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A socket wrench (or socket spanner) is a type of spanner (or wrench [1] in North American English) that uses a closed socket format, rather than a typical open wrench/spanner to turn a fastener, typically in the form of a nut or bolt. [2] The most prevalent form is the ratcheting socket wrench, often informally called a ratchet.
Theodore Rueb, an engineer for the Sherman-Klove Company, went on to develop a new mechanism for a very successful line of ratchets, scaled from 1/4-inch drive up to 3/4-inch drive. The "round-head" ratchet has remained one of the most popular ratchet styles in the nearly nine decades since S-K's first development, and many modern ratchets are ...
A ratchet consists of a round gear or a linear rack with teeth, and a pivoting, spring-loaded finger called a pawl (or click, in clocks and watches [1] [2]) that engages the teeth. The teeth are uniform but are usually asymmetrical, with each tooth having a moderate slope on one edge and a much steeper slope on the other edge.
Snap-on was founded as the Snap-on Wrench Company in Milwaukee, Wisconsin in 1920 by Joseph Johnson and William Seidemann. [8] The business manufactured and marketed ten sockets that would "snap on" to five interchangeable handles. The company's slogan was "5 do the work of 50". [9] In 1930, the company's headquarters moved to Kenosha, Wisconsin.
An air ratchet wrench is very similar to hand-powered ratchet wrenches in that it has the same square drive, but an air motor is attached to turn the socket drive. Pulling the trigger activates the motor which turns the socket drive. A switch is provided to change which direction the socket drive turns. [1]
A 1/2" drive pistol-grip air impact wrench. An impact wrench (also known as an impactor, impact gun, air wrench, air gun, rattle gun, torque gun, windy gun) is a socket wrench power tool designed to deliver high torque output with minimal exertion by the user, by storing energy in a rotating mass, then delivering it suddenly to the output shaft ...
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