How to model Involute Gear in Solidworks?


these are the steps...

  1. Step 1:

    First of all we need to add some equations... so Tools -> Equations ->

  2. Step 2:

    We add the following equations... (module and No. of teeth is up to you)

  3. Step 3:

    After we add all equations, we click ok and then we start a new sketch on front plane... We create a construction line vertical...(Random length)

  4. Step 4:

    Then we create a horizontal construction line at the length of the D0.. and then we draw a circle.. We make the circle defined by linking the dimension with the equation..

  5. Step 5:

    Next we create another construction line with an angle of a(degrees)...

  6. Step 6:

    We create another one on the other side and make them co-linear. Then we draw another one from the cinter of the circle and make it perpendicular...

  7. Step 7:

    We draw a circle from the center to that point. We then draw 5 construction lines from the center of the circle dividing the arc into 5 pieces...

  8. Step 8:

    After, we divide the line above into 5 pieces with points...

  9. Step 9:

    And we make the sections equal.. after that, we link the section dimensions, with the arc sections below...

  10. Step 10:

    Next we draw construction lines, from every point of the arcs, and make them tangent to the circle... dimension them as in the picture...

  11. Step 11:

    Same thing for the back side...

  12. Step 12:


  13. Step 13:

    tangent lines...

  14. Step 14:

    next we create top circle of the gear... and link the dimension to the equation shown in the picture...

  15. Step 15:

    same at here...

  16. Step 16:

    select spline, and join the end points of the contsruction lines...

  17. Step 17:

    Join the lower end of the spline with the center of the circle with a line..

  18. Step 18:

    create a construction line in the point shown in the picture..

  19. Step 19:


  20. Step 20:

    convent entities for the 2 circles..

  21. Step 21:


  22. Step 22:

    extrude the circle...

  23. Step 23:

    then the tooth..

  24. Step 24:

    add fillet linked with the following equation...

  25. Step 25:

    Circular patern linked to Z

  26. Step 26:

    And Voila.... a fully defined involute gear...


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  • Missing feed
    Jim Pfaltzgraff

    In step 2 the variable names are cut off, making the tutorial difficult to use.

    April 20th, 2017 21:04