The paper reports on results of technological research on the coating of standard screw taps with TiN layers deposited by means of arc-plasma discharges, which were carried out within a BULAT-type device equipped with three identical metal-plasma sources. Particular attention is paid to morphology of the coated surfaces. Some data about thickness and microhardness of the coating layers, as well as results of laboratory wear tests of the coated tools, are also presented.