Abstract: A motor pack for an electrically driven tool includes at least one electric motor and a linearly displaceable member coupled to the electric motor such that the linearly displaceable member is displaced axially by operation of the at least one electric motor. The motor pack further includes a housing enclosing the electric motor and at least partially enclosing the linearly displaceable member. The housing includes a front plate to which a tool head may be removably coupled. The front plate has an aperture formed therein through which the linearly displaceable element can be coupled to a moveable element in the tool head. The motor pack also includes tool control circuitry enclosed within the housing and electrically coupled to the electric motor to control operation thereof.

Abstract: A pivot bearing comprises a shaped bar having an outer circumferential surface provided with two oppositely arranged, longitudinally extending notches, and a sleeve arranged on the shaped bar and having an externally cylindrical surface and an inner circumferential surface facing the outer circumferential surface of the shaped bar and provided with two oppositely arranged longitudinally extending notches. The longitudinally extending notches of the shaped bar are in alignment with the longitudinally extending notches of the sleeve to form two pairs of notches, and cylindrical pins are arranged in the two pairs of notches.