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 ?
mucofloris borings. The bone section was oven-dried at 35 [degrees] C for 1 week and then embedded in resin.
There were no living specimens on the underside of this bone, but there were Osedax borings (Fig.
Observations in the overland borings focused on concerns related to trench excavation and backfill such as depth to bedrock within the excavation zone, groundwater level, soil stratigraphy and corrosion potential.
For the HDD alignments, two borings were typically located on each side of the feature, such as a railroad crossing, highway or river, and were cored into bedrock to an elevation approximately 10 feet below the proposed HDD placement.
The oldest Trypanites borings in shells were previously known from the Middle Ordovician Trentonian Series (Magdefrau 1932; Cameron 1969).
Abundant worm borings occur also in brachiopods from the Estonian oil shale (Fig.
Into each magnet-charged charge car, the foundry returns were placed in the back, the steel scrap in front of the returns and the borings on top of the steel in the front.
With the introduction of borings, the foundry realized an initial cost reduction of $87.80/charge.
It is pertinent to mention here that water boring or water drilling cannot be carried out without obtaining NOC from CDA as the underground water belongs to the state and consumers also must pay aquifer charges to use it.
CDA was facing Rs 820 million deficits owing to the illegal water boring. CDA spokesperson Malik Saleem told 'Reporter' notices have been issued to those who have illegal boring and directed them to get NOC before proper boring.