Are the spur gears involute?

[nmakaroglouU36GX]

Hello to all, my question is how can I check if the spur gears that I can create are involute?

Thank you for any answers.

[JDMather · Accepted solution]

Initially the gears are created with the simplified Wellman's Odontograph method used for cosmetic representation.

To get true involute toothforms you must go one step further and Export Tooth Shape

Timestep 3:49

https://www.youtube.com/watch?v=6dS2u2z6r-g&list=PLp5izJt_zvN0KUccGh5OrgbNTZ_c4vYxs&index=21

[nmakaroglouU36GX]

Thank you very much, your video is very helpful! I will follow up until 9:28, to recreate the assembly with the 2 involute gears. Another question is, I don't need a hole or a key-way on my spur gears but I want them not to pass thru each other so should I do the steps from 13:00 to 13:30? Also, I want the clearance between the teeth to be like yours in 12:50, but I can't do that since I won't have the key-way constraints to line them up per say, so how can I do it?

Thank you in advance for your help!

[JDMather]

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@nmakaroglouU36GX wrote:

...but I want them not to pass thru each other so should I do the steps from 13:00 to 13:30?

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https://www.youtube.com/watch?v=WtmwMnafIj8&list=PLp5izJt_zvN08mpY4UcYrzJV2N6QOLAIR&index=17

[nmakaroglouU36GX]

Thank you very much for this additional video! I have no further problems on this matter.

Thank you once more for your time and your help!

I apologize for the late reply.

[luiscVHTKP]

Hello, Mr. Mather,

I looked at your video (Lab 22 Moment Load), where you explain how it is possible to take the real shape of spurgear. It's perfectly explained! Thanks.

I've been working on an involutre spline (DIN5480) connection. Inventor has this standard, but what is shown also seems to be a simplification, similar to what it shows us in the video. Is there any method to get the actual geometry of the involute spline from the DIN5480 standard?

Do you know of any way to remove the real geometry from this tooth?

I have posted on the forum about these problems. 

Thanks in advance.