In the doctoral thesis “The optimization of the automated assembly process of fixed threaded joints” the nutdriver’s electric power consumption studies depending on the corresponding fixed threaded joint’s assembly time are made. In the theoretical part the conditions of screwdriver’s choice for threaded joints’ acquisition and the theoretical calculation of necessary parameters for optimization were described. In the practical part the experiment was made on the basis of which it is possible to optimize the consumption of electric power taking into account the time of automated assembly process of fixed threaded joints. The calculations show that it is possible to find the optimal working conditions for nutdriver in order to prolong its lifetime, reduce the consumption of electric power and increase the quality of threaded joint. Found the opportunity for additional electric power reduction, when assembling fixed threaded joints, disconnecting power at the moment when the setting torque is reached. The proposed equipment with measurement instrumentation complex can be used in electric power consumption studies which is one of the main tasks of automated production, thus directly affecting the production costs. The doctor’s dissertation is written in Latvian language. The dissertation consists of 72 pages, 37 drawings, 20 tables. 31 literature sources were studied.