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 ?
The low-profile unit has a nominal boring size of 3 m in diameter and 500 m in depth and has a standard pilot hole diameter of 311 mm.
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.
YOU can drill a pilot hole with a standard drill bit, then create a recess for the screw head with a countersink cutter.
If possible, a pilot hole is begun with a slightly smaller bit than the recoil pad screws you intend to use.
The pilot hole was completed in one shot in four days.
Drilling pilot holes - If you need to drill a large diameter hole many tradesmen advise a pilot hole first.
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.
Initial tests were conducted to determine optimum pilot hole diameters.