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By 1934, OTC was selling a variety of mechanic's tools to farmers and service stations. The tools were sold directly to the customer from makeshift display boards fitted into panel trucks or converted autos. When World War II broke out in 1939, the U.S. Army and Navy bought large quantities of OTC tools and by 1945, the company had doubled its ...
[[Category:Mechanics templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Mechanics templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
An idler gear is a gear wheel that is inserted between two or more other gear wheels. The purpose of an idler gear can be two-fold. Firstly, the idler gear will change the direction of rotation of the output shaft. Secondly, an idler gear can assist to reduce the size of the input/output gears whilst maintaining the spacing of the shafts.
Red arrows indicate which way force is applied to the gear rack. The rack and pawl are both restricted to only linear movement (not shown). A ratchet (occasionally spelled rachet ) is a mechanical device that allows continuous linear or rotary motion in only one direction while preventing motion in the opposite direction.
Self-centering three-jaw chuck and key with one jaw removed and inverted showing the teeth that engage in the scroll plate. The scroll plate is rotated within the chuck body by the key, the scroll engages the teeth on the underside of the jaws which moves the three jaws in unison, to tighten or release the workpiece.
In gear generation, the tooth flanks are obtained as an outline of the subsequent positions of the cutter, which resembles in shape the mating gear in the gear pair. There are two machining processes employed shaping and milling. There are several modifications of these processes for different cutting tool used. [4]
The pitch surface of an ordinary gear is the shape of a cylinder. The pitch angle of a gear is the angle between the face of the pitch surface and the axis. The most familiar kinds of bevel gears have pitch angles of less than 90 degrees and therefore are cone-shaped. This type of bevel gear is called external because the gear teeth point ...
Unless the dog is engaged, the gear will simply freewheel on the shaft. This word usage is a metaphor derived from the idea of a dog (animal) biting and holding on, the "dog" name derived from the basic idea of how a dog jaw locks on, by the movement of the jaw, or by the presence of many teeth. In engineering the "dog" device has some special ...