thumb|Typical pillow block fitted with [[ball bearing]]
thumb|Steel plummer block with water-resistant seals
200px|thumb|Plummer block with [[whitemetal plain bearing]]
A pillow block bearing (or plummer block) is a mounting used to support a rotating shaft, using a bearing in a housing which is bolted to a foundation with the mounted shaft in a parallel plane to the mounting surface and perpendicular to the center line of the mounting holes, as contrasted with various types of flange blocks or flange units.
Types
Pillow blocks
A pillow block usually refers to a light duty housing, frequently in one piece and often with an integral anti-friction bearing.
Materials
Heavy-duty bearing housings are often made of grey cast iron.
See also
- Bearing surface
- Plain bearing