This book is focussed on the types of bearing that can achieve extreme accuracy of rotation and the properties of most interest to the designers of high precision machinery including: motion error, static stiffness, damping and power consumption. It will review the factors that influence motion error, stiffness and damping in practical applications and will provide the reader with a basic awareness of the parameters that need to be controlled in order to obtain the best bearing performance. Guidance is also given to estimating bearing stiffness, damping and power consumption at the design stage by way of practical and current examples.