pilot hole


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pilot hole

- A small hole drilled or hammered for the insertion of a nail or screw, or for drilling a larger hole.
See also related terms for insertion.
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1990: Crews at work on the Channel Tunnel met for the first time when French workers drilled a pilot hole through to the British side of a service tunnel.
According to the company, the Wilson BE number one well will initially be drilled as a vertical pilot hole through the full Eagle Ford formation, which is approximately 400 feet thick in this portion of Dimmit County.
The pilot hole was completed in 14 days, but difficulties arose with backreaming to enlarge the pilot hole.
With a pilot hole of 10mm diameter, round knock-out punches are available for standard cut-outs PG16, M16, M20 and M25.
A self-centering pilot hole bit, sometimes called a Vix-Bit (a brand name), makes the job easy.
1938: Orson Welles's radio adaptation of HG Wells's War Of The Worlds caused panic in the US by convincing many listeners that Martians had really 1990: Crews at work on the Channel Tunnel met for the first time when French workers drilled a pilot hole through to the British side of a service tunnel.
13, a Ditch Witch[R] 40,000-pound pullback JT4020 AT drill unit launched the pilot hole from a set-up spot on the highway south of the creek.
While you are holding the 5 boards together as shown in the photo on page 37, use a 1/16" drill to make a pilot hole for one screw.
Since the last report, the 8 1/2" precautionary pilot hole previously drilled to 202mMDRT (metres Measured Depth below Rotary Table) was opened to 26", ahead of running and cementing 20" surface casing.
Drilling pilot holes - If you need to drill a large diameter hole many tradesmen advise a pilot hole first.