twist drill
Americannoun
noun
Etymology
Origin of twist drill
First recorded in 1870–75
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The tools of industry expanded to include such useful items as the twist drill and ratchet wrench.
From Slate ● May 29, 2014
It is found that 120 to 130 such holes can be drilled before it is advisable to resharpen the twist drill.
From Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
One method of drilling in the lathe is to insert an ordinary twist drill in a holder or socket S, Fig.
From Turning and Boring A specialized treatise for machinists, students in the industrial and engineering schools, and apprentices, on turning and boring methods, etc. by Franklin D. Jones
The speed of the drill must be as slow again as for the ordinary flat drill, and not more than one-third as fast as the twist drill.
From Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
A similar twist drill, 29⁄32nds inch in diameter, drilled a hard steel rail 13⁄16ths inch deep in 1 minute, and another in 1 minute 10 seconds.
From Modern Machine-Shop Practice, Volumes I and II by Joshua Rose
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