Sleeve bearings, bushings, collars, housings, and carriages are all important components in many machines and devices. They help to ensure the smooth and efficient operation of these machines and devices. Here are some details about sleeve bearings, bushings, collars, housings, and carriages: Sleeve bearings are typically used in applications where there is a low amount of load and speed. Bushings are typically used in applications where there is a high amount of load and speed. Collars are typically used in applications where there is a need to prevent shafts or other rotating parts from moving axially. Housings are typically used in applications where there is a need to protect bearings and other rotating parts from dirt, moisture, and other contaminants. Carriages are typically used in applications where there is a need to support and move heavy loads.