FIELD: mining industry; drilling equipment. SUBSTANCE: drill bit is intended for drilling blastholes and boreholes by percussion and rotary-percussion methods. Separator of drill bit presses hard-alloy inserts against supporting surface of bit upper part. Separator is fastened to body by required number of fixing parts such as screws to provide splittable joint. EFFECT: high efficiency. 2 dwg
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|---|---|---|---|
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