This work is licensed under a Creative Commons Attribution-NonCommercial- NoDerivatives 4.0 International License. This is a postprint version of the following published document: Gómez, M., Castejón, C. & García-Prada, J. (2016). Automatic condition monitoring system for crack detection in rotating machinery. Reliability Engineering & System Safety, vol. 152, pp. 239–247. DOI: 10.1016/j.ress.2016.03.013 © 2016 Elsevier Ltd.