Ratchet

Thu, 30 Sep 2010

 

The ratchet can be used to move a toothed wheel one tooth at a time. The part used to move the ratchet is known as the pawl.
The ratchet can be used as a way of gearing down motion. By its nature motion created by a ratchet is intermittent. By using two pawls simultaneously this intermittent effect can be almost, but not quite, removed.
Ratchets are also used to ensure that motion only occurs in only one direction, useful for winding gear which must not be allowed to drop. Ratchets are also used in the freewheel mechanism of a bicycle.
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Comments (9)

  • Anonymous June 7, 2011 at 3:58 am

    I wonder what this mechanism

    I wonder what this mechanism can be used for???

    • umehta July 14, 2011 at 1:49 pm

      See Rob’s Early Bird model

      See Rob's Early Bird model

    • Anonymous August 11, 2011 at 2:48 am

      This mechanism is used when

      This mechanism is used when rotation is to be done in single direction and with intermittent motion.

    • Anonymous November 16, 2011 at 4:50 pm

      for pulling water from a

      for pulling water from a well. even if you leave it in between coz of sum wrk it'll hang der, savin u 4m losi ur bucket!

    • Anonymous March 22, 2012 at 8:15 pm

      The oddometer in a car to

      The oddometer in a car to show how many miles you have travelled. It moves forward in increments so that you can see a full digit not just part of digit if ir just turned slowly.

      The day display on a watch is similar.

  • Anonymous November 18, 2011 at 5:51 am

    What can this be used

    What can this be used for????????

     

  • Anonymous November 30, 2011 at 12:31 pm

    hey rob you do lovely work

    hey rob you do lovely work mmmm chocolate 

    • Anonymous December 1, 2011 at 7:12 pm

      They can be used in roller

      They can be used in roller coasters – yeeah-ha!!!!!!!!!!!!!

  • Anonymous November 24, 2014 at 9:52 am

    You spelt simultaneously

    You spelt simultaneously wrong, Rob. 🙂 still love you tho <3

    Thanks! Spelling mistake corrected – RI

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