The field of adaptable end-effectors has been under long-term study at the Institute of Production Machines, Systems and Robotics in Brno. The practice has shown that in order to improve the adaptability of industrial robots, it is especially necessary to appply the elements of active robot adaptability. This fact has lead to the development of smart end-effector for screwing assembly operations, which is also able to handle circular components. Within the above-mentioned institute, this problem is in the centre of attention of the Research Centre of Automatic Manipulation in Brno, a detached workplace of the Research Centre of Manufacturing Technology, Czech Technical University in Prague, project supported by the Ministry of Education, Youth and Sports of the Czech Republic. This contribution describes the development of smart end-effectors for assembly operations with application of the system analysis and risk analysis. The result are two smart end-effectors with multi-sensory system and built-in microprocessor that enables. apart from other things, identification of the end-effector, safe communication with the control system, filtration, pre-processing and analysis of the data obtained from sensors. and V názvu článku je překlep - správně je effectors