Abstract: For a device for fracture separating bearing covers of aligned bearing bores in bearing arrangements of a machine member, which comprises a guided separating element which is profiled in an approximately semicircular shape and acts in the center onto a bearing cover in the bearing bore, for obtaining a device which is structurally simple, it is suggested that, for the fracture separating, a half-mandrel or full mandrel, which can be axially arranged in one or several bearing bores, is provided. An operating linkage, which only causes the guiding of the respective mandrel in the fracture separating direction, is applied to the respective mandrel transversely to its longitudinal course, the respective mandrel being held in a rotationally secured manner and each bearing cover being rotationally secured while being clamped against the respective mandrel.