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Ratchet

 

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.

Comments(9)

Anonymous (not verified)

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

umehta

See Rob's Early Bird model

Anonymous (not verified)

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

Anonymous (not verified)

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 (not verified)

What can this be used for????????

 

Anonymous (not verified)

hey rob you do lovely work mmmm chocolate 

Anonymous (not verified)

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

Anonymous (not verified)

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 (not verified)

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

Thanks! Spelling mistake corrected - RI