This volume is dedicated to the developments of a new generation of mechanical systems that are highly miniaturized and very sophisticated, yet extremely robust. Technological progress creates increasingly arduous conditions for rolling mechanisms. In the twenty-first century, bearings are expected to perform better in the form of various operating conditions, that is from low speed to extremely high speed and from low load to huge load applications. The expectations from the field of bearing technology are great. Contents 1 Comparative Analysis of Bearings for Micro-GT: An Innovative Arrangement 2 Electromagnetic Levitation System for Active Magnetic Bearing Wheels 3 Condition Monitoring and Fault Diagnosis of Roller Element Bearing 4 Design Aspects of the Bearing Supports 5 Bearing Fault Detection in Induction Machine Using Squared Envelope Analysis of Stator Current