The book "Anti-friction Bearings and Lubricants Under Electric Current" offers a comprehensive analysis of anti-friction bearings and lubricants under electrical voltage. It is divided into nine chapters that address various aspects such as the phenomenon of threshold voltage, start/stop characteristics, electrical parameters of bearings, capacitive effects, the degradation of lubricants, and the failure of bearings under wave voltages. The theoretical methods for determining capacitance, resistance, capacitive reactance, and impedance are explained in detail, leading to a new methodology for diagnosing bearings. Additionally, the lifespan of bearings and the recovery of resilience under the influence of different voltage levels are examined. The dynamic coefficients of the anti-friction bearings are determined using an electrical analogy approach, and it is assessed how many cycles are needed before craters and waves form on the active surface of the bearings.