Bearings Bearing refers to any kind of support in direct contact with a moving machine parts. Most of the bearing supports the rotating shafts or spindle. Mainly they are used to minimize the friction, wear and power loss. Types of bearings: 1. Plain or sleeve bearing 2. Antifriction bearing Plain bearing: Plain bearing is a simple cylindrical shape where shaft rotates through the journal area by the separation of a film of lubricating oil. Antifriction bearing: The bearing where various rolling element like steel balls, rollers etc is used called antifriction bearing. Figure: Antifriction bearings (rollers and balls). Bearing selection: Bearing selection depends upon the factors – Ø Power consumption Ø Working life time Ø Types of load caring (axial or radial) Ø Tolerance and fitness Ø Shaft speed (rpm) Ø Ope
