Vibrations are one of the important monitored parameters, which allow acquiring primary information about the operating condition of the device. It is necessary to bear in mind that vibrations of rotating machines are closely linked to the dynamic stress of the parts like bearings or transmissions. The paper is dealing with the issue of monitoring and diagnosing the size of the two based parameters of vibrations, namely speed and vibration acceleration. The experimental section presents the results of the measurement. During the processing, we have measured the size of vibration at four places and the processing was done under varying spindle rotation speed. The conclusion presents recommendations for input factors used during measuring and processing. Here you should describe the paper idea in short.