The paper deals with torus-shaped autoequalizer with vertical axis, the body of which is placed relatively eccentric to the rotation axis and the internal working walls of which are covered with nanocoatings, which allow providing different values of friction coefficient on the respective inner zones of the body, thus making it possible to adjust the ball’s working modes. Autoequalizer with torus-shaped body contains one ball-shaped adjustment mass moving freely within the autoequalizer’s body both circularly and crosswise. This reduces to the minimum the resistance force during the ball motion mode, and at the same time decreases the possibility to start the autoequalizer. The design of an autoequalizer ensuring working state when at rotation the ball stops relative to the autoequalizer’s body opposite to the imbalance has been experimentally worked out. The autoequalizer design has been protected by patent.