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2. Cornwell Tools - Wikipedia

   en.wikipedia.org/wiki/Cornwell_Tools

   Cornwell Quality Tools is an American privately held company manufacturing tools for the automotive and aviation industries. [1] The company is currently based in Wadsworth, Ohio . Cornwell remains as one of two remaining mobile tool companies that still produce their own hand tools in house at their Albion, Pennsylvania foundry and Mogadore ...

3. Hughes Tool Company - Wikipedia

   en.wikipedia.org/wiki/Hughes_Tool_Company

   Hughes Aircraft thrived on wartime contracts during World War II (though not on the only two contracts it received to actually build airplanes), and by the early 1950s was one of America's largest defense contractors and aerospace companies with revenues far outpacing the original oil tools business. In 1953, Hughes Aircraft became a separate ...

4. Annular cutter - Wikipedia

   en.wikipedia.org/wiki/Annular_cutter

   An annular cutter (also called a core drill, core cutter, broach cutter, trepanning drill, hole saw, or cup-type cutter) is a form of core drill used to create holes in metal. An annular cutter, named after the annulus shape , cuts only a groove at the periphery of the hole and leaves a solid core or slug at the center.

5. Rockwell International - Wikipedia

   en.wikipedia.org/wiki/Rockwell_International

   General purpose UK-specification electric drill for home/hobby use purchased circa 1980 fitted with UK-standard BS1363 plug-top. Boston-born Willard Rockwell (1888–1978) made his fortune with the invention and successful launch of a new bearing system for truck axles in 1919.

6. Baker Hughes - Wikipedia

   en.wikipedia.org/wiki/Baker_Hughes

   The facility built diamond core heads and drilling bits and soon began producing stabilizers, drilling jars and other equipment. In 1977, the Celle engineering and manufacturing team introduced the Navi-Drill line of downhole drilling motors, which has led the drilling industry in performance and reliability for three decades.

7. Drill bit - Wikipedia

   en.wikipedia.org/wiki/Drill_bit

   This core drill bit is solid. These core drill bits are similar in appearance to reamers as they have no cutting point or means of starting a hole. They have 3 or 4 flutes which enhances the finish of the hole and ensures the bit cuts evenly. Core drill bits differ from reamers in the amount of material they are intended to remove.