The dynamic theory of interacting of a roller bit with borehole bottom at boring which one mathematical finger mirrors the real, difficult processes of interacting of the straight bit with borehole bottom, allows on a design stage of roller bits, with mathematical fidelity to count technical-and-economic indexes of boring and fabrication of roller bits.
   
   Methods of "cuts and tries", and every possible statistical, stochastic model have left irrevocably at mining of more effective constructions of a cone drilling tool.
   
   Has come it is time exact mathematical calculation of the roller bits intended for boring of any on a rock hardness, analogously to calculations of electric networks, thanks to the electricity theory, for example, Ohm's law.
   
   That would be, if electric networks of electrical installations paid off a method of "cuts and tries" not fathoming, for example, to the Ohm's law theory, for example, the current in an electric network is equal to voltage disjointed on resistance of a circuit. Voltage 220 in, resistance of a circuit - 110 ohm. The strength of current compounds 220:110 = 2 amperes. All!!! Any variance peculiar to any probability, statistical systems.
   
   Practical result of the constructed dynamic theory of interacting of a roller bit with borehole bottom, is creation of the cone drilling tool ensuring while drilling superbreaking down of rock at well boring for an oil recovery, gas, blast holes, and which one is advocated by the patent of the USA for № 7-195-086 from March, 27th, 2007 and international patents РСТ on the countries and continents.
   
   At boring by a roller bit with (overbreak) superbreaking down, technical-and-economic indexes essentially raise at boring, that is velocity boring (m/min), a penetration and durability (hour) is simultaneously augmented, at reduction in price of fabrication of a roller bit, at the expense of saving of hard-alloy armament of milling cutters.