Research on the influence of a new tap drill geometry on C45, 42CrMo4 and X5CrNi8 steel processingAdrian Sorin Faur, Marcel Sabin Popa, Bogdan Cornel Luca, Ioan-Doru Voina and Dan BizubacMATEC Web Conf., 178 (2018) 01002DOI: https://doi.org/10.1051/matecconf/201817801002