Babbitt, Isaac

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Babbitt Metals. High lead and tin alloys patented by Isaac Babbitt ki 1839 offer a superior combination of compatibiUty, conformabiUty, and... 

One very important alloy for machine hearings is Babbitt metal, invented by the American Isaac Babbitt (1799-1862). In present-day usage the term is applied to a whole class of silver-white bearing metals or white metals . They are composed primarily of tin, antimony and copper, such as for instance 90% Sn, 6% Sb and 3% Cu. This alloy is used in situations with sliding contact under pressure. Its bearing properties are favored by the fact that hard components of the type CuSn and SbSn are formed and embedded in the soft tin matrix. 

The metal also finds appHcations in other alloys. Cable sheaths are made of lead that contains antimony, and lead shot for ammunition is not made of pure lead but of lead alloyed with 1-8% antimony. The American Isaac Babbitt (1798-1862) invented the bearing alloy named babbitt metal. It is an alloy of copper, antimony and tin, characterized by good antifriction properties, and used as the bearing material for axles and crankshafts. Britannia metal is another tin alloy with about 2% copper and 5-10% antimony. It is a silvery white alloy of tin, similar in appearance to pewter but harder. It is used for the manufacture of tableware. 

Babbitt metal One of a number of alloys originally based on tin, copper, and antimony and now includes lead, ft is used in bearings for motors and was invented by American inventor Isaac Babbitt (1799-1862). 

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