twist drill

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Related to twist drills: Forstner bit, Drill bits

twist drill

[′twist ‚dril]
(design engineering)
A tool having one or more helical grooves, extending from the point to the smooth part of the shank, for ejecting cuttings and admitting a coolant.

twist drill

A drill, with one or more helical cutting grooves; used for drilling holes in metal, wood, etc.
References in periodicals archive ?
Now, however, there's one fewer in the stable: Milacron recently sold Minnesota Twist Drill to a group of its employees and a private investment group known as MTD Acquisitions Inc.
Scott Allison, president of MTD Acquisitions, says his group intends to operate Minnesota Twist Drill and continue to serve its customers.
Nevertheless, the set-plate holes in the first two production lots were drilled with solid HSS twist drills.
The problem of excessive pressure and thrust requirements is exacerbated by the fact that twist drills usually have only two cutting edges that have to bear the entire workload.
XPS-1 6 sharpens HSS and carbide twist drills from 1/8" to 5/8(3-16mm) diameter, from 2" to 8 3/4" long, and angles from 118 to 145 degrees.
XPS-16 sharpens HSS and carbide twist drills from 1/8" to 5/8" (3-16 mm) diameter, from 2" to 8 3/4" long, and angles from 118 to 145 degrees.
XPS-16 sharpens HSS and carbide twist drills from 118" to 5/8" (3-16 mm) diameter, from 2" to 83/4" long, and angles from 118 to 145 degrees.
Within the general class of twist drills there are a number of drill types made for different kinds of operations.
An average flute grinding rate for twist drills between 1/16" and 1/2" diameter on a dedicated operation machine is 200 pieces per hour.
That's because the twist drills have a center point, or dead zone, where the surface speed of the tool approaches zero (as the diameter decreases inward, so to does the sfm).
The drill uses Hougen's "42/43,000-Series" Rotabroach Annular Cutters, which are hollow, cut around the hole, and can cut holes up to three times faster than twist drills.