A rubber bearing is defined as a device which permits constrained relative motion between two parts—rotation or linear movement. The fundamental purpose of a bearing is to reduce friction and wear between rotating parts which come in contact with one another in any kind of mechanism. Bearings are classified broadly into categories according to the motions they allow and according to their principle of operation. Each type of bearing is used for different purposes. Bearings are made of various materials but rubber is a widely demanded material for making bearings. Rubber has proved to be an excellent bearing material, especially under circumstances in which abrasives may be present in the lubricant.