This diploma thesis deals with the issue of technical diagnostics of individual partsof machines. In the theoretical part of the thesis we deal with maintenance of machines andequipment and we draw our attention to technical diagnostics and its methods.The research part of the thesis deals with the technical diagnostics, namely thevibrational failure of imbalance, thermodiagnostics in terms of the impact of the coat of painton the results of thermodiagnostics and the new possibility of thermodiagnostics. Weconducted the research part of the thesis through an experiment, the results of which wepresent in the form of evaluation.