Sliding Bearing Design

A bearing is a machine element which support another moving machine element (known as journal). It permits a relative motion between the contact surfaces of the members, while carrying the load. A little consideration will show that due to the relative motion between the contact surfaces, a certain amount of power is wasted in overcoming frictional resistance and if the rubbing surfaces are in direct contact, there will be rapid wear. In order to reduce frictional resistance and wear and in some cases to carry away the heat generated, a layer of fluid (known as lubricant) may be provided. The lubricant used to separate the journal and bearing is usually a mineral oil refined from petroleum, but vegetable oils, silicon oils, greases etc., may be used.
The Bearings can be classified in many ways,Depending upon
The direction of load to be supported. The bearings under this group are classified as:
classified as: (a) Radial bearings, and (b) Thrust bearings. In radial bearings, the load acts perpendicular to the direction of motion of the moving element.
Depending upon the nature of contact. The bearings under this group are classified as : (a) Sliding contact bearings, and (b) Rolling contact bearings.