the.com/babbitt

A soft metal that survives by sacrificing itself, like a martyr for your engine.

means A soft alloy, typically of tin, copper, and antimony, used to line bearings so that it wears down instead of the harder shaft running against it.

from Named for Isaac Babbitt, the American inventor who patented this bearing metal in the 1830s. (Not to be confused with the other Babbitt — the conformist title character of Sinclair Lewis's 1922 novel — though both share the same family name.)

the alloy
Tin, antimony, and copper, invented 1839 by Isaac Babbitt
self-sacrifice
Wears away to protect the harder shaft it cradles
the novel
Sinclair Lewis named a 1922 book after spineless conformity
medal earned
That book helped win Lewis the Nobel Prize
for instance

sinclair lewis novel — 1922 satirical novel about george f. babbitt, a real estate broker in a fictional midwestern city

babbitt metal bearing — isaac babbitt invented the tin-based alloy in 1839 for machine bearings, still used industrially today

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