Sleeve bearings, also known as plain bearings, are simple mechanical components that support rotating shafts. They consist of a cylindrical sleeve that fits around the shaft, allowing it to rotate smoothly with minimal friction. These bearings are often made from materials like bronze, plastic, or steel and are commonly used in various applications, including motors and pumps. One of the main advantages of sleeve bearings is their ability to handle heavy loads and provide a quiet operation. They require lubrication to reduce wear and tear, which can be provided by oil or grease. Sleeve bearings are often preferred in situations where space is limited or where low maintenance is desired.