A bearing sleeve, often referred to simply as a sleeve bearing, is a cylindrical component used to provide support and reduce friction between rotating shafts and stationary parts in various mechanical systems. These bearings are designed to fit around the shaft, acting as a sliding surface to facilitate smooth rotation. Typically made from materials such as bronze, brass, or composite materials like PTFE (polytetrafluoroethylene), bearing sleeves offer excellent durability and resistance to wear. They are commonly found in applications where low-speed, low-load operation is required, such as in electric motors, pumps, and automotive components. The design simplicity and cost-effectiveness of bearing sleeves make them a popular choice for many industrial and commercial applications.

