plummer block
/ˈplʌmə ˌblɒk/(also plumber block) Mechanics
noun
A cradle for a journal bearing, consisting of a lower part on which sits the shaft or axle in its bearing, and a cap fitting over this, which holds the shaft or axle in place and can be tightened by means of bolts as the surface of the bearing wears away; a pillow block.
Origin
Late 18th century. From a first element of uncertain origin (perhaps a surname) + block.
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