twist drill

American  

noun

Machinery.

1. a drill with one or more deep helical grooves in the body.

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twist drill British  

noun

1. a drill bit having two helical grooves running from the point along the shank to clear swarf and cuttings

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Etymology

Origin of twist drill

First recorded in 1870–75

Example Sentences

See Examples For:

twist drill

The tools of industry expanded to include such useful items as the twist drill and ratchet wrench.

From Slate ● May 29, 2014

In the smaller sizes of twist drill, the stem or shank is made parallel, as in Fig.

From Modern Machine-Shop Practice, Volumes I and II by Rose, Joshua

Instead of using an ordinary twist drill, a special hollow drill may be obtained from the Universal Battery Co.

From The Automobile Storage Battery Its Care And Repair by Witte, Otto A.

These reamers are held while in use in a socket inserted in the tailstock spindle, as when using a twist drill.

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 Jones, Franklin D.

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 Rose, Joshua