View source for Idler Gear

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=====Description=====

Multiple gears can be connected together with one or more [https://en.wikipedia.org/wiki/Gear_ratio#Idler_gears '''Idler Gears'''].


If there are an odd number of gears, the output rotation will be the same direction as the input. If there are an even number, the output will rotate in the opposite direction to the input.


=====Features and Applications=====

<span style="color: green">'''Note 1:'''
Neither the number of idler gears nor the number of teeth on each idler gear affect the overall '''[[Velocity Ratio]]''' or '''[[Mechanical Advantage]]''' which are both governed purely by the number of teeth on the first '''driver''' gear and last '''driven''' gear.
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<span style="color: green">'''Note 2:'''
If both first '''driver''' gear and last '''driven''' gear has the same number of teeth, they will rotate at the same speed, however if they have different numbers of teeth then the gear with fewer teeth will rotate more quickly - i.e. the '''[[Velocity Ratio]]''' ''(or [https://en.wikipedia.org/wiki/Gear_ratio ‘Gear Ratio’])'' of a pair of meshing gears is given as the ''Number of Teeth of the Driver Gear divided by the Number of Teeth'' of the Driven Gear. The '''[[Mechanical Advantage]]''' ''(or [https://en.wikipedia.org/wiki/Torque ‘Torque Ratio’])'' similarly is given as ''No. of Teeth on Driven divided by No. of Teeth on Driver''.
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=====Animations=====

* Examples from '''[[2100 Animated Mechanical Mechanisms|Nguyen Duc Thang's]]''' YouTube Channel '''[[2100 Animated Mechanical Mechanisms]]'''

{|
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| [https://youtu.be/9pCcmDICEOQ '''Windmill'''] - the blue gear is driving and the orange one is driven. The two small gears are idlers. Use the pink arm to stop or reverse the orange gear's rotation.
| {{#ev:youtube|9pCcmDICEOQ|200x200|right||frame|loop=1&autoplay=0&playlist=9pCcmDICEOQ}}
|}
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[[Category:Secondary]]
[[Category:Gears]]