FIELD: technological processes.
SUBSTANCE: invention relates to materials drilling and can be used for non-impact or impact drilling of reinforced concrete or other reinforced materials. Drill crown comprises shank, drilling sleeve having bottom and shell, and, at least, two teeth arranged on shell free annular end face, each tooth projects in supply direction above drilling sleeve shell end face. At that, on drilling sleeve shell end face before each tooth in direction of rotation baffle plate is arranged, intended for protection of next tooth front surface facing forward in direction of rotation, against collision with reinforcement rod, available in reinforced concrete or other reinforced material.
EFFECT: providing drilling tool free movement in reinforcement location area.
15 cl, 16 dwg
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