engineered to suit specific industrial demands. LTB1 and LTB2 offer high wear resistance and are typically used in general engineering applications. LTB3 and LTB4 provide enhanced load-bearing capacity, perfect for marine and pump components. LTB5 and LTB6 are known for their superior pressure tightness and resistance to dezincification, making them ideal for hydraulic systems and high-pressure environments. Each grade is precisely cast to ensure consistent performance, longer service life, and optimal fit. These gunmetal grades support diverse use cases—from slow-speed bearings to heavy-load bushings—offering reliability across industries.
Industrial Applications of Graphite Impregnated Bronze & Gunmetal Bushings
Graphite impregnated bronze bushings and gunmetal bushes are widely preferred in various industries for their self-lubricating properties, durability, and low-maintenance operation. Below are key applications based on real-world search trends and industrial demand:
- Automotive Industry: Ideal for suspension systems, steering components, and transmission parts due to high load capacity and wear resistance.
- Hydropower Plants: Used in turbine guide vanes and water-lubricated systems for long-term, maintenance-free performance.
- Construction Machinery: Applied in loaders, excavators, and cranes where frequent lubrication is not feasible.
- Textile & Packaging Machines: Suitable for high-speed, low-friction operations with minimal downtime.
- Marine Equipment: Excellent corrosion resistance makes them perfect for ship propeller shafts and deck machinery.
- Steel & Rolling Mills: Performs under extreme temperature and heavy loads.
- Oil & Gas Sector: Used in drilling rigs and valve systems exposed to harsh conditions.
Advantages of Gunmetal Bushes
- Excellent Wear Resistance: Gunmetal bushes are known for their ability to withstand friction and wear, making them ideal for high-load, low-speed applications.
- Corrosion Resistance: The copper-tin-zinc composition offers strong resistance to corrosion, especially in marine, chemical, and moist environments.
- Superior Machinability: Gunmetal is easy to machine with precision, allowing for tight tolerances and custom-designed bushings for specific requirements.
- Self-Lubricating Properties: With the addition of lead in certain grades, gunmetal bushes offer natural lubrication, reducing maintenance and improving lifespan.
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Simply upload your technical drawing or send it via email with details about the product you need, including the preferred material and production process. Our team will review your specifications and provide a tailored, accurate quote—usually within a few hours.
Once you’re happy with the quote, placing an order is quick and easy. Just confirm the details, and we’ll guide you through the rest. We’ll ensure everything matches your drawing before we begin production.
We understand time matters. As soon as your order is finalized, our team gets to work to deliver your product on time. With a streamlined process and strong logistics support, we make sure your parts reach you fast—without compromising on quality.