pilot hole


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pilot hole

[′pī·lət ‚hōl]
(design engineering)
In metal-forming operations, a prepunched hole in a metal strip into which the pilot component of the die enters in order to assure precise registration of the strip at each work station.
(engineering)
A small hole drilled ahead of a larger borehole.
(mechanical engineering)
A hole drilled in a piece of wood to serve as a guide for a nail or a screw or for drilling a larger hole.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

pilot hole

A hole which serves as a guide for a nail or screw, or for drilling a larger-size hole.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
In conjunction, the company's second well, called the Wilson BE number two well, will be drilled subsequently as a horizontal Eagle Ford well with no pilot hole.
"But the hole had not been completely reamed, and a donut could not pass through un-reamed portions of the pilot hole," said Leo Aguirre, HardRock's big rig superintendent.
YOU can drill a pilot hole with a standard drill bit, then create a recess for the screw head with a countersink cutter.
The pilot hole was completed in one shot in four days.
Pilot holes are smaller diameter holes, which can be used as guides as you slowly increase the size of diameter of your drilled holes.
Also, with their method, called "down reaming," they drill a pilot hole of a much smaller diameter.
The first stage of the process involves drilling a pilot hole between two ground entry points.
4 Centrally insert screw halfway using light finger pressure to create a pilot hole and leave the screws in place to set for an hour.
Didon-6 is the pilot hole of the second production well of the Didon Phase II development programme.
Drill a pilot hole in the center of the overlap area and drive a 12 inch nail or rebar through the pilot hole.
When the glue has set, drill a pilot hole through the center of the dowel.