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Overlap ratio or axial contact ratio in helical gears

  1. Jun 25, 2014 #1
    Hi,

    I am trying to understand the Overlap Ratio (OR) / axial contact ratio of a helical gear pair. Unlike transverse contact ratio, I am unable to understand OR so easily.
    What does it mean if the OR is exactly 1? What will happen practically when it goes less than one? Thanks.
     
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  3. Jun 25, 2014 #2

    UltrafastPED

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  4. Jun 26, 2014 #3
    Thanks. But this book again tells the OR as a mathematical relation whereas I want to understand it physically. I assume a case where the transverse contact ratio is more than 1 already and want to know the effect when OR is less that one.
     
  5. Jul 2, 2014 #4

    Baluncore

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    Last edited by a moderator: May 6, 2017
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