FIELD: process engineering.
SUBSTANCE: invention relates to lubrication of rock-drill steel shank. At least portion of fluid is forced to drill bit shank drive hydraulic circuit, or drilling machine drive, or device for pushing of drill bit shank from still tool of drilling machine. Note here that pressurised lubing fluid is circulated back into drill bit shank drive hydraulic circuit, or drilling machine drive, or device for pushing of drill bit shank from still tool of drilling machine.
EFFECT: efficient lubing, no need in additional lubing hardware.
14 cl, 9 dwg
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