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  1. Ratchet (device) - Wikipedia

    • 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. Ratchets are widely used in machinery and tools. The word ratchet is also used informally to refer to a ratcheting socket wrench. See more

    Theory of operation

    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 … See more

    Uses

    Ratchet mechanisms are used in a wide variety of applications, including these:
    Cable ties
    Capstans
    Caulking guns
    ClocksSee more

    Gallery

    • Ratcheting socket wrench or spanner.
    • A ratchet lever hoist, also known as a 'come-along.'
    • The ratchet mechanism of a cable tie. … See more

    See also

    Brownian ratchet
    Sprag clutch
    Check valve, a device that allows fluids to flow in only one direction
    Diode, a device that allows electric current to flow in only one direction… See more

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