Babbit tin

General characteristics of

Antifriction alloy based on lead or tin, low melting point, used to fill between the friction parts of the mobile nodes, invented by the American Isaac Babbitt in 1839 Distinguish 3 groups of alloys.

• tin B88, B83, B83S (consisting of Sn, Sb, Cu) was developed by I. Babbitt
• lead B16, bn, BSB (consisting of Pb, Sn, Sb, Cu)
• calcium BKA, BK2, BK2SH (consisting of Pb, Ca, Na)

In Eastern Europe the most popular the first two groups of. The composition of tin babbit according to GOST 1320−74 includes up to 90% Sn, up to 6% si and up to 9% Sb. The second group of lead-based standardized GOST 1209−90.

Dignity

Babbit is a very plastic at normal temperature, have t° melting point is not higher than 440 °C. they Have an extremely low coefficient of friction They are remarkably reduces the wear of moving parts, increase the efficiency of the equipment. Performance sliding bearings is determined by the thickness of the babbit layer on a steel liner. Babbit combine high ductility. With their help, accelerated pererabatyvaemogo to the surfaces in contact; they are able to retain lubricants, while firm enough to serve as a support shaft. This reduces the wear of the shaft. These advantages are achieved due to the special structure of solid grain bonded plastic base. Solid particles are the basis of the working shaft, they can withstand high pressures, and a soft base, provides rapid pererabatyvaemogo the shaft and retain lubricants.

Mechanical quality В83

σ_in the Limit of short-term strength, [MPa]

σ_T — yield for residual strain [MPa]

Disadvantages

Babbitt alloys are not resistant to shock loads and vibration, which often complicates the work of the mobile nodes. Small strength allows you to operate only the babbit in the bearings with a solid housing on the basis of steel or non-ferrous alloys.

The production and use of

Most commonly used babbits of the following composition:

• 9/10 Sn, 1/10 Cu;
• 8/10 Pb, Sb 1/6, 1/20 Sn;
• 89% Sn, 7% Sb, 4% Cu.

To use alloying of Mg, Na, Ni, Ca, Cd, arsenic, tellurium. To improve the sliding alloy is applied to the bearing shells. From tin babbit grades B88, B83, B83S, SAE11, SAE12, ASTM2 high ductility and excellent performance slip. Compared to lead, they are more resistant to corrosion, wear, conduct heat better. Lead babbits (B16, bn, BSB, BKA, BK2, BK2SH, SAE13, SAE14, ASTM7, SAE15, ASTM15) cheaper and more heat-resistant.

Scope

Bearings of rolling mills, compressors, diesel engines, moving parts of heavy machinery, do not experience shock loads. Lead-calcium babbit V. use of motor-axial bearings of locomotives other parts of railway rolling stock.

Supply

Supplied certified fusible alloys at the best price. In the specifications reflected data on the percentage composition and mechanical properties of products. We can easily buy in bulk any semi-finished products for large-scale production. We provide services to retail customers. A high level of service, the product compliance with GOST and international quality standards, efficient service are the face of our company.

Buy at best price

All fusible alloys implemented by the company «Electrocentury-steel» comply with GOST and international quality standards. Supply babbit all makes and solders in the shortest possible time from warehouses located on the territory of Russia and Ukraine. High quality, affordable prices and a wide range of products define the face of our company. Becoming our regular customer, You will be able to rely on the system of discount discount. Cooperation with us will help You to implement any engineering plans. Waiting for Your orders on the website evek.org.