Pillow block

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A pillow block is a block that encloses and supports a journal or shaft; a bearing. The block is used for transferring energy at 90 degrees and supports a "transfer shaft" with the use of bearings. The shaft is secured via an "off center" ring, that tightens itself onto the main bearing manifold.

Pillow block bearings are widely used in transmission applications such as mining, quarrying, steel mills, wood mills & crushing machinery. Pillow blocks are also know as "plummer blocks" outside of the US.

Here is a good example of a pillow block: [1]


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