rotary boring

rotary boring

[′rōd·ə·rē ′bȯr·iŋ]
(mechanical engineering)
A system of boring in which rock penetration is achieved by the rotation of the hollow cutting tool.
Mentioned in ?
References in periodicals archive ?
After more than 5 years of work, rotary boring tools can now handle bores as small as 70 mm, and 40 mm bores will be possible in the future.
The spoils handling system is a single right-hand auger and a high torque reversible rotary boring unit is also available.
The Zinner 560 rotary boring system reduces cutting time and gives a 40% reduction in required horsepower over the power needed with conventional drills.