Государственное высшее учебное заведение "НАЦИОНАЛЬНЫЙ ГОРНЫЙ УНИВЕРСИТЕТ"
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A boring head has a body with legs placed at its side surface, there rock-destructive elements are fixed. To increase term of operation of the boring head for the rock-destructive elements are arranged as chains and pairs of the outer and inner discs rotatably fixed in legs, and connected, respectively, by means of toothed chains as main destructive elements of the head into integrated kinematical system.