Pillow block bearings are used in low-torque, light-load applications and consist of a mounting bracket (pillow block) that houses a bearing.
The pillow block is bolted to a base, locking it, while the shaft and inner ring of the bearing are free to rotate in this configuration.
Pillow blocks are split or unsplit and are usually made of gray cast iron.
The housing factor or cap can be separated from the base with split pillow blocks.
One solid piece makes up an unsplit pillow block.
While the terms pillow block bearing and plumber block bearing are often used interchangeably, they are two distinct devices.
Both blocks have mounting holes on the bottom that enable them to be attached to a surface.
Plumber block bearings vary in that they have an inner bearing and are built for higher loads and corrosive conditions.