Babbitt (alloy)

Babbitt metalBabbittBabbitt (metal)bearing metalbabbitBabbitt bearingpoured main bearingsrebabbittingwhitemetal bearing
Babbitt metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.wikipedia
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Plain bearing

journal bearingbushingbushings
Babbitt metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.
Industrial integral bearings are usually made from cast iron or babbitt and a hardened steel shaft is used in the bearing.

Isaac Babbitt

The original Babbitt alloy was invented in 1839 by Isaac Babbitt in Taunton, Massachusetts, United States.
Isaac Babbitt (July 26, 1799 in Taunton, Massachusetts – May 26, 1862 in Somerville, Massachusetts) was an American inventor; in 1839 he invented a bearing made of a low-friction tin-based metal alloy, Babbitt metal, that is used extensively in engine bearings today.

Bearing surface

Babbitt metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.

Bearing (mechanical)

bearingbearingswheel bearing
Babbitt metal is soft and easily damaged, which suggests that it might be unsuitable for a bearing surface.
It may be nothing more than the bearing surface of a hole with a shaft passing through it, or of a planar surface that bears another (in these cases, not a discrete device); or it may be a layer of bearing metal either fused to the substrate (semi-discrete) or in the form of a separable sleeve (discrete).

White metal

tin-lead
It is preferred over the term "white metal", because the latter term may refer to various bearing alloys, lead- or tin-based alloys, or zinc die-casting metal.
Tin-lead and tin-copper alloys such as Babbitt metal have a low melting point, which is ideal for use as solder, but these alloys also have ideal characteristics for plain bearings.

Metal matrix composite

composite(FRM)(matrix) material
However, its structure is made up of small hard crystals dispersed in a softer metal, which makes it a metal matrix composite.

Tin

SnGray tintinfoil
Pewter is 85–99% tin; bearing metal has a high percentage of tin as well.

Antimony

Sbantimonialantimonium
It is used in antifriction alloys (such as Babbitt metal), in bullets and lead shot, electrical cable sheathing, type metal (for example, for linotype printing machines ), solder (some "lead-free" solders contain 5% Sb), in pewter, and in hardening alloys with low tin content in the manufacturing of organ pipes.

Alloy

alloysmetal alloyalloying
Babbitt metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.

Taunton, Massachusetts

TauntonTaunton, MATaunton Fire Department
The original Babbitt alloy was invented in 1839 by Isaac Babbitt in Taunton, Massachusetts, United States.

Massachusetts

MACommonwealth of MassachusettsMass.
The original Babbitt alloy was invented in 1839 by Isaac Babbitt in Taunton, Massachusetts, United States.

Trade secret

trade secretsproprietarysecret
He disclosed one of his alloy recipes but kept others as trade secrets.

Eponym

eponymousself-titledeponyms
Like other terms whose eponymous origin is long since deemphasized (such as diesel engine or eustachian tube), the term babbitt metal is frequently styled in lowercase.

Casting (metalworking)

castingcastmetal casting
Babbitt metal is most commonly used as a thin surface layer in a complex, multi-metal structure, but its original use was as a cast-in-place bulk bearing material.

In situ

in-situsituin place
Babbitt metal is most commonly used as a thin surface layer in a complex, multi-metal structure, but its original use was as a cast-in-place bulk bearing material.

Galling

gallgalled
Babbitt metal is characterized by its resistance to galling.

Crystal

crystallinecrystalscrystalline solid
However, its structure is made up of small hard crystals dispersed in a softer metal, which makes it a metal matrix composite.

Cast iron

cast-ironcastiron
In the traditional style of a babbitt metal bearing, a cast iron pillow block is assembled as a loose fit around the shaft, with the shaft in approximately its final position.

Pillow block bearing

Pillow blockpillow blocksPlummer block
In the traditional style of a babbitt metal bearing, a cast iron pillow block is assembled as a loose fit around the shaft, with the shaft in approximately its final position.

Key (engineering)

keyKeyskeyway
The inner face of the cast iron pillow block is often drilled to form a key to locate the bearing metal as it is cast into place.

Soot

black smokecharcoal blackcarbon black
The shaft is coated with soot as a release agent, the ends of the bearing are packed with clay, and molten metal poured into the cavity around the shaft, initially half filling the pillow block.

Release agent

mold release agentmold release agents
The shaft is coated with soot as a release agent, the ends of the bearing are packed with clay, and molten metal poured into the cavity around the shaft, initially half filling the pillow block.

Clay

claysblue clayammonia-rich clays
The shaft is coated with soot as a release agent, the ends of the bearing are packed with clay, and molten metal poured into the cavity around the shaft, initially half filling the pillow block.

Hardness

hardhardersoft
Hardened babbitt metal is soft enough to be cut with a knife or sharp chisel.

Knife

knivesfish knifeanio
Hardened babbitt metal is soft enough to be cut with a knife or sharp chisel.