Bronze C52100 / CuSn8 Bearing Bushings
Bronze C52100 / CuSn8 Bearing Bushings
High-Performance Self-Lubricating Bronze Bushing Solutions & Technologies. Minimize downtime, extend service life, and reduce costs for dynamic applications.
Overview of Bronze C52100 / CuSn8 Bearing Bushings
Bronze C52100, also known as phosphor bronze alloy UNS C52100 or EN CuSn8 (CW453K), is a high-performance tin bronze material widely used for bearing bushings. This alloy typically contains approximately 91–93% copper, 7–9% tin, and 0.02–0.35% phosphorus, offering an excellent balance of strength, wear resistance, and corrosion protection.
Its ability to form a stable oil film during operation makes it ideal for low-speed, high-load applications where reliability is critical. Bronze C52100 is lead-free, recyclable, and complies with standards such as ASTM B139, DIN 17662 (2.1030), and JIS C5210.
Design and Features
C52100 bushings are commonly manufactured as wrapped (rolled) designs from bronze strips and often feature lubrication pockets such as diamond-shaped grooves or oil holes, covering around 25% of the surface to retain grease and reduce friction.
They can be customized into various forms, including:
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Cylindrical sleeves
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Flanged bushings
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Thrust washers
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Split bushings for easy installation
Key Properties
C52100/CuSn8 phosphor bronze bushings perform exceptionally well in demanding environments due to their material characteristics:
| Property | Typical Value / Description |
|---|---|
| Composition | Cu: 91–93%, Sn: 7–9%, P: 0.02–0.35% (trace elements <0.5%) |
| Density | 8.8–8.9 g/cm³ |
| Hardness (Brinell) | 70–90 HB (annealed), up to 180 HB (cold-worked) |
| Tensile Strength | 300–500 MPa |
| Yield Strength | 150–300 MPa |
| Elongation | 20–50% |
| Thermal Conductivity | 50–60 W/m·K |
| Max Operating Temperature | Up to 250°C (short-term up to 400°C) |
| Wear Resistance | High; suitable for rough conditions at low speeds |
| Corrosion Resistance | Excellent in fresh/salt water, atmospheric, and mildly acidic environments |
| Lubrication | Grease reservoirs enable low-maintenance or self-lubricating operation |
These properties make C52100 bushings ideal for heavy-duty, oscillatory, or linear motion applications without frequent relubrication.
Common Applications
C52100/CuSn8 bushings are widely used in industries where durability under stress is critical:
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Construction & Mining Machinery: Journal bearings, excavator arms, crane components for high radial and axial loads
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Agriculture & Automotive: Tractor chassis, suspension systems, steering linkages
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Machine Tools & Lifting Equipment: Slides, pivots, and gears for precise, low-friction movement
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Electrical: High-load bushings, springs, connectors, pressure components
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Marine & Industrial: Oscillating joints in pumps, valves, and conveyors exposed to corrosive conditions
Performance Note: These bushings perform best at velocities under 2.5 m/s and loads up to 50–100 MPa, depending on lubrication.
Types and Customization
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Wrapped Bronze Bushings (FB092 Style): Thin-walled, economical sleeves with oil grooves for easy installation
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Split / Flanged Bushings: Handle axial loads and non-standard dimensions
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Self-Lubricating Variants: Embedded graphite or lubrication pockets for dry-running in harsh environments
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Sizes: Standard inner diameters from 10–200 mm, outer diameters up to 220 mm, and lengths 10–100 mm; flanges, collars, or non-cylindrical shapes can be customized
Suppliers: Companies like VIIPLUS.com offer bulk or custom solutions, often at competitive prices for OEMs.
If you need specific dimensions, pricing, CAD drawings, or supplier recommendations, providing more details will allow for a tailored response.
Metal Bushing (Lubricated Metal) -Self-Lubricating Bushing Materials
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