Measurement data of the analysis of the electrical impedance of graphite and silver graphite carbon brushes for use in impedance measurement of sensory utilizable machine elements. Time domain and frequency domain measurements. Measurement data consists of impedance data (absolute value, phase angle, real part, imaginary part). Additionally resistance and capacitance for time domain measurements. This research was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation), grant number 431606807.