The manufacturing plants have carried out efforts towards a greater environmental commitment. Many variables involve in the manufacturing processes, as the machining, and for this reason to know the contribution of these variables can contribute to get better practices. The present work exposes an index of integrated sustainability for the evaluation of the machining operations, in particular in the drilling. This index considers energy aspects of the process, as well as the surface quality of the part and the life of the cutting tool, and allow the optimization through of an interaction algorithm, based on the process cut-off parameters. The theoretical development has been contrasted with experimental data. The cutting parameters obtained from the sustainability index, does not correspond to the most economic option or the fastest, but allows that all the variables of the study simultaneously (roughness, time, cost, tool life and energy) obtain a better commitment.