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twist drill (tool) -- Britannica Online Encyclopedia
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twist drill

 tool

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Aspects of this topic are discussed in the following places at Britannica.

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  • drill techniques ( in drill (tool);

    ...determines how large a chip is taken off with each rotation of the drill. The degree of twist of the helical flutes also affects the drill’s cutting and chip-removal properties. For general-purpose twist drills the helix angle is about 32°. The angle formed by the two sides of the tapering point is 118° for standard drills, while for drilling tough metals, a flatter point with a...

    in machine tool: Drilling machines )

    Drilling machines, also called drill presses, cut holes in metal with a twist drill. They also use a variety of other cutting tools to perform the following basic hole-machining operations: (1) reaming, (2) boring, (3) counterboring, (4) countersinking, and (5) tapping internal threads with the use of a tapping attachment.

Citations

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"twist drill." Encyclopædia Britannica. 2009. Encyclopædia Britannica Online. 25 Mar. 2009 <http://www.britannica.com/EBchecked/topic/611155/twist-drill>.

APA Style:

twist drill. (2009). In Encyclopædia Britannica. Retrieved March 25, 2009, from Encyclopædia Britannica Online: http://www.britannica.com/EBchecked/topic/611155/twist-drill

More from Britannica on "twist drill (tool)"...

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twist drill
...determines how large a chip is taken off with each rotation of the drill. The degree of twist of the helical flutes also affects the drill’s cutting and chip-removal properties. For general-purpose twist drills the helix angle is about 32°. The angle formed by the two sides of the tapering point is 118° for standard drills, while for drilling tough metals, a flatter point with a...
For a definition of "twist drill (tool)", visit  Merriam-Webster.

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