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how calculate gears from scratch

By 2ea76538 on 09 Jul 17:38 4 answers 3 comments

A technical problem I face is how do I figure out how to calculate gears from scratch in a assembly system. Meaning i have a space X between two centers and i need to gears to lock in with some ration how do I figure out Dedendum Addendum working depth and all the other stuff. I can figure out how to draw the involute curve but how can I figure out the rest. I know the number of teeth and gear rations are based on diameter of gear but whats the relation of the measurements to the center distances of two gears. Anybody have any idea how should I go about this?

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4 answers

  • Aled J Taylor
    Aled J Taylor over 4 years ago

    Outer diameter = Pitch diameter + 2 x module
    Inner diameter = Pitch diameter - 2.5 x module

  • 2ea76538
    2ea76538 over 4 years ago

    I hate to bother you Aled here is what I need basically center to center distance is 18.9 mm I need to two gear top one 32 teeth bottom one 13 teeth my problem is figuring out the size of each gear and how to make the teeth match with each other.

  • Aled J Taylor
    Aled J Taylor over 4 years ago

    The Module of the gears is 0.84mm.

  • 2ea76538
    2ea76538 over 4 years ago

    I found solution page 14. Only thing I dont get is how did he calculate that dp=20/3 and dg = 40/3 . Can someone explain?


    gears.pdf, 3.96 MB

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