Scope: This repository contains data provided by vibrations sensor that can be used in designing and testing ML algorithms for general classification problems or more specific one such as predictive maintenance. Source of the data: Data were obtained in the framework of CHIST-ERA SOON project with the aim of testing machine learning predictive maintenance algorithms. Special remarks: Each file name codes how the data was obtained and and implicitly the data label. In experiment were used two electrical motors named m1 and m2, where m1 is the tested motor and m2 is a second motor for obtaining a more complex testing environment (eg. supplemental noise source).