FIELD: mining industry. SUBSTANCE: invention is related to technology of hole drilling, specifically, to gear regulating axial load on drilling tool in process of drilling. Drilling rig is fitted with electric contact manometer, pneumatic cylinder, amplifier of brake of winch communicating with source of compressed air via electrically controlled pneumatic valve-throttle electrically connected via contact group of electric contact manometer to power supply source. Electric contact manometer is hydraulically connected to indicator of weight of drilling tool. EFFECT: raised productivity thanks to automatic feed of drilling tool into face with maintenance of preset axial load. 1 dwg
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