Abstract: A chiseling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational speed of the electric motor corresponds to at least 20 times the striking rate of the striking mechanism.

Abstract: A chiselling hand-held power tool having a tool holder for holding a tool on a working axis, an electric motor, and a striking mechanism. The striking mechanism has an excitation piston coupled to the motor, a striker guided on the working axis and a pneumatic chamber closed by the excitation piston and the striker for coupling a movement of the striker to the excitation piston. The rotational speed of the electric motor corresponds to at least 20 times the striking rate of the striking mechanism.

Abstract: A method for analyzing and/or optimizing technical systems, comprising the following steps: modeling a technical system using a software model, determining for all relevant combinations of functional and/or failed individual components of the technical system, whether an orderly functioning or a failure of the entire technical system exists, the determination being performed automatically using the software model established, determining the individual failure probabilities of the components of the technical system, calculating a total failure probability for the technical system based on the individual failure probabilities of the components of the technical system and on the determined functioning/failure of the entire technical system for the respective functional and/or failed circuit components.