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 ?
The relevant FM values in drilling tests using twist drills in Table 1 are as shown in Table 2; like this, the training data are ready for MGGP model.
Scott Allison, president of MTD Acquisitions, says his group intends to operate Minnesota Twist Drill and continue to serve its customers.
Where the older twist drills produced only about 100 holes before require attention, the new drill is producing about 22,000 holes before inserts need to be replaced.
Though they did the job, the solid HSS twist drills turned at just 300 rpm and advanced at just 3.
There is one other point to be made about drilling with twist drills that creates problems -- starting the drill.
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.
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.
For Decibel Products, Dallas, TX, a division of Allen Tel Com, the message was clear: using conventional twist drills to make holes was not getting the job done.
For many years, this had been the domain of the conventional HSS twist drills.