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pilot drill

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  • Pilot hole — A pilot hole is a smaller hole drilled into a material prior to a larger hole being drilled, widening the hole to the desired width. Drilling a pilot hole prevents a larger drill bit from slipping on the material a potential safety hazard, as… …   Wikipedia

  • Drill Sergeant Identification Badge — Drill Sergeant ID Badge The Drill Sergeant Identification Badge is a military badge of the United States Army which was first issued on January 15, 1958. It is also nicknamed the pumpkin patch due to its appearance when worn in the non subdued… …   Wikipedia

  • Drill bit — For the fictional character, see Drill Bit (Transformers). For the cancelled skyscraper nicknamed Drill bit, see Chicago Spire. For the types used in drilling wells, see Well drilling. From top to bottom: Spade, lip and spur (brad point), masonry …   Wikipedia

  • Drill instructor — A USMC drill instructor A drill instructor is a non commissioned officer or Staff Non Commissioned Officer in the armed forces or police forces with specific duties that vary by country. In the U.S. armed forces, they are assigned the duty of… …   Wikipedia

  • pilot hole — When using a large drill bit, it is sometimes hard for the drill to cut through the metal and do it evenly in a straight line. A pilot hole is first made with a small bit. Then, when you use the large bit, the drilling is much easier …   Dictionary of automotive terms

  • Drill sergeant — Sergeant Ser geant, n. [F. sergent, fr. L. serviens, entis, p. pr. of servire to serve. See {Serve}, and cf. {Servant}.] [Written also {serjeant}. Both spellings are authorized. In England {serjeant} is usually preferred, except for military… …   The Collaborative International Dictionary of English

  • pilot hole — noun A narrow hole drilled or punched into a surface, to facilitate the insertion of a wider screw, nail, drill bit, or other boring tool. During the sinking of the last 150 feet, a pilot hole was kept in advance, so as to prevent any unforeseen… …   Wiktionary

  • pilot bit — noun a small bit that drills a first hole to guide a larger drill • Hypernyms: ↑bit …   Useful english dictionary

  • List of Cold War pilot defections — During the Cold War, a number of pilots from various nations (Eastern Bloc, Western Bloc, and non aligned) defected with their aircraft to other countries. Contents 1 Afghanistan 2 Algeria 3 China …   Wikipedia

  • Chinese fire drill — A Chinese fire drill is a slang term that has been used by Westerners for more than a century, and is today considered offensive or racist.[1][2][3] It is used to describe any situation that is chaotic or confusing.[4] It is also used to describe …   Wikipedia

  • Christopher Magee (fighter pilot) — Christopher Lyman Magee Nickname CL Zark Wildman Maggie Fox Born 1917 Omaha, Nebraska Died 1995 (aged 77–78) Chicago, Illinois …   Wikipedia

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