Plain Bearing

A plain bearing is the simplest type of bearing, comprising just a bearing surface and no rolling elements. Therefore the journal (ie the part of the shaft in contact with the bearing) slides over the bearing surface. The simplest example of a plain bearing is a shaft rotating in a hole. A simple linear bearing can be a pair of lat surfaces designed to allow motion. Plain bearings, in general, are the least expensive type of bearing. They are alsa compact and lightweight, and they have a high load-carrying capacity.