Abstract: Disclosed is a power tool including a control device and at least one electromechanical interface device for connecting at least one rechargeable battery to the machine tool and supplying the power tool with voltage from the rechargeable battery. The interface device includes at least a first terminal and a second terminal and can be set to at least one first position and to a second position; the first terminal can be used for supplying the power tool with voltage from the first rechargeable battery when the interface device is in the first position, and the second terminal can be used for supplying the power tool with voltage from the second rechargeable battery when the interface device is in the second position.

Abstract: An adapter member for connecting a self-drilling rock anchor (1; 31; 69) with a chuck (6) of a drilling tool, includes a sleeve-shaped section (17; 37) having a bottom (20; 40; 60; 80) provided at an end (19; 39) of the sleeve-shaped section (17; 37) for forming a receiving space (21) for connection with an end (4; 34) of the rock anchor (1; 31; 69), and a seal (23; 43; 63; 83) arranged in a region of the bottom (20; 40; 60; 80) and extending from the receiving space (21) to at least a plane (E1; E2; E3; E4) defined by the bottom.

Abstract: In a two-component system for a hardenable material, quartz grains (1) serve as a filler material and are coated with benzoyl peroxide which forms the hardener component of the system. The benzoyl-peroxide coated quartz grains are enclosed in a protective layer of pyrogenic silicic acid. As a result, the flotation capability of the quartz granules is maintained.