Overview of Split Bronze Bushing (CuSn8 Diamond Lubricating Bearing)
Overview of Split Bronze Bushing (CuSn8 Diamond Lubricating Bearing)
High-Performance Self-Lubricating Bronze Bushing Solutions & Technologies. Minimize downtime, extend service life, and reduce costs for dynamic applications.
Overview of Split Bronze Bushing (CuSn8 Diamond Lubricating Bearing)
The split bronze bushing, made from CuSn8 (a phosphor bronze alloy containing approximately 92% copper and 8% tin), is a wrapped or rolled plain bearing specifically designed for high-load, low-speed applications.
Its split design allows easy installation and replacement without disassembling the entire assembly, making it highly suitable for maintenance in heavy machinery. The term “diamond lubricating” refers to the diamond-shaped indents or oil pockets on the inner surface, which serve as reservoirs for grease or oil. These pockets help form a rapid lubricating film at startup, reduce friction during operation, and extend service life through long-term self-lubrication with minimal maintenance.
This bushing is particularly well-suited for construction machinery due to its excellent shock absorption, wear resistance, corrosion resistance, and ability to sustain oscillating or rotational motion under heavy loads. Functioning as an internal support component, it provides a sliding or rotational interface for shafts and pins, ensuring smooth lubrication to prevent metal-to-metal contact.
Standard dimensions vary (e.g., ID 25 mm × OD 28 mm × length 35 mm), but custom sizes are commonly used for specific machinery requirements.
Key Properties and Benefits
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Material: CuSn8P (cold-formed homogeneous bronze) offering high strength and fatigue resistance.
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Lubrication: Diamond-shaped indents retain grease or oil, enabling intermittent or continuous lubrication; requires initial greasing, followed by periodic relubrication.
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Performance: High load capacity (suitable for heavy-duty use), low friction coefficient, temperature resistance up to ~250°C, and reliable operation in dirty or harsh environments.
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Advantages in Construction: Reduces downtime, extends component life, and effectively absorbs vibration and shock from uneven terrain.
Specific Application Positions in Construction Machinery
These bushings serve as inner sliding or pivot supports in various joints, linkages, and articulation points, where proper lubrication is essential for long service life.
They are commonly used in excavators, bulldozers, cranes, wheel loaders, and dump trucks.
| Machinery Type | Specific Application Position | Role and Lubrication Function |
|---|---|---|
| Excavators | Boom pivot pins, arm/dipperstick joints, bucket linkage pins | Supports the rotational motion of the arm and bucket. Diamond pockets retain grease under shock loading, reducing wear on hydraulic pins. |
| Bulldozers | Ripper shank pivots, blade tilt cylinders, track frame connections | Handles high-impact tilting and ripping. Oil reservoirs maintain lubrication even in dusty or dirty environments, preventing seizure during low-speed oscillation. |
| Wheel Loaders | Bucket pivot points, lift arm bushings, steering cylinder mounts | Facilitates lifting and dumping motions. The split design simplifies field replacement, and diamond indents ensure even oil distribution for smooth hydraulic operation. |
| Cranes (Mobile/Truck) | Boom extension sections, outrigger pivot joints, hoist drum bearings | Supports telescopic extensions under heavy loads. Provides corrosion-resistant lubrication, ideal for outdoor or marine-like construction environments. |
| Dump Trucks / Articulated Haulers | Tipping body hinges, suspension pivot bushings, axle kingpins | Enables safe tipping and articulation. Lubrication pockets minimize friction in high-vibration areas, extending maintenance intervals. |
| General (Graders, Backhoes, etc.) | Hydraulic cylinder rod ends, swing bearing supports, undercarriage links | Acts as an inner sleeve for rod-end sliding. Diamond lubrication supports intermittent movement, ideal for variable-speed construction operations. |
In these applications, the bushing is typically press-fitted or clipped into a housing around a shaft or pin, with grease fittings provided for periodic lubrication.
For example, in an excavator boom pivot, it can reduce galling and wear under 10–20 ton loads, achieving over 5,000 hours of service life with proper maintenance.
If you require specific dimensions (e.g., ISO 3547 standards), CAD models, or supplier quotations, please provide detailed specifications.
Metal Bushing (Lubricated Metal) -Self-Lubricating Bushing Materials
Bushings are specialized, self-lubricating metal components widely utilized across various industries due to their durability and low maintenance requirements. Self-lubricating metal bushings are engineered to function without additional lubrication in numerous applications, thereby minimizing maintenance needs. These bushings are available in various series and configurations, such as flanged bushings and split bearings, to meet specific application requirements.
Metal-Polymer Anti-Friction Plain Bearings
Metal-Polymer Composite Self-lubricating Bushing Material
Steel Back + Porous Bronze Sinter + PTFE
