pillow block

noun Machinery.
a cast-iron or steel block for supporting a journal or bearing.

Origin:
1835–45

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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
pillow block
 
n
machinery Also called: plummer block a block that supports a journal bearing

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
The main bearing is a pillow block-mounted, double-row spherical bearing.
Pillow block bearings bolted on the top of these posts support the horizontal
  axis of the goniometer.
Bearings shall be heavy-duty pillow block, self-aligning ball or roller, and
  antifriction type.
Provide shafts with pillow block or flanged self-aligning type bearings.
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