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.
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References in periodicals archive ?
Tenders are invited for ground investigation contract comprising cable percussion boreholes, rotary boring with and without cores, standpipes installed in cable percussion boreholes/rotary cores, cpt testing, trial pits, slit trenches, dynamic sampling (window and windowless sampling), obtaining samples for testing, photography of samples, associated in-situ laboratory testing, ground water level monitoring, preparation of required reports, preparation of ags digital data and performance of the role of pscs, all as specified in the tender documentation.Type of contract: works
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.
site investigation will include: percussion boring and dynamic sampling, rotary boring, pitting and trenching, sampling and monitoring during intrusive investigation, probing and cone penetration testing, geophysical surveying, in situ testing instrumentation, installation monitoring and sampling, geotechnical laboratory testing, and geoenvironmental laboratory testing.
The Zinner 560 rotary boring system reduces cutting time and gives a 40% reduction in required horsepower over the power needed with conventional drills.