CuPb15Sn8 Leaded Bronze Bushings: High-Performance Self-Lubricating Bearings for Industrial Applications

CuPb15Sn8, also known as ZCuPb15Sn8, is a high-lead tin bronze alloy engineered for demanding bearing applications. With a chemical composition of approximately 15% lead (Pb), 8% tin (Sn), and the balance copper (Cu), this alloy delivers superior tribological performance, making it an ideal material for self-lubricating bushings and wear-resistant components in heavy-duty machinery.

Key Properties of CuPb15Sn8 Bushings

• Self-Lubricating Performance:
  The high lead content creates discrete lead globules within the copper matrix, acting as built-in solid lubricants. These reduce friction and wear significantly—even under marginal or boundary lubrication conditions.

• Excellent Wear Resistance:
  CuPb15Sn8 bushings are designed to withstand high surface loads and abrasive environments, ensuring a long operational life.

• Corrosion Resistance:
  The alloy offers good resistance to atmospheric and chemical corrosion, particularly sulfuric acid, making it suitable for harsh industrial and marine environments.

• High Load Capacity:
  Its robust structure enables excellent load-bearing performance, even under dynamic impact and vibration.

• Embeddability & Conformability:
  The soft lead phase allows embedding of dirt particles, while its ductility helps compensate for shaft misalignment—extending component and equipment life.

• Good Machinability:
  CuPb15Sn8 offers ease of machining for tight tolerances and complex geometries, supporting CNC precision manufacturing.

• Thermal Conductivity:
  The copper base ensures efficient heat dissipation, a critical feature for high-speed or high-pressure bearing systems.

Typical Mechanical Properties

• Tensile Strength: ≥ 200 MPa

• Yield Strength: ≥ 90–100 MPa

• Elongation: ≥ 6–8%

• Hardness: 60–65 HB

• Density: ~8.86 g/cm³

Applications of CuPb15Sn8 / ZCuPb15Sn8 Bronze Bushings

Crusher Eccentric & Bottom Shell Bushings

Widely used in cone crushers and gyratory crushers, such as the HP200, CuPb15Sn8 bushings support the eccentric motion of the main shaft. Their self-lubricating property and high-load capacity are essential in high-impact, high-wear mining environments.

Heavy Machinery & Cold Rolling Equipment

Used in cold-rolling mills and press machinery where bushings face extreme loads and require excellent anti-friction performance.

Engine Components

Ideal for bi-metallic shaft bearings in internal combustion engines. These bushings handle moderate loads at high sliding velocities—even with inconsistent lubrication.

Pumps, Valves & Marine Bearings

Effective in acid-resistant parts, valves, and marine applications, thanks to their corrosion resistance and anti-seizure performance.

General-Purpose Bearings

Applicable across various industrial sectors where moderate to high loads, wear resistance, and lubrication reliability are needed.

ZCuPb15Sn8 Chemical Composition (GB Standard 1176)

International Equivalents:

• C93800 (ASTM B505)

• LBC4 (JIS H5115)

• G-CuPb15Sn (DIN 1716)

Why Choose CuPb15Sn8 from BronzeOilless.com?

At BronzeOilless.com, we specialize in the production of precision-machined CuPb15Sn8 bushings using advanced casting and CNC machining processes. Whether you need custom crusher components, engine bushings, or acid-resistant bronze parts, our leaded bronze solutions deliver performance, longevity, and value.

Popular Product: CuPb15Sn8 Eccentric Bottom Shell Bushing for Crushers

• Material: CuPb15Sn8 Solid Bronze

• Function: Supports gyrating shaft motion

• Benefits: Self-lubricating, precision fit, long service life under impact and friction

Custom Machined Bushings for Any Industry

✔ Crusher & Mining Equipment
✔ Hydraulic Machinery
✔ Industrial Engines
✔ Marine & Offshore
✔ Paper, Steel, and Cement Plants

Optimize your equipment performance with CuPb15Sn8 leaded bronze bushings from BronzeOilless.com. Contact us today for custom solutions tailored to your industry’s most demanding challenges.