Repairing Cast Tin-Based Babbitt Alloy Bearing Bush for Subcontract Machining

Production of Babbitt metal, bearing alloys, Babbitt bearing shells, support pads, bushings, and liners. We sincerely look forward to collaborating with you to achieve brilliance together. Below, I will briefly discuss the relevant knowledge of Babbitt bearing shell casting for consumers: 1. Cleaning of alloy bearing shells: Place the bearing shells in a 10%-15% cleaning agent 1 solution to remove rust, then immerse them in hot water at 80 degrees Celsius to eliminate remaining dirt. After washing, place the bearing shells in hot water at 70 degrees Celsius to rinse off any residual contaminants. After cleaning, avoid touching the inner surface of the bearing shells with your hands. Sometimes, due to prolonged storage after removing old alloy, an oxide layer may form on the surface. Before tinning, perform a 3-minute weak corrosion in cleaning agent solution, immediately followed by a 2-minute neutralization in cleaning agent 2 solution, and then rinse with hot water. 2. The adhesion strength of tin to the bearing shell is better than that of Babbitt metal. Timing ensures a stronger bond for the Babbitt alloy. The timing materials used are tin or tin alloys, along with a flux. The flux removes surface oxides and grease, facilitating a firm bond. Timing methods include the wipe method and the dip timing method. 3. Removing contaminants: Use a blowtorch flame or heating furnace to heat the back of the bearing shell to remove old Babbitt metal. Carefully clean the melted Babbitt metal from the bearing shell with a wire brush, eliminating dirt, rust, and traces of Babbitt metal. Pay special attention to cleaning the oil grooves and dovetail slots. After cleaning, timing, and priming, pour the Babbitt alloy solution...

Babbitt metal, a low-melting-point bearing alloy with hard particles distributed in a soft matrix. It comes in three series: tin-based, lead-based, and cadmium-based. The representative composition (by mass fraction) of tin-based Babbitt alloy is: antimony 3%~15%, copper 2%~6%, cadmium <1%, and the remainder tin. Tin-based and lead-based bearing alloys, known for their anti-friction properties, were invented by the American Babbitt and are named after him. Due to their white color, they are also called white metal or乌金 (Wujin).

The solidus temperature of cast tin-based Babbitt alloy ZSnSb11Cu6 is 240°C, and the liquidus temperature is 370°C. Its maximum operating temperature should not exceed 100°C. The coefficient of friction is 0.005 with oil and 0.28 without oil.

Babbitt metal is primarily used in bearing shells, bearings, liners, and bushings for large machinery spindles. Examples include: cement machinery, steel machinery, chemical machinery, paper machinery, petroleum machinery, ship machinery, compression machinery, coal mining machinery, mineral processing equipment, etc. It can also replace brass in large machine tools with excellent results.