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Question about Length of Action of Involute gears

  1. Nov 5, 2015 #1
    1. The problem statement, all variables and given/known data
    Length of action Z(Length of line of action) is [itex] Z=\sqrt{(r_{p}+a_{p})^{2}-(r_{p}cos\phi )^{2}}+\sqrt{(r_{g}+a_{g})^{2}-(r_{g}cos\phi )^{2}}-Ccos\phi[/itex] How can I drive it?

    2. Relevant equations


    3. The attempt at a solution
     
  2. jcsd
  3. Nov 6, 2015 #2

    Nidum

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