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In metalworking, a knockout punch, also known as a chassis punch, panel punch, Greenlee punch, or a Q-max, [1] is a hand tool used to punch a hole through sheet metal. It is a very simple tool that consists of a punch, die, and screw. There are three different drive systems: manual, ratchet, and hydraulic. [2]
Greenlee is an American industrial and electrical tool company headquartered in Rockford, Illinois.It was founded in 1862 by twin brothers Robert L. and Ralph S. Greenlee to manufacture their invention called a hollow chisel mortiser, consisting of a drill surrounded by four chisel blades used in making mortises (the hole) for mortise and tenon joints, for the furniture industry in Rockford. [1]
[1]: i Although Greenlee was the more senior captain, it was agreed between them prior to the flight that Conway would act as captain, and Greenlee would act as copilot. [ 1 ] : 2 According to his post-accident testimony, Conway occupied the left (captain's) seat for the duration of Flight 201/8.
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OTC Tool Company logo. OTC Tools (originally Owatonna Tool Company) is a tool and equipment manufacturer.It was founded in Owatonna, Minnesota, by Godfrey Kaplan, who operated a small machine shop there.
The exact mechanism of the failure involved the servo valve, which remains dormant and cold for much of the flight at high altitude, seizing after being injected with hot hydraulic fluid that has been in continuous action throughout the plane. This specific condition occurred in fewer than 1% of the laboratory tests, but explained the rudder ...