| 摘要 |
FIELD: food industry.SUBSTANCE: invention relates to rock-breaking tool, specifically a rotary drill bit. Drill disk bit comprises hollow U-shaped housing, fixed in housing axis with spacer pin and mounted on axis of reinforced with rock-destructing inserts discs with hubs made as a spacer pin, with slanted at an equal angle relative to bit axis side surfaces. Bit axis is made with longitudinal and radial channels, and a spacer pin with a longitudinal channel, outlet part is connected to longitudinal channel bit axis, and inlet part - by flushing nozzle to cavity of bit body. Radial channels of bit axis are made in its upper part and directed toward clearances between opposite side surfaces of spacer pin and disk hubs.EFFECT: technical result consists in improvement of mechanical drilling speed by improving cleaning from bottom sludge.1 cl, 1 dwg |
