White metal sliding bearings, Babbitt bushings and oil film bearings to India

Babbitt alloy oil film bearing is a core type of sliding journal bearing widely applied in heavy-duty and high-speed mechanical equipment, featuring a composite structure of hard metal substrate and soft Babbitt alloy lining. The substrate is usually made of steel or bronze to provide structural rigidity and load-bearing stability, while the thin Babbitt lining, mainly tin-based or lead-based alloy, serves as the friction working surface. This unique structural design perfectly combines the mechanical strength of the base material and the excellent anti-friction performance of Babbitt alloy, making it irreplaceable in industrial rotating machinery.

The working principle relies on hydrodynamic oil film lubrication. During equipment operation, the rotating shaft drives lubricating oil to form a continuous, wedge-shaped oil film between the shaft journal and the Babbitt bearing surface. This stable oil film completely separates the two friction pairs, converting dry sliding friction into fluid friction. It effectively reduces friction resistance, lowers operating temperature, and avoids direct metal-to-metal contact and wear. The soft texture of Babbitt alloy enables outstanding conformability and embedability, which can adapt to minor shaft misalignment, assembly errors and tiny surface impurities, preventing shaft scratching and bearing seizure.

Compared with rolling bearings, this bearing boasts superior shock resistance, high load capacity and stable high-speed operation performance. It also features good wear resistance and low noise during long-term continuous operation. Tin-based Babbitt bearings are more suitable for high-speed, high-precision and heavy-load working conditions, while lead-based ones are cost-effective for medium-low speed and impact load scenarios. Widely used in steam turbines, wire-mill gear box, generators, large fans, compressors and mining machinery, it ensures the long-term stable and safe operation of core industrial equipment, remaining a key basic component in modern heavy industry.