**Author details**

Juan R. Laguna-Camacho\* *Universidad Veracruzana, Faculty of Electric and Mechanical Engineering, Poza Rica de Hidalgo, Veracruz, México* 

M. Vite-Torres and E.A. Gallardo-Hernández *2SEPI, ESIME, IPN, Unidad Profesional "Adolfo López Mateos" Tribology Group, Mechanical Engineering Department, México, D.F.* 

E.E. Vera-Cárdenas *Universidad Politécnica de Pachuca, Pachuca, México* 
