Boring

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Boring

 

(in Russian, rastachivanie), a mechanical process for machining interior surfaces by boring (cutting) tools in order to increase the diameter of a hole. Boring is done on lathes, boring machines, and other metal-cutting machines. It is possible to machine blind and through holes, both cylindrical and conical, as well as grooves and slots. Boring yields a machining precision of classes 4 or 5 and a surface roughness of classes 2 or 3.


Boring

 

(in Russian, rassverlivanie), mechanical working of an existing hole with a drill in order to increase the diameter. It is done either by machine, using drilling and boring machines, lathes and other metalcutting machines, or by hand, using pneumatic or electric drills. The precision achieved is of the fourth to fifth class, and the surface roughness is of the second to third class.

boring, borehole

A hole drilled in the ground to obtain soil samples for evaluation and to obtain information about the strata.
References in periodicals archive ?
X-ray micro-computed tomography (CT) scanning of the ulna revealed wide, shallow, subsurface cavities created by the merger of numerous borings, but failed to show any individual borings (Higgs et al.
The borings show a consistent hemi-ellipsoidal morphology over a range of sizes (Figs.
Borings in the vertebral processes differed from those seen in the limb bones.
Organization of reports fell into two categories: site-specific HDD reports and per-county reports for the overland borings.
As the borings were completed, an employee was periodically designated to deliver samples back to Goetechnology's laboratory for testing.
Abundant worm borings occur also in brachiopods from the Estonian oil shale (Fig.
In contrast to possible worm borings in shells, Lower Ordovician endolithic microborings of algal, fungal, and sponge origin are well known from northern Poland (Podhalanska 1984), and the Siljan District of Sweden (Hessland 1949; Lindstrom 1979).
However, the supply of borings was limited and the charge amount was reduced to 1000 lb.
Beyond the reduced raw material charge cost, Auburn also realized three unexpected benefits related to the introduction of borings that reduced operating costs.
That pipe would connect at each end with 3-inch solid pipe that stretches below the walkway to the curb, where the city would drill borings.
Performing soil borings in locations as directed by the City.
Continuous sampling on all soil borings for the first 2A' feet below the existing pavement