Characteristics

Babbitts are antifriction alloys based on lead or tin with low melting point, used for casting between the rubbing parts of moving parts. They are alloyed with antimony, copper, zinc, aluminum and other components. Sliding properties of the alloy are given by a special heterogeneous structure - supporting hard grains are enclosed in a soft tin or lead base. This minimizes friction and wear on the contacting parts, and the rotating parts quickly get used to each other. Lead and tin babbitts of brands: B-88, B-83, B-16, BN are supplied in ingots.

Advantages of

The most popular brand among lead babbitts is B83. It is wear-resistant and relatively inexpensive alloy, reduces wear of rubbing parts and increases the efficiency of equipment. Grade B83 includes in the lead base hard, grains on which the rotating shaft rests. The light-melting base has t° of melting no higher than 320 °C, retains sufficient ductility up to 100 °C. The maximum speed of rotation is 60 m/sec. Maximum load: static - 400 ^kgf/cm2, dynamic - 1000 ^kgf/cm2 sec, impact - 100 ^kgf/cm2 sec. Maximum working temperature - +110°С. Optimal casting thickness ≥ 1 mm.

Mechanical properties B83

Disadvantages

Babbitt alloys are not resistant to shock loads and vibration, which often hampers the operation of moving parts. Low strength allows the use of babbitts only in bearings with a strong housing based on steel or non-ferrous alloys.

Production

Application

At t;° 460 °C the bearings and moving assemblies designed for high speeds under moderate shock loads are poured. These are turbine bearings, crosshead, frame and whorl bearings of low speed diesel engines; propeller shaft support bearings; turbochargers, turbo pumps, compressors ≥ 500 HP. They are bearings of ship and stationary steam engines of power ≥ 500 kw; bearings of large-scale mechanisms, designed for high speeds and loads at t° ≤ 70 °C (and pressure ≤ 20 thousand kPa for quiet load with circumferential speed ≤ 50 m/s; and for shock ≤ 10 thousand kPa-). These are eccentrics of cone crushers of large crushers, bearings of high-speed pinion stands.

Supply

We supply babbitts of any grades at optimum price. The specification reflects the data on the percentage composition and mechanical properties of the products. From us it's easy to buy in bulk any semi-finished products for large-scale production. We provide services to retail buyers. The high level of service, compliance with GOST and international quality standards, responsiveness of service is the face of our company.

Buy at the best price

On the website of Evek GmbH we offer the most up-to-date information on the purchase of rolled products made of light alloys and rare metals. Our best managers, ready to provide highly qualified advice on any current issues. We sell semi-finished products of rare and non-ferrous metals at a competitive price. Products are manufactured on the most modern equipment and meet the requirements of international quality standards. Regular customers are offered a system of discount discounts.