Did a Crown Gear with 87 tooth gear, and 17 tooth pinion, from the crown gear demo excel file.
The pinion is easy. It is just a spur gear. Pinion tooth cutout circular array is done in Top view
The gear steps can be easy, but it did take some time. For the half tooth cutout, mirror, loft, and join, and array circular, is done in the Front view
The .3dm file for the gear is 42,129 kb. (very large)
The .3dm file for the pinion is 647 kb.
The Boolean difference for the gear teeth was done in groups of 9 to 13.
The final gear had to be rotated 180/87 degrees (2.0689+degrees), to mesh with the pinion.
Ctrl-C copy from MoI, and Ctrl-V paste into Geomagic Design (Alibre) was successful.

- Brian

Great work Brian,
cheers,
eric

Brian, I'm not trying to be funny but the image looks like a straight bevel gear, rather than a spiral bevel gear. Am I mistaken?

Mike.

Hi Mike

Thank you for your observation.

I think that you are correct.

According to Wikipedia, "a crown gear is a type of bevel gear where the pitch cone angle is 90 degrees."

Thanks to you, I now see that some columns of both of the excel spreadsheet are hidden, for example H39.
To unhide bevel gear excel columns, highlight columns C and L, right click, and select unhide.
There are a bunch more formulas.

The tooth shape of the gear seems a little strange to me.

I'll have to do some more investigation, comparing the crown demo with the bevel demo.
I'll have to try changing the bevel excel sheet to "flat," a pitch cone angle of 90 degrees.

Brian