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Thread: How to make a gear turn more than the gears it's connected to.

  1. #1 How to make a gear turn more than the gears it's connected to. 
    Forum Senior Weterman's Avatar
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    Sorry if my title is confusing, but say you have a set of gears, all turning eachother. You turn one at an one end, the gear at the other end will be turning slower than the one you turn. Would it be possible to reverse this? Besides using smaller gears.


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    Why do you think the gear at the other end turns slower? it would if the gear you are turning is smaller than the one being turned. It's just determined by the ratio of the number of teeth on each wheel.


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    Genius Duck Moderator Dywyddyr's Avatar
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    Quote Originally Posted by Weterman View Post
    You turn one at an one end, the gear at the other end will be turning slower than the one you turn.
    You're mistaken.
    The ONLY way that the final gear would "turn slower" is if the gear wheels are sized to do so.
    If they're all the same size (admittedly you haven't specified either way) then then it is impossible for there to be a difference in speeds.

    Would it be possible to reverse this? Besides using smaller gears.
    What do you mean by "reverse"? Turn the "last" wheel so that the first then turns?
    Or get a faster output than input speed?
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    Administrator KALSTER's Avatar
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    It is simply a matter of the teeth of the gears. A gear with 12 teeth will have to be turned for two revolutions in order to turn one with 24 teeth once. As simple as that.
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

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    Quote Originally Posted by KALSTER View Post
    It is simply a matter of the teeth of the gears. A gear with 12 teeth will have to be turned for two revolutions in order to turn one with 24 teeth once. As simple as that.
    I see, thank you.
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    Quote Originally Posted by Dywyddyr View Post
    Quote Originally Posted by Weterman View Post
    You turn one at an one end, the gear at the other end will be turning slower than the one you turn.
    You're mistaken.
    The ONLY way that the final gear would "turn slower" is if the gear wheels are sized to do so.
    If they're all the same size (admittedly you haven't specified either way) then then it is impossible for there to be a difference in speeds.

    Would it be possible to reverse this? Besides using smaller gears.
    What do you mean by "reverse"? Turn the "last" wheel so that the first then turns?
    Or get a faster output than input speed?
    By reverse i mean, to turn one gear, and another gear connected to it to turn faster.
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    Genius Duck Moderator Dywyddyr's Avatar
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    You cannot "connect" a gear to turn faster: it's entirely reliant on wheel size - the number of teeth on each.
    If you have a 38-tooth wheel as the first and it's connected to a 19-tooth wheel then the smaller wheel will turn twice as fast as the larger one.

    Input speed x (No. of teeth on the driver/No. of teeth on the driven) = output speed.
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    Quote Originally Posted by Harold14370 View Post
    Why do you think the gear at the other end turns slower? it would if the gear you are turning is smaller than the one being turned. It's just determined by the ratio of the number of teeth on each wheel.
    Yes, look at any bicycle or motorcycle and this is obvious, the larger gear moves at lesser revolutions than the smaller gear. If they were all the same size, they would serve no point. Also true in trucks and cars, but you can't see the gears unless you take things apart.
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    Quote Originally Posted by Harold14370 View Post
    Why do you think the gear at the other end turns slower? it would if the gear you are turning is smaller than the one being turned. It's just determined by the ratio of the number of teeth on each wheel.
    well honestly, i was playing garrys mod, and put a few gears together. the one at the end barely turned.
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    The gears at the end were not slower, they just took more time to get turning. I solved problem by attaching a small gear to the one that I turn.
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  12. #11  
    exchemist
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    Quote Originally Posted by Weterman View Post
    Sorry if my title is confusing, but say you have a set of gears, all turning eachother. You turn one at an one end, the gear at the other end will be turning slower than the one you turn. Would it be possible to reverse this? Besides using smaller gears.
    I must say I found the whole of this exchange amusingly surreal to read - like a Monty Python sketch or something.
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    Quote Originally Posted by Weterman View Post
    Sorry if my title is confusing, but say you have a set of gears, all turning eachother. You turn one at an one end, the gear at the other end will be turning slower than the one you turn. Would it be possible to reverse this? Besides using smaller gears.
    input the power to the other end of the gearbox
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    Yep, that would do it! :-)
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    Quote Originally Posted by exchemist View Post
    I must say I found the whole of this exchange amusingly surreal to read - like a Monty Python sketch or something.
    Nobody expects the gear ratio inquisition.
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    Administrator KALSTER's Avatar
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    Canada is a pretty weird place in some ways. For all we know they have a March 18th fools tradition.
    Disclaimer: I do not declare myself to be an expert on ANY subject. If I state something as fact that is obviously wrong, please don't hesitate to correct me. I welcome such corrections in an attempt to be as truthful and accurate as possible.

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  17. #16  
    exchemist
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    Quote Originally Posted by John Galt View Post
    Quote Originally Posted by exchemist View Post
    I must say I found the whole of this exchange amusingly surreal to read - like a Monty Python sketch or something.
    Nobody expects the gear ratio inquisition.
    Quite. Actually, on re-reading it's still bloody funny, but reminds me more of This is Spinal Tap.
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