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.

pilot hole

A hole which serves as a guide for a nail or screw, or for drilling a larger-size hole.
References in periodicals archive ?
Due to the length and large number of pre-existing utilities already consuming available ROW space along the alignment, pilot hole intersect was the preferred method of choice for drilling.
The pilot hole was completed in one shot in four days.
Drills with a unique Self Centering (SC) Technology, enabling accurate pilot hole placement
Pilot holes are smaller diameter holes, which can be used as guides as you slowly increase the size of diameter of your drilled holes.
The first stage of the process involves drilling a pilot hole between two ground entry points.
Q When I have to drill a pilot hole for a wood screw in a specific spot, in a buttplate for example, I almost always end up with the screw too far to the right or left, up or down.
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.
Initial tests were conducted to determine optimum pilot hole diameters.
Only a boss with a molded or drilled pilot hole is needed for joining with self threading screws.
First drill a pilot hole (the exact drill diameter is specified with the extractor) into the screw, then twist the extractor into the hole.
But a recently completed pilot hole down to 4 km showed the scientists how little they actually know about the rock underground.
DENVER & PERTH, Australia -- Samson Oil & Gas Limited (ASX: SSN) (NYSE AMEX: SSN) advises that the Defender US33 #2-29H well reached a total depth of 7,450 feet in the vertical pilot hole and is currently running an extensive combination of geophysical logging tools down the hole to analyze the rock and fluid properties of the various geologic formations.