Abstract
This article describes a drilling tool that has been designed in the form of a block of unified pneumatic-percussion mechanisms equipped with rock-breaking elements and placed on a single body with the possibility of free axial movement of the percussion mechanisms in the body of the drilling tool guarantees identical (constant, depending only on air pressure) force of each strike on the face. The power of the drilling tool and the drilling efficiency are determined by the air supply pressure. The rock-breaking elements on the peripheral crown set at an angle to the face maintain the required hole diameter as the components fall constantly on the surface being broken even when they are wearing away. The drill bit is fitted with low wedge-shaped drilling tips with an advancing edge for drilling shallow holes using light mobile drilling units.
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