A pillow block, also referred to as a Plummer block, is a fundamental component in mechanical systems designed to support and align rotating shafts. Its construction typically consists of a sturdy housing, often made from durable materials like cast iron or steel, along with a bearing insert. This bearing insert, usually a ball or roller bearing, is situated within the housing's cylindrical bore. Together, they facilitate the smooth rotation of a shaft while mitigating friction and ensuring proper alignment. Pillow blocks find extensive use across diverse industries, serving as critical elements in machinery ranging from conveyor systems to agricultural equipment.

