Is there any way to generate two gears automatically?

[skillz231]

In my Fusion project, I have two long cylinders. When one is rotated, I want the other one to rotate at a different speed. This means I need two gears. One cylinder is 3mm in diameter and the other one is 2.3mm in diameter. I used the Insert McMaster-Carr option to find two gears with one being 12 teeth and the other 24 teeth. Anyway, that's not important, because I soon realised that resizing the gears, moving them into exact position, then resizing them again so that they make contact since the two cylinders are fixed in position (not to mention making the hole in the middle the correct size each time I resized the gear). Is there some better way to do this? Some sort of plugin maybe? Where I can just snap two gears to the two cylinders and just enter the number of teeth I want on each, and it resizes everything accordingly? Because at the moment, my method is not going to work.

[HughesTooling · Accepted solution]

Fusion comes with a gear script but it's not straightforward getting the correct size\pitch between 2 gears.

I'll use metric gears as an example as they're a bit easier to work with. If you make a gear with 10 teeth and use a 1 module the pitch diameter will be 10mm so two 10 tooth gears will need to be 10mm apart to engage correctly.

For your problem you will need to use the same module on both gears, what is the pitch between the gears and what ratio do you need? Just as an example say you want 10 teeth on one gear and 15 on the other and a 10mm pitch, divide 10 by total teeth divided by 2 will give you a module of 0.8.

Mark

PS you can run the gear script by pressing Shift+S then on the add in tab select the gear script.