The subproject A04 is concerned with the analysis of fluidic overall systems and components in machine tools are investigated. The target of the research activities is the development and validation of calculation models that represent the thermo-energetic behaviour of fluid systems. Based on experiments carried out on an overall system, it is possible to identify the key fluid power components and abstract fundamental statements about their working structure and functionality. The outcomes of these investigations form the basis for the engineering of appropriate calculation models. This paper explains the methodological approach in detail. The initial outcomes of the experimental analysis of a milling centre are introduced. Four essential fluidic subsystems are identified and investigated. The work or motor spindle is regarded as a relevant key component in fluidic tempering systems. The calculation models and simulation results, as well as the experimental studies to validate the models, are introduced specifically for the stator cooling unit of a motor spindle.