The study objective is to develop the design and technology of manufacturing grooving and cutting tools with internal channels for supplying coolants under high pressure. The design assumes the use of conventional replaceable cutting carbide plates (CCP) offered by many manufacturers. Due to the fact that drilling of narrow channels in the cutter is very problematic, it is proposed to manufacture the front part of the cutter, which secures the replaceable cutting carbide plate, in an additive way. The back of the cutter (holder) can be made by traditional methods. At the same time, the options for fixing the replaceable cutting carbide plates (CCP) are analysed, as well as basing it in the holder and the method of coolant supply. The variants of the design of grooving and cutting tools according to the criterion of treatment features are considered. Special attention is paid to the design of cutters for the surface treatment of narrow deep grooves. The novelty of the work is in carrying out research related to the development of a new design of cutting tools with channels for coolant supply and the method of its manufacture. The research method is 3D modeling of the tool and computer analysis of the stress state on the support surface of the tool head. The development of designs of grooving and cutting tools with cooling channels made with the help of additive technologies is currently not described in the scientific literature. Study result: 3D models, drawings of tools for cutting radial and axial grooves and tools for cutting the edges are obtained. Studies of the stressed state of the support surfaces for CCP are carried out. Prototypes of the corresponding three types of cutters are made. Conclusions: the conducted research proves the prospects of using the method. Thanks to the use of the developed tool, it is possible to increase the productivity of machining parts made of hard-to-machine material, including titanium alloys and heat-resistant steels. As a result, the task of creating a domestic cutting tool that surpasses imported analogues in its properties can be solved.