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Two methods of making holes in metal. Drifting is done with punches and preserves all original metal. (Start with a pointed punch and keep widening the hole.) Drilling is done with twist steel bits and removes all metal. Drifting has the additional benefit of allowing for square or polygon-shaped holes whereas drilling allows only for a round hole. A drifted hole is preferable for all blacksmith work although the smith must compensate for the metal "running. ...
출처: www.appaltree.net/aba/terms.htm
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| drill |
to bore or drive a hole in some object
출처: www.chenzhonghua.com/Articles/chen_taiji_glossary....
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| drilling |
Making a hole in a workpiece where none previously exsisted. Drilling may be performed on either a lathe or a drilling machine.
출처: www.physics.harvard.edu/machineshop/machineshopter...
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Holes for three ring binding are drilled, rather than punched. The standard hole punch used in most offices can only punch a few sheets at a time. However, a specialized drilling machine performs the same function on up to 1000 sheets in a single pass.
출처: www.graphiconcepts.com/pages/glossary.html
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| drilling |
The act of boring a hole (1) to determine whether minerals are present in commercially recoverable quantities and (2) to accomplish production of the minerals (including drilling to inject fluids). Exploratory. Drilling to locate probable mineral deposits or to establish the nature of geological structures; such wells may not be capable of production if minerals are discovered.
출처: www.noresco.com/site/content/info_glossary.asp
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